About Arch Anywhere. As the name implies, Arch Anywhere let’s you to install a fully functional, custom Arch Linux system with graphical desktop environment and extra software can be installed in minutes without much hassle. I quickly show how to install Arch Linux. So, you can see that the Arch Linux installation process is pretty easy. For Arch Installation in the UEFI mode, follow this guide https://youtu.be.

1. Easy Steps To Install Arch Linux Desktop Download
2. Three Easy Steps To Install Kodi
3. Easy Steps To Install Kodi
4. Arch Linux Install Tutorial

Brief: This tutorial shows you how to install Arch Linux in easy to follow steps.

Arch Linux is a x86-64 general-purpose Linux distribution which has been popular among the DIY enthusiasts and hardcore Linux users. The default installation covers only a minimal base system and expects the end user to configure and use it. Based on the KISS – Keep It Simple, Stupid! principle, Arch Linux focus on elegance, code correctness, minimalist system and simplicity.

Arch Linux supports the Rolling release model and has its own package manager – pacman. With the aim to provide a cutting-edge operating system, Arch never misses out to have an up-to-date repository. The fact that it provides a minimal base system gives you a choice to install it even on low-end hardware and then install only the required packages over it.

Also, its one of the most popular OS for learning Linux from scratch. If you like to experiment with a DIY attitude, you should give Arch Linux a try. It’s what many Linux users consider a core Linux experience.

In this article, we will see how to install and set up Arch Linux and then a desktop environment over it.

How to install Arch Linux

The method we are going to discuss here wipes out existing operating system(s) from your computer and install Arch Linux on it. So if you are going to follow this tutorial, make sure that you have backed up your files or else you’ll lose all of it. You have been warned.

But before we see how to install Arch Linux from a USB, please make sure that you have the following requirements:

Requirements for installing Arch Linux:

• A x86_64 (i.e. 64 bit) compatible machine
• Minimum 512 MB of RAM (recommended 2 GB)
• At least 1 GB of free disk space (recommended 20 GB for basic usage)
• An active internet connection
• A USB drive with minimum 2 GB of storage capacity
• Familiarity with Linux command line

Once you have made sure that you have all the requirements, let’s proceed to install Arch Linux.

Step 1: Download the ISO

You can download the ISO from the official website. Arch Linux requires a x86_64 (i.e. 64 bit) compatible machine with a minimum of 512 MB RAM and 800 MB disk space for a minimal installation. However, it is recommended to have 2 GB of RAM and at least 20 GB of storage for a GUI to work without hassle.

Step 2: Create a live USB of Arch Linux

We will have to create a live USB of Arch Linux from the ISO you just downloaded.

If you are on Linux, you can use dd command to create a live USB. Replace /path/to/archlinux.iso with the path where you have downloaded ISO file, and /dev/sdx with your drive in the example below. You can get your drive information using lsblk command.

On Windows, there are several tools to create a live USB. The recommended tool is Rufus. We have already covered a tutorial on how to create a live USB of Antergos Linux using Rufus in the past. Since Antergos is based on Arch, you can follow the same tutorial.

Step 3: Boot from the live USB

Once you have created a live USB for Arch Linux, shut down your PC. Plugin your USB and boot your system. While booting keep pressing F2, F10 or F1dependinging upon your system) to go into boot settings. In here, select to boot from USB or removable disk.

Once you select that, you should see an option like this:

Select Boot Arch Linux (x86_64). After various checks, Arch Linux will boot to login prompt with root user.

Next steps include partitioning disk, creating the filesystem and mounting it.

Step 4: Partitioning the disks

The first step includes partitioning your hard disk. A single root partition is the simplest one where we will create a root partition (/), a swapfile and home partition.

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I have a 19 GB disk where I want to install Arch Linux. To create a disk, type

Type “n” for a new partition. Type in “p” for a primary partition and select the partition number.

The First sector is automatically selected and you just need to press Enter. For Last sector, type the size you want to allocate for this partition.

Create two more partitions similarly for home and swap, and press ‘w‘ to save the changes and exit.

Step 4: Creating filesystem

Since we have created 3 different partitions, the next step is to format the partition and create a filesystem.

We will use mkfs for root and home partition and mkswap for creating swap space. We are formatting our disk with ext4 filesystem.

Lets mount these filesystems to root and home

Step 5: Installation

Since we have created partitioning and mounted it, let’s install the base package. A base package contains all the necessary package to run a system, some of which are the GNU BASH shell, data compression tool, file system utilities, C library, compression tools, Linux kernels and modules, library packages, system utilities, USB devices utilities, vi text editor etc.

Step 6: Configuring the system

Generate a fstab file to define how disk partitions, block devices or remote file systems are mounted into the filesystem.

Change root into the new system, this allows changing the root directory for the current running process and the child process.

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Some systemd tools which require an active dbus connection can not be used inside a chroot, hence it would be better if we exit from it. To exit chroot, simpy use the below command:

Step 7. Setting Timezone

Use below command to set the time zone.

To get a list of zone, type

Run hwclock to set the hardware clock.

Step 8. Setting up Locale.

File /etc/locale.gen contains all the local settings and system language in a commented format. Open the file using vi editor and un-comment the language you prefer. I had done it for en_GB.UTF-8.

Now generate the locale config in /etc directory file using the commands below:

Step 9. Installing bootloader, setting up hostname and root password

Create a /etc/hostname file and add a matching entry to host.

127.0.1.1 myhostname.localdomain myhostname

I am adding ItsFossArch as a hostname:

and then to the /etc/hosts file.

To install a bootloader use below commands :

To create root password, type

and enter your desired password.

Once done, update your system. Chances are that you already have an updated system since you have downloaded the latest ISO file.

Congratulations! You have successfully installed a minimal command line Arch Linux.

In the next step, we will see how to set up a desktop environment or Graphical User Interface for the Arch Linux. I am a big fan of GNOME desktop environment, and we will be working on installing the same.

Step 10: Install a desktop environment (GNOME in this case)

Before you can install a desktop environment, you will need to configure the network first.

You can see the interface name with below command:

For me, it’s enp0s3.

Add the following entries in the file

Save and exit. Restart your systemd network for the changes to reflect.

And then add the below two entries in /etc/resolv.conf file.

Next step is to install X environment.

Type the below command to install the Xorg as display server.

gnome contains the base GNOME desktop. gnome-extra contains GNOME applications, archive manager, disk manager, text editors and more.

The last step includes enabling the display manager GDM for Arch.

Restart your system and you can see the GNOME login screen.

Final Words on Arch Linux installation

A similar approach has been demonstrated in this video (watch in full screen to see the commands) by It’s FOSS reader Gonzalo Tormo:

You might have realized by now that installing Arch Linux is not as easy as installing Ubuntu. However, with a little patience, you can surely accomplish it and then tell the world that you use Arch Linux.

Arch Linux installation itself provides a great deal of learning. I recommend a few essential things to do after installing Arch Linux where you’ll find steps to install various other desktop environments and learn more about the OS. You can keep playing with it and see how powerful Arch is.

Let us know in the comments if you face any difficulty while installing Arch Linux.

KDE is a software project currently comprising a desktop environment known as Plasma, a collection of libraries and frameworks (KDE Frameworks) and several applications (KDE Applications) as well. KDE upstream has a well maintained UserBase wiki. Detailed information about most KDE applications can be found there.

• 1Installation
• 2Starting Plasma
• 3Configuration
  • 3.1Personalization
    • 3.1.1Plasma desktop
      • 3.1.1.1Themes
  • 3.7Phonon
• 4Applications
  • 4.1System administration
  • 4.4PIM
    • 4.4.1Akonadi
      • 4.4.1.1MySQL
      • 4.4.1.2PostgreSQL
  • 4.5KDE Telepathy
• 5Tips and tricks
  • 5.1Use a different window manager
• 6Troubleshooting
  • 6.1Fonts
  • 6.2Configuration related
  • 6.3Graphical problems
  • 6.4Sound problems
  • 6.5Power management
  • 6.6KMail
  • 6.7Networking

Installation

Plasma

Before installing Plasma, make sure you have a working Xorg installation on your system.

Install the plasma-meta meta-package or the plasma group. For differences between plasma-meta and plasma reference Package group. Alternatively, for a more minimal Plasma installation, install the plasma-desktop package.

To enable support for Wayland in Plasma, also install the plasma-wayland-session package.

KDE applications

To install the full set of KDE Applications, install the kde-applications group or the kde-applications-meta meta-package. Note that this will only install applications, it will not install any version of Plasma.

