Created attachment 36638 [details]
After booting with KMS enabled my laptop screen turns black as soon as X starts, while my external screen continues to work. The desktop still expands to both screens. If I disconnect the external monitor everything runs smooth, I can even connect the monitor afterwars and enable it through xrandr. But the laptop screen turns black again when I run glxgears through Gallium. I can turn the black screen off and on through xrandr, but it stays black.
With KMS disabled everything works fine. I rebuild my graphic stack from git but the problem remained. The error first occured months ago, so I disabled KMS. Today I tried it again and the error is still there.
dri2proto, glproto, libdrm, xf86-video-ati, libgl + mesa + ati-dri from git 2010-06-30
Ati Radeon Mobility x1700
Created attachment 36641 [details]
Created attachment 36642 [details]
*** This bug has been marked as a duplicate of bug 27744 ***