Dear Thom, Am Dienstag, 28. Februar 2017, 19:26:30 CET schrieb Thom Castermans: > Dear all, > > This is just for future reference and possibly to help others. > > Today I did an upgrade in testing and got, on a later boot, no SDDM login > screen. I saw error messages scrolling by before I got TTY9. The last ones > repeatedly said that SDDM was started and then stopped immediately. In the > logs (`/var/log/kern.log`), I found that SDDM said that `Display server > failed to start. Exiting`. > > I remembered and found in the APT logs that I had upgraded the kernel, but > saw that the NVIDIA kernel module was not recompiled, as it does normally. > Not sure why, maybe because it was a minor upgrade only? In any case, > reinstalling `nvidia-kernel-dkms` to trigger the recompile did the trick > for me: `aptitude reinstall nvidia-kernel-dkms`. The first time booting got > me a black screen for some reason, but the second boot (cold one this > time), I was greeted by SDDM again. I experienced the same problem. Executing “dkms autoinstall” fixed the problem for me (similar to your solution). So, this problem has nothing to do with KDE/Qt in Debian, but only with the proprietary NVIDIA drivers. Kind regards Benjamin > > Cheers, > Thom
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