Fix Wayland icons of apps after switching to KDE & Wayland [Ubuntu 24.04]

FixIconsOnWayland.md

Fix Wayland icons of apps after switching to KDE & Wayland [Ubuntu 24.04]

Description

After switching to Wayland some apps have default Wayland icon:

Example setup for Firefox

The solution is to setup proper .desktop file name for windows of these apps.

1. Find the proper name of Firefox .desktop file:

$ find ~ -iname *firefox*.desktop

~/.local/share/applications/firefox_firefox.desktop

2. Setup KDE window rule.

Open System Settings -> Window Management -> Window Rules.

Click + Add New... and set the parameters:

• Window class (application) -> Exact Match, enter firefox
• Match whole window class -> Yes
• Click + Add Property... -> Select Desktop file name and enter name of .desktop file, e.g. firefox_firefox.desktop in the example above.

Alternatvelly one can use the WaylandDesktopFile.kwinrule file provided. In the Window Rules dialog click Import... and set the actual .desktop file name afterwards.

Links

• https://old.reddit.com/r/kde/comments/15m2aak/after_switching_slack_firefox_to_use_wayland/
• https://imgur.com/3yb0g0j

WaylandDesktopFile.kwinrule

[Firefox icon]
Description=Firefox icon
desktopfile=firefox_firefox.desktop
desktopfilerule=3
wmclass=firefox
wmclasscomplete=true
wmclassmatch=2