Unstable releases

See Official repositories#kde-unstable

Starting Plasma

Plasma can be started either using a display manager, or from the console.

Using a display manager

• Select Plasma to launch a new session in Xorg.
• Installplasma-wayland-session and select Plasma (Wayland) to launch a new session in Wayland.

From the console

• To start Plasma with xinit/startx, append exec startkde to your .xinitrc file. If you want to start Xorg at login, please see Start X at login.
• To start a Plasma on Wayland session from a console, run XDG_SESSION_TYPE=wayland dbus-run-session startplasmacompositor.[1]

Configuration

Most settings for KDE applications are stored in ~/.config/. However, configuring KDE is primarily done through the System Settings application. It can be started from a terminal by executing systemsettings5.

Personalization

Plasma desktop

Themes

Plasma themes define the look of panels and plasmoids. For easy system-wide installation, some themes are available in both the official repositories and the AUR.

Plasma themes can also be installed through System Settings > Workspace Theme > Plasma Theme > Get new themes from the Internet.

The KDE-Store offers more Plasma customization's, like SDDM themes and splash-screens.

Qt and GTK Applications Appearance

Qt4

Breeze is not directly available for Qt4 since it cannot be built without KDE 4 packages, which have been dropped from the extra repository in August 2018 (FS#59784). However you can install breeze-gtk and pick GTK as GUI Style by running qtconfig-qt4.

GTK

The recommended theme for a pleasant appearance in GTK applications is breeze-gtk or gnome-breeze-git^AUR, a GTK theme designed to mimic the appearance of Plasma's Breeze theme.Install kde-gtk-config (part of the plasma group) and select the installed GTK-theme for GTK2/GTK3-Theme in System Settings > Application Style > GNOME/GTK Application Style.

In some themes, tooltips in GTK applications have white text on white backgrounds making it difficult to read. To change the colors in GTK2 applications, find the section for tooltips in the .gtkrc-2.0 file and change it. For GTK3 application two files need to be changed, gtk.css and settings.ini.

Some GTK2 programs like vuescan-bin^AUR still look hardly usable due to invisible checkboxes with the Breeze or Adwaita skin in a Plasma session. To workaround this, install and select e.g. the Numix-Frost-Light skin of the numix-frost-themes^AUR under System Settings > Application Style > GNOME/GTK Application Style > GTK2 Theme:. Numix-Frost-Light looks similar to Breeze.

Faces

User's face can be set through System Settings > Accounts Details > User Manager.

If User Manager is not found, install user-manager to get it.

Widgets

Plasmoids are little scripted (plasmoid scripts) or coded (plasmoid binaries) KDE applications designed to enhance the functionality of your desktop.

The easiest way to install plasmoid scripts is by right-clicking onto a panel or the desktop and choosing Add Widgets > Get New Widgets.. > Download New Plasma Widgets. This will present a nice frontend for https://store.kde.org/ that allows you to install, uninstall, or update third-party plasmoid scripts with literally just one click.

Many Plasmoid binaries are available from the AUR.

Sound applet in the system tray

Installplasma-pa or kmix (start Kmix from the Application Launcher). plasma-pa is now installed by default with plasma, no further configuration needed.

Disable panel shadow

As the Plasma panel is on top of other windows, its shadow is drawn over them. [2] To disable this behaviour without impacting other shadows, installxorg-xprop and run:

then select the panel with the plus-sized cursor. [3] For automation, install xorg-xwininfo and create the following script:

Set execution permissions for the script:

The script can be run on login with Add Script in Autostart:

Window decorations

Window decorations can be changed in System Settings > Application Style > Window Decorations.

There you can also directly download and install more themes with one click, and some are available in the AUR.

Icon themes

Icon themes can be installed and changed on System Settings > Icons.

Space efficiency

The Plasma Netbook shell has been dropped from Plasma 5, see the following KDE forum post. However, you can achieve something similar by editing the file ~/.config/kwinrc adding BorderlessMaximizedWindows=true in the [Windows] section.

Thumbnail generation

To allow thumbnail generation for media or document files on the desktop and in Dolphin, install kdegraphics-thumbnailers and ffmpegthumbs.

Then enable the thumbnail categories for the desktop via right click on the desktop background > Configure Desktop > Icons > Configure Preview Plugins...

