Comment # 19 on bug 1208904 from Tony Mechelynck

Created attachment 865286 [details]
/var/log/Xorg.0.log after setting resolution to 1280x960 then logout/login to
X11

This is the fresh Xorg.0.log promised in comment #18, obtained after the
procedure described therein. After logging out of X, the "normal" graphical
login prompt appeared. The xrandr modeset log will be attached shortly. Then
I'll undo my "temporary solution" described in comment #0.

Thanks a lot Stefan: even though nothing was changed in the distribution, I
couldn't have found out without help how to fix it on my side.