Comment 366 for bug 541511

(In reply to comment #215)
> René Gabriëls: Did you happen to come across something regarding the mouse
> cursor mysteriously being on strike? Upgraded drm-intel-next kernel/v9 patch
> and userspace drivers (xf86-video-intel/libdrm) to git head and ran into the
> same problem (I assume the problem is somewhere in kernel code, as going back
> to 2.6.34 brings back the cursor).

Yes. I tracked down the problem: if you comment the following lines in drivers/gpu/drm/intel_display.c the problem will probably be gone (it worked for me).

/* 855 & before need to leave pipe A & dpll A up */
{ 0x3582, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
{ 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },

> Also +1 to GPU hanging, but couldn't find any flush-related messages in dmesg,
> so I assume I'm simply running into some other problem once again. Much to my
> delight I also noticed that the intel driver now seems to fall back to software
> rendering when the GPU is hung, so at least I can still work without everything
> going down the drain. Very nice work.

My system locks up hard when I fullscreen certain video/gl apps. Also I have render errors with progressively rendered images in Firefox. It's hard to stