Created attachment 145932 [details] Missing Window decorations as well as missing decorations in global menu. In a new bizarre glitch I have never seen in KDE Plasma on Ubuntu Studio 21.04 when starting Ubuntu Studio all of the window decorations were missing, and the only one's that seem to work is the integrated Breeze theme. This is more or a nuisance than anything. It also is missing from global themes as well.
This means the KWin window manager crashed and failed to launch again. You can manually getting it back by using KRunner to launch it. To do this, use the Alt+Space keyboard shortcut to show KRunner, then type "kwin_x11" and hit the enter or return key. After that, we'll need a backtrace of the crash that took out KWin. You can find it using the `coredumpctl` command line utility. Instructions for using it can be found here: https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports#Retrieving_a_backtrace_using_coredumpctl Can you attach that backtrace? Thanks!
(In reply to Nate Graham from comment #1) > This means the KWin window manager crashed and failed to launch again. > > You can manually getting it back by using KRunner to launch it. To do this, > use the Alt+Space keyboard shortcut to show KRunner, then type "kwin_x11" > and hit the enter or return key. > > After that, we'll need a backtrace of the crash that took out KWin. You can > find it using the `coredumpctl` command line utility. Instructions for using > it can be found here: > https://community.kde.org/Guidelines_and_HOWTOs/Debugging/ > How_to_create_useful_crash_reports#Retrieving_a_backtrace_using_coredumpctl > > Can you attach that backtrace? Thanks! I tried that and it didn't work, I honestly think it was a result of a conflict between the Studio session and the previously installed Kubuntu desktop. An upgrade to 21.10 fixed the issue.