direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile
Ok, OpenGL seems to work in general.
But the intel driver is known to be buggy and cause problems, on some systems at least. (there hasn’t been a stable release since years)
It may help to disable SNA and switch to the older UXA acceleration:
Or try to use the “modesetting” driver instead, e.g. by uninstalling xf86-video-intel. (will still use 2D and 3D hardware acceleration, and is even reported to have better performance for some users)
Yes, the configurations in ~/.config/kwinrc are set as they was previously, with all virtual desktop’s names etc.
Ok, that kwinrc looks fine and should give you your virtual desktops.
But just for clarification: if kwin crashes, you won’t be able to switch virtual desktops either.
But if it crashes, there won’t be any window decorations, so you won’t be able to move/resize windows.
Is this the case?
You can restart it via “kwin_x11 --replace” (as user).
Does that help?
(but if it really crashes in the first place, it may just as well crash again)
So, in the case ~/.config/kwinrc got corrupted how do I manually set it to work with XRender in order to test for example if it is a problem with OpenGL?
Yes, that would switch from OpenGL to XRender.
Or set Enabled=false to disable compositing completely (but that would really disable all desktop effects).