KWin is the default window manager (WM) in Plasma and has lot of features, but it only supports floating windows. Plasma lets you use another window manager, such as i3, bspwm or any other tilling window manager.
Most window managers require few, if any, changes to their configuration files.
Some considerations to be aware of when using another window manager:
- Tiling window managers may have problems with components like panels. For some configurations, certain options will help alleviate issues
- Most window managers do not have their own compositors, and therefore lack features like animations and transparency. If such effects are desired, a compositor such as compton is required
Using Another Window Manager with Plasma
Single User: Using System Settings
This is the simplest method, but only affects the user for which it is added.
- Create a shell script (kde-i3.sh as an example), containing the following
#!/bin/sh export KDEWM=/usr/bin/i3
Replace /usr/bin/i3 with the path to the window manager desired.
- Start System Settings
- Select Startup and Shutdown
- Select Autostart
- Click the Add script button below the list
- Enter the location of the script created earlier, or use the folder icon to use a dialog to find it. Click OK, the script will be added to the list
- In the Run On column, select Before Session Startup from the drop down list
- The chosen window manager will be used the next time you log in
System Wide: Adding an XSession
If superuser (root) access is available, a new session file for X.org can be created.
This has several advantages: the alternate session is available to all users of the system, and changing back to KWin is as simple as logging out and back in.
To add a session for an alternate window manager as superuser:
- Copy the existing Plasma session file
cp plasma.desktop plasma-i3.desktop
- Using a text editor, open the file and change the Exec line, and optionally the Description
[Desktop Entry] Type=XSession Exec=env KDEWM=/usr/bin/i3 DesktopNames=KDE Name=Plasma (i3) Comment=Plasma by KDE w/i3 X-KDE-PluginInfo-Version=5.14.4
- The display manager must be restarted, most easily by rebooting
Before starting the configuration, you should make sure i3 or i3-gaps are installed on your system. If they are not, use your package manager or Discover to install one of these two packages. You should also install a compositor such as "compton", since unlike KWin, i3 doesn't ship with an integrated compositor.
Create a default i3 configuration
.config/i3/config), you can skip this step.
Open a console and type
i3-config-wizard. This command opens a small window that will help you create a configuration file.
Some i3 window rules help you to have notifications and some other plasma windows as floating windows:
for_window [title="Desktop — Plasma"] kill; floating enable; border none for_window [class="plasmashell"] floating enable; for_window [class="Plasma"] floating enable; border none for_window [title="plasma-desktop"] floating enable; border none for_window [title="win7"] floating enable; border none for_window [class="krunner"] floating enable; border none for_window [class="Kmix"] floating enable; border none for_window [class="Klipper"] floating enable; border none for_window [class="Plasmoidviewer"] floating enable; border none for_window [class="(?i)*nextcloud*"] floating disable for_window [class="plasmashell" window_type="notification"] floating enable, border none, move right 700px, move down 450px, no_focus
For the most part, bspwm requires little additional configuration.
- A single Plasma panel, in most cases, is detected properly and bspwm will not place windows in its space. If the panel ends up presenting a problem, or when using multiple panels, the following may be added to .bspwmrc
bspc config top_padding sizewhere size is the size of the panel in pixels. Also valid are bottom_padding, left_padding, and right_padding. As many of these directives may be used as necessary for multiple panels.
Hints and Tips
You can open some Plasma components with DBus commands. So you can map keybinding to these DBus commands. To find a specific DBus command, you can look at QDbusViewer.
- Open Krunner
qdbus org.kde.kglobalaccel /component/krunner org.kde.kglobalaccel.Component.invokeShortcut 'run command'
- Open logout confirmation screen
qdbus org.kde.ksmserver /KSMServer org.kde.KSMServerInterface.logout -1 -1 -1
For i3, you can map a keybinding with the bindsym command. Example:
bindsym $mod+Shift+e exec <command>
For Bspwn, you need to use the
bspc program. See Arch Linux wiki for more information.
- Window managers (Wikipedia)
- Window managers (Arch Linux wiki)
- Desktop environment (Wikipedia)
- Desktop environment (Arch Linux wiki)