I'm not sure this will help, but I have found similar errors in a recent post on a German debian forum, and also on a German OpenSuSE forum linking it to Xorg and a workaround being used (apparently with succes) is to add the following to the extensions section of xorg.conf:
Code:
Section "Extensions"
Option "MIT-SHM" "no"
EndSection
However, I honestly have no idea whether this will work in your case. But I think there's no harm in trying it out, until someone else suggests a better option of course.