Hi David! On Tue, 26 Nov 2019 at 21:03, David Engel <da...@istwok.net> wrote: > > Package: libqt5core5a > Version: 5.12.5+dfsg-2 > Severity: important > > Dear Maintainer, > > I had not rebooted my Deiban/testing system since mid-October. When I > did, my KDE session was unustable. After entering my password into > sddm, the screen began flashing wildly with my restored session > windows visible between the flashes. The end result was a mish-mash > of the KDE login animation and my restored windows and a system that > was unresponsive to keyboard input and mouse clicks. > > After much trial and error and several system restores from backups, I > narrowed the problem down to upgrading from qt version 5.11.3+dsfg1-3 > to version 5.12.5+dsfg-2. I suppose there is a slight chance that the > latest versions of libkf5xmlgui and plasma-integration are also to > blame since the qt upgrade forced them to be upgraded too. > > I'm currently forced to use XFCE since KDE is unusable. > Interestingly, KDE programs like konsole and dolphin show no ill > effects when run under XFCE. The mythtv installation I build myself > and uses Qt and OpenGL also works fine. > > The problem does not appear to have anything to do with my personal > KDE configuration. I created a dummy user with no existing > configuration and the problem still occurred. > > Finally, the problem does not occur on another system that I maintain > which uses the nvidia-legacy-390xx graphics driver. Perhaps the > problem is related to something in the intel graphics driver on this > old, Ivy Bridge system. > > Please let me know if there is any other information you want me to > provide like logs or things you want me to try.
This really sounds like a video issue. So far we did not receive any other complain in this regard. Try checking /var/log/Xorg.log.0 (after trying to start KDE) for possible issues.