Description of problem: If I leave my machine for a few hours and come back, when I unlock the screen my KDE desktop application title bars are not displayed. The rest of the window is present, and my KDE panel, but not the title bar. I also cannot move, minimize, or maximize windows and the last window that had focus is the only window I can interact with. I have to do Ctrl+Alt+F2, login, and then as root restart sddm.service or reboot the machine to get normal functionality. Version-Release number of selected component (if applicable): Not sure which KDE or Xorg or kernel component is responsible. How reproducible: Happened twice in 24 hours. Steps to Reproduce: 1. Log in to KDE desktop and open a few applications. 2. Lock screen and leave. 3. Unlock screen. Actual results: As described. Expected results: Normal desktop behavior. Additional info: I'm not sure if this is relevant, but I have a laptop in a docking station and external monitor. The onboard graphics are Nvidia NVS 5200M and I'm using the latest proprietary driver. (I had periodic hanging problems with the nouveau driver.) I looked through dmesg and used "journalctl -r" to examine the logs for errors, but if there was anything related to this problem I could not find it.
sounds like kwin crashed (often caused by video driver issues). For user logs, look in ~/.xsession-errors In the meantime, to workaround kwin missing you can try re-running it via krunner: ALT-F2: kwin --replace
I've done some more hunting about the error, and it may be related to this xorg bug: https://bugs.freedesktop.org/show_bug.cgi?id=91316 So rather than burn more time on it, maybe it makes sense to wait for the next xorg package release and see what changes. ALT-F2 kwin--replace got me a fresh desktop, thanks. Is that better than restarting the display manager, or just a different means to the same end?
Not sure what you mean by "restarting the display manager". kwin is the *window manager* here, if that helps. Otherwise, without a backtrace (or drkonqi/abrt report), it's hard to speculate on what's going wrong here.
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.