I have sorted this out by using the following from another post: sudo service sddm stop sudo apt remove libqt5quick5-gles sudo apt install libqt5quick5 sudo service sddm start
For me, when removing libqt5quick5-gles, libqt5quick5 was automatically install, so line 3 wasn't needed. Not sure why it was installed in the first place... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1920130 Title: System icons missing in kubuntu 21.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1920130/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs