https://bugs.kde.org/show_bug.cgi?id=396000
Bug ID: 396000 Summary: Loosing title bars on windows, Compositor seems to be the bad guy Product: kde Version: unspecified Platform: Kubuntu Packages OS: Linux Status: UNCONFIRMED Keywords: multiscreen Severity: normal Priority: NOR Component: general Assignee: unassigned-b...@kde.org Reporter: joe.zw...@t-online.de CC: joe.zw...@t-online.de Depends on: 310682 Target Milestone: --- I hope this is the right "slot" for my specific bug: I am using Kubuntu 18.04 LTS on an AMD x46 with 8 cores, NVIDIA VGA compatible controller: NVIDIA Corporation GP106 [GeForce GTX 1060 6GB] (rev a1) with proprietary driver v390. I also used the nouveau driver with same result. Maybe it is important for the bug to know that I use two 4K monitors. When i arrange for 4 virtual desktops and switch between the desktops frequently, suddenly all open windows appear on one desktop, and all windows lost their title bar, so I cannot move them anymore. It also is not possible to switch desktops again. Only remedy was so far to reboot until everything started all over again. It seems that I now found the cause (without knowing why): if i disable the "start compositor on system startup" button in "Settings"->Monitors->Compositor the problem does not reappear. I just tried again to turn it on again, and after reboot - voila, I lost the title bars again! Very reproducible... Hope I could help with a constructive bug report - Joe Referenced Bugs: https://bugs.kde.org/show_bug.cgi?id=310682 [Bug 310682] Modular workflow compositor -- You are receiving this mail because: You are watching all bug changes.