In Dolphin, navigate to Control > Configure Dolphin.. > General > Previews.

Printing

You can also configure printers in System Settings > Printers. To use this method, you must first install print-manager and cups. See CUPS#Configuration.

Samba/Windows support

If you want to have access to Windows services, install Samba (package samba).

The Dolphin share functionality requires the package kdenetwork-filesharing and usershares, which the stock smb.conf does not have enabled. Instructions to add them are in Samba#Enable Usershares, after which sharing in Dolphin should work out of the box after restarting Samba.

Unlike GTK file browsers which utilize GVfs also for the launched program, opening files from Samba shares in Dolphin via KIO makes Plasma copy the whole file to the local system first with most programs (VLC is an exception).To workaround this, you can use a GTK based file browser like thunar with gvfs and gvfs-smb (and gnome-keyring for saving login credentials) to access SMB shares in a more able way.

Another possibility is to mount a Samba share via cifs-utils to make it look to Plasma like if the SMB share was just a normal local folder and thus can be accessed normally.See Samba#Manual mounting and Samba#Automatic mounting.

An GUI solution is available with samba-mounter-git^AUR, which offers basically the same functionality via an easy to use option located at System Settings > Network Drivers. However, it might break with new KDE Plasma versions.

KDE Desktop activities

KDE Desktop Activities are special workspaces where you can select specific settings for each activity that apply only when you are using said activity.

Power management

Installpowerdevil for an integrated Plasma power managing service. This service offers additional power saving features, monitor brightness control (if supported) and battery reporting including peripheral devices.

An alternative package without NetworkManager and Bluez dependencies is provided by powerdevil-light^AUR.

The factual accuracy of this article or section is disputed.

Autostart

Plasma can autostart applications and run scripts on startup and shutdown. To autostart an application, navigate to System Settings > Startup and Shutdown > Autostart and add the program or shell script of your choice. For applications, a .desktop file will be created, for shell scripts, a symlink will be created.

• Programs can be autostarted on login only, whilst shell scripts can also be run on shutdown or even before Plasma itself starts.
• Shell scripts will only be run if they are marked executable.

• Place Desktop entries (i.e. .desktop files) in the appropriate XDG Autostart directory.

• Place or symlink shell scripts in one of the following directories:

~/.config/plasma-workspace/env/

for executing scripts at login before launching Plasma.

~/.config/autostart-scripts/

for executing scripts at login.

~/.config/plasma-workspace/shutdown/

for executing scripts on shutdown.

Phonon

From Wikipedia:

Phonon is the multimedia API provided by KDE and is the standard abstraction for handling multimedia streams within KDE software and also used by several Qt applications.

Phonon was originally created to allow KDE and Qt software to be independent of any single multimedia framework such as GStreamer or xine and to provide a stable API for a major version's lifetime.

Phonon is being widely used within KDE, for both audio (e.g., the System notifications or KDE audio apps) and video (e.g., the Dolphin video thumbnails).

Which backend should I choose?

You can choose between backends based on GStreamer and VLC – each available in versions for Qt4 applications and Qt5 applications (phonon-qt4-gstreamer^AUR, phonon-qt5-gstreamer – phonon-qt4-vlc^AUR, phonon-qt5-vlc).

Upstream prefers VLC but prominent Linux distributions (Kubuntu and Fedora-KDE for example) prefer GStreamer because that allows them to easily leave out patented MPEG codecs from the default installation. Both backends have a slightly different features set. The Gstreamer backend has some optional codec dependency, install them as needed:

• gst-libav — Libav codecs.
• gst-plugins-good — PulseAudio support and additional codecs.
• gst-plugins-ugly — additional codecs.
• gst-plugins-bad — additional codecs.

In the past other backends were developed as well but are no longer maintained and their AUR packages have been deleted.

• Multiple backends can be installed at once and prioritized at System Settings > Multimedia > Audio and Video > Backend.
• According to the KDE forums, the VLC backend lacks support for ReplayGain.
• If using the VLC backend, you may experience crashes every time Plasma wants to send you an audible warning and in quite a number of other cases as well [5]. A possible fix is to rebuild the VLC plugins cache:

Applications

The KDE project provides a suite of applications that integrate with the Plasma desktop. See the kde-applications group for a full listing of the available applications. Also see Category:KDE for related KDE application pages.

Aside from the programs provided in KDE Applications, there are many other applications available that can complement the Plasma desktop. Some of these are discussed below.

System administration

Terminate Xorg server through KDE System Settings

Navigate to the submenu System Settings > Input Devices > Keyboard > Advanced (tab) > 'Key Sequence to kill the X server' and ensure that the checkbox is ticked.

KCM

KCM stands for KConfig Module. KCMs can help you configure your system by providing interfaces in System Settings, or through the command line with kcmshell5.

• sddm-kcm — KDE Config Module for SDDM.

https://cgit.kde.org/sddm-kcm.git sddm-kcm

• kde-gtk-config — GTK2 and GTK3 Configurator for KDE.

https://cgit.kde.org/kde-gtk-config.git kde-gtk-config

• System policies — Set of configuration modules which allows administrator to change PolicyKit settings.

https://cgit.kde.org/polkit-kde-kcmodules-1.git kcm-polkit-kde-git^AUR

• wacom tablet — KDE GUI for the Wacom Linux Drivers.

https://www.linux-apps.com/p/1127862/ kcm-wacomtablet

• Kcmsystemd — systemd control module for KDE.

https://github.com/rthomsen/kcmsystemd systemd-kcm^AUR

More KCMs can be found at linux-apps.com.

Desktop search

KDE implements desktop search with a software called Baloo, a file indexing and searching solution.

Web browsers

The following web browsers can integrate with Plasma:

• Konqueror — Part of the KDE project, supports two rendering engines – KHTML and the Chromium-based Qt WebEngine.

https://konqueror.org/ konqueror

• Falkon — A Qt web browser with Plasma integration features, previously known as Qupzilla. It uses Qt WebEngine.

https://userbase.kde.org/Falkon/ falkon

• Chromium — Chromium and its proprietary variant Google Chrome have limited Plasma integration. They can use KWallet and KDE Open/Save windows.

https://www.chromium.org/ chromium

• Firefox — Firefox can be configured to better integrate with Plasma. See Firefox KDE integration for details.

https://mozilla.org/firefox firefox

PIM

KDE offers its own stack for personal information management. This includes emails, contacts, calendar, etc. To install all the PIM packages, you could use the meta-package kdepim-meta.

Akonadi

Akonadi is a system meant to act as a local cache for PIM data, regardless of its origin, which can be then used by other applications. This includes the user's emails, contacts, calendars, events, journals, alarms, notes, and so on. Akonadi does not store any data by itself: the storage format depends on the nature of the data (for example, contacts may be stored in vCard format).

Install akonadi. For additional addons, install kdepim-addons.

See also FS#32878.

MySQL

By default Akonadi will use /usr/bin/mysqld (MariaDB by default, see MySQL for alternative providers) to run a managed MySQL instance with the database stored in ~/.local/share/akonadi/db_data/.

System-wide MySQL instance

Akonadi supports using the system-wide MySQL for its database.[6]

This article or section needs expansion.

PostgreSQL

Akonadi supports either using the existing system-wide PostgreSQL instance, i.e. postgresql.service, or running a PostgreSQL instance with user privileges and the database in ~/.local/share/akonadi/db_data/.

Per-user PostgreSQL instance

Installpostgresql and postgresql-old-upgrade.

Edit Akonadi configuration file so that it has the following contents:

• When Akonadi starts, it will create the [QPSQL] section and set the appropriate variables in it.
• The database will be stored in ~/.local/share/akonadi/db_data/.

Start Akonadi with akonadictl start, and check its status: akonadictl status.

• Starting with akonadi 19.08.0-1 the PostgreSQL database cluster in ~/.local/share/akonadi/db_data/ will get automatically upgraded when a major PostgreSQL version upgrade is detected.
• For previous akonadi versions major PostgreSQL version upgrades will require a manual database upgrade. Follow the update instructions on KDE UserBase Wiki. Make sure to adjust the paths to PostgreSQL binaries to those used by postgresql and postgresql-old-upgrade, see PostgreSQL#Upgrading PostgreSQL.

System-wide PostgreSQL instance

This requires an already configured and running PostgreSQL.

Create a PostgreSQL user account for your user:

Create a database for Akonadi:

Configure Akonadi to use the system-wide PostgreSQL:

Start Akonadi with akonadictl start, and check its status: akonadictl status.

SQLite

To use SQLite edit Akonadi configuration file to match the configuration below:

• When Akonadi starts, it will create the [QSQLITE3] section and set the appropriate variables in it.
• The database will be stored as ~/.local/share/akonadi/akonadi.db.

Disabling Akonadi

See this section in the KDE userbase.

KDE Telepathy

KDE Telepathy is a project with the goal to closely integrate Instant Messaging with the KDE desktop. It utilizes the Telepathy framework as a backend and is intended to replace Kopete.

To install all Telepathy protocols, install the telepathy group.To use the KDE Telepathy client, install the telepathy-kde-meta package that includes all the packages contained in the telepathy-kde group.

Use Telegram with KDE Telepathy

Telegram protocol is available using telepathy-haze, installing telegram-purple^AUR or telegram-purple-git^AUR and telepathy-morse-git^AUR. The username is the Telegram account telephone number (complete with the national prefix +xx, e.g. +49 for Germany).

The configuration through the GUI may be tricky: if the phone number is not accepted when configuring a new account in the KDE Telepathy client (with an error message complaining about an invalid parameter which prevents the account creation), insert it between single quotes and then remove the quotes manually from the configuration file (~/.local/share/telepathy/mission-control/accounts.cfg) after the account creation (if the quotes are not removed after, an authentication error should rise).

KDE Connect

KDE Connect provides several features to connect your Android phone with your Linux desktop:

• Share files and URLs to/from KDE from/to any app, without wires.
• Touchpad emulation: Use your phone screen as your computer's touchpad.
• Notifications sync (4.3+): Read your Android notifications from the desktop.
• Shared clipboard: copy and paste between your phone and your computer.
• Multimedia remote control: Use your phone as a remote for Linux media players.
• WiFi connection: no usb wire or bluetooth needed.
• RSA Encryption: your information is safe.

You will need to install KDE Connect both on your computer and on your Android. For PC side, installkdeconnect package. For Android side, install KDE Connect from Google Play or from F-Droid. If you want to browse your phone's filesystem, you need to installsshfs as well and configure filesystem exposes in your Android app.

It is possible to use KDE Connect even if you do not use the Plasma desktop. For desktop environments that use AppIndicators, such as Unity, install indicator-kdeconnect^AUR package as well. For GNOME users, better integration can be achieved by installing gnome-shell-extension-gsconnect^AUR instead of kdeconnect.

If you use a firewall, you need to open UDP and TCP ports 1714 through 1764. See https://community.kde.org/KDEConnect#Troubleshooting.

Tips and tricks

Use a different window manager

The component chooser settings in Plasma does not allow changing the window manager anymore. [7]In order to change the window manager used you need to set the KDEWMenvironment variable before KDE startup. [8] To do that you can create a script called set_window_manager.sh in ~/.config/plasma-workspace/env/ and export the KDEWM variable there. For example to use the i3 window manager :

And then make it executable :

KDE/Openbox session

The openbox package provides a session for using KDE with Openbox. To make use of this session, select KDE/Openbox from the display manager menu.

For those starting the session manually, add the following line to your xinit configuration:

Re-enabling compositing effects

When replacing Kwin with a window manager which does not provide a Compositor (such as Openbox), any desktop compositing effects e.g. transparency will be lost. In this case, install and run a separate Composite manager to provide the effects such as Xcompmgr or Compton.

Configuring monitor resolution / multiple monitors

To enable display resolution management and multiple monitors in Plasma, install kscreen. This provides additional options to System Settings > Display and Monitor.

Configuring ICC profiles

To enable ICC profiles in Plasma, installcolord-kde. This provides additional options to System Settings > Color Corrections.

ICC profiles can be imported using Add Profile.

Disable opening application launcher with Super key (Windows key)

To disable this feature you currently can run the following command:

Disable bookmarks showing in application menu

With Plasma Browser integration installed, KDE will show bookmarks in the application launcher.

To disable this feature you currently can run the following commands:

Troubleshooting

Fonts

Fonts in a Plasma session look poor

Try installing the ttf-dejavu and ttf-liberation packages.

After the installation, be sure to log out and back in. You should not have to modify anything in System Settings > Fonts. If you are using qt5ct, the settings in Qt5 Configuration Tool may override the font settings in System Settings.

If you have personally set up how your Fonts render, be aware that System Settings may alter their appearance. When you go System Settings > Fonts System Settings will likely alter your font configuration file (fonts.conf).

There is no way to prevent this, but, if you set the values to match your fonts.conf file, the expected font rendering will return (it will require you to restart your application or in a few cases restart your desktop). Note that Gnome's Font Preferences also does this.

Fonts are huge or seem disproportional

Try to force font DPI to 96 in System Settings > Fonts.

If that does not work, try setting the DPI directly in your Xorg configuration as documented in Xorg#Setting DPI manually.

Configuration related

Many problems in KDE are related to its configuration.

Plasma desktop behaves strangely

Plasma problems are usually caused by unstable Plasma widgets (colloquially called plasmoids) or Plasma themes. First, find which was the last widget or theme you had installed and disable or uninstall it.

So, if your desktop suddenly exhibits 'locking up', this is likely caused by a faulty installed widget. If you cannot remember which widget you installed before the problem began (sometimes it can be an irregular problem), try to track it down by removing each widget until the problem ceases. Then you can uninstall the widget, and file a bug report on the KDE bug trackeronly if it is an official widget. If it is not, it is recommended to find the entry on the KDE Store and inform the developer of that widget about the problem (detailing steps to reproduce, etc.).

If you cannot find the problem, but you do not want all the settings to be lost, navigate to ~/.config/ and run the following command:

This command will rename all Plasma related configuration files to *.bak (e.g. plasmarc.bak) of your user and when you will relogin into Plasma, you will have the default settings back. To undo that action, remove the .bak file extension. If you already have *.bak files, rename, move, or delete them first. It is highly recommended that you create regular backups anyway. See Synchronization and backup programs for a list of possible solutions.

Clean cache to resolve upgrade problems

The problem may be caused by old cache. Sometimes, after an upgrade, the old cache might introduce strange, hard to debug behaviour such as unkillable shells, hangs when changing various settings, Ark being unable to extract archives or Amarok not recognizing any of your music. This solution can also resolve problems with KDE and Qt applications looking bad after an update.

Rebuild the cache using the following commands:

Optionally, empty the ~/.cache/ folder contents, however, this will also clear the cache of other applications:

Volume control, notifications or multimedia keys do not work

Hiding certain items in the System Tray settings (e.g. Audio Volume, Media Player or Notifications) also disables related features. Hiding the Audio Volume disables volume control keys, Media Player disables multimedia keys (rewind, stop, pause) and hiding Notifications disables showing notifications.

Graphical problems

Make sure you have the proper driver for your GPU installed. See Xorg#Driver installation for more information. If you have an older card, it might help to #Disable desktop effects manually or automatically for defined applications or #Disable compositing.

Getting current state of KWin for support and debug purposes

This command prints out a summary of the current state of KWin including used options, used compositing backend and relevant OpenGL driver capabilities. See more on Martin's blog.

Disable desktop effects manually or automatically for defined applications

Plasma has desktop effects enabled by default and e.g. not every game will disable them automatically. You can disable desktop effects in System Settings > Desktop Behavior > Desktop Effects and you can toggle desktop effects with Alt+Shift+F12.

Additionally, you can create custom KWin rules to automatically disable/enable compositing when a certain application/window starts under System Settings > Window Management > Window Rules.

Enable transparency

If you use a transparent background without enabling the compositor, you will get the message:

In System Settings > Display and Monitor > Compositor, check Enable compositor on startup and restart Plasma.

Disable compositing

In System Settings > Display and Monitor > Compositor, uncheck Enable compositor on startup and restart Plasma.

Flickering in fullscreen when compositing is enabled

In System Settings > Display and Monitor > Compositor, uncheck Allow applications to block compositing. This may harm performance.

Screen tearing with NVIDIA

See NVIDIA/Troubleshooting#Avoid screen tearing in KDE (KWin).

Plasma cursor sometimes shown incorrectly

Create the directory ~/.icons/default and inside a file named index.theme with the following contents:

Execute the following command:

Unusable screen resolution set

Your local configuration settings for kscreen can override those set in xorg.conf. Look for kscreen configuration files in ~/.local/share/kscreen/ and check if mode is being set to a resolution that is not supported by your monitor.

Blurry icons in System tray

In order to add icons to tray, applications often make use of the library appindicator. If your icons are blurry, check which version of libappindicator you have installed. If you only have libappindicator-gtk2 installed, you can install libappindicator-gtk3 or libappindicator-sharp as an attempt to get clear icons.

Sound problems

No sound after suspend

If there is no sound after suspending and if KMix does not show audio devices which should be there, restarting plasmashell and pulseaudio may help:

Some applications may also need to be restarted in order for sound to play from them again.

MP3 files cannot be played when using the GStreamer Phonon backend

This can be solved by installing the GStreamer libav plugin (package gst-libav). If you still encounter problems, you can try changing the Phonon backend used by installing another such as phonon-qt4-vlc^AUR or phonon-qt5-vlc.

Then, make sure the backend is preferred via System Settings > Multimedia > Audio and Video > Backend.

Power management

No Suspend/Hibernate options

If your system is able to suspend or hibernate using systemd but do not have these options shown in KDE, make sure powerdevil is installed.

KMail

Clean Akonadi configuration to fix KMail

First, make sure that KMail is not running. Then backup configuration:

Start System Settings > Online Accounts and remove all the resources. Go back to Dolphin and remove the original ~/.local/share/akonadi/ and ~/.config/akonadi/ - the copies you made ensure that you can back-track if necessary.

Now go back to the System Settings and carefully add the necessary resources. You should see the resource reading in your mail folders. Then start Kontact/KMail to see if it works properly.

Empty IMAP inbox in KMail

For some IMAP accounts KMail will show the inbox as a top-level container (so it will not be possible to read messages there) with all other folders of this account inside.[9]. To solve this problem simply disable the server-side subscriptions in the KMail account settings.

Authorization error for EWS account in KMail

While setting up EWS account in KMail, you may keep getting errors about failed authorization even for valid and fully working credentials. This is likely caused by broken communication between KWallet and KMail. To workaround the issue set a passsword via qdbus:

Networking

Freezes when using Automount on a NFS volume

Using Fstab#Automount with systemd on a NFS volume may cause freezes, see bug report upstream.

Aggressive QXcbConnection journal logging

See Qt#Disable/Change Qt journal logging behaviour.

KF5/Qt 5 applications do not display icons in i3/FVWM/awesome

See Qt#Configuration of Qt5 apps under environments other than KDE Plasma.

Problems with saving credentials and persistently occurring KWallet dialogs

It is not recommended to turn off the KWallet password saving system in the user settings as it is required to save encrypted credentials like WiFi passphrases for each user. Persistently occuring KWallet dialogs can be the consequence of turning it off.

In case you find the dialogs to unlock the wallet annoying when applications want to access it, you can let the display managersSDDM and LightDM unlock the wallet at login automatically, see KDE Wallet#Unlock KDE Wallet automatically on login. The first wallet needs to be generated by KWallet (and not user-generated) in order to be usable for system program credentials.

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In case you want the wallet credentials not to be opened in memory for every application, you can restrict applications from accessing it with kwalletmanager in the KWallet settings.

If you do not care for credential encryption at all, you can simply leave the password forms blank when KWallet asks for the password while creating a wallet. In this case, applications can access passwords without having to unlock the wallet first.

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Discover does not show any applications

This can be solved by installing packagekit-qt5.

High CPU usage of kscreenlocker_greet with NVIDIA drivers

As described in KDE Bug 347772 NVIDIA OpenGL drivers and QML may not play well together with Qt 5. This may lead kscreenlocker_greet to high CPU usage after unlocking the session. To work around this issue, set the QSG_RENDERER_LOOPenvironment variable to basic.

Then kill previous instances of the greeter with killall kscreenlocker_greet.

OS error 22 when running Akonadi on ZFS

If your home directory is on a ZFS pool, create a ~/.config/akonadi/mysql-local.conf file with the following contents:

See MariaDB#OS error 22 when running on ZFS.

Some programs are unable to scroll when their windows are inactive

This is caused by the problematic way of GTK3 handling mouse scroll events. A workaround for this is to set environment variableGDK_CORE_DEVICE_EVENTS=1. However, this workaround also breaks touchpad smooth scrolling and touchscreen scrolling.

TeamViewer behaves slowly

When using TeamViewer, it may behave slowly if you use smooth animations (such as windows minimizing). See #Disable compositing as a workaround.

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See also

Arch Linux Install Tutorial