Created attachment 110206 [details] gdb backtrace When starting System Settings a crash occurs every time. This was apparently caused by a recent update (4.11.5-0neon+16.04+xenial+build57). Was working prior. Was told in IRC to file upstream. Quick konsole output: https://paste.kde.org/pkbxsybmv Quick syslog entry: Jan 29 08:24:05 kernel: [62923.899131] systemsettings5[24340]: segfault at 62956bc ip 00007f5cfdd5f84e sp 00007ffcd92647d8 error 4 in libc-2.23.so[7f5cfdcc0000+1c0000] Full gdb backtrace attached. Full gdb backtrace attached.
Feel free to mark as invalid: It turns out this bug was caused by a Mesa 3.0 RC2 bug for AMD cards that actually affects a lot of Plasma and Qt apps: https://bugzilla.freedesktop.org/show_bug.cgi?id=104806 Downgrading Mesa solved the issue.
Mesa 18 bug.