[Bug 83422] i was opening systemsettings, chose workspace design and the default look and feel screen just stays black when resizing the window or chosing another option on the left panel, it crashes

https://bugs.freedesktop.org/show_bug.cgi?id=83422

--- Comment #7 from Michel Dänzer michel@daenzer.net --- (In reply to comment #6)

my xorg.conf is empty. if i add your lines the complete screen turns black the next time i login making kubuntu unusable.

Sounds like you didn't create a valid xorg.conf. Something like this should work:

Section "Device" Identifier "default" Option "AccelMethod" "glamor" EndSection

or is this update available through the update center?

No idea, but there are PPAs.