prevent calling xrandr w/o extension available
Review Request #125074 - Created Sept. 6, 2015 and submitted
summarized, X11 protocol violation
"we deal the bug, ..." ;-)
GL compositing fails, xrender is a mess. 0x0 screen probably doesn't help. => Should we somehow resort to QDesktopWidget::size()?
disabled randr extension and restarted X11
kwin crashes w/o patch - "works" with patch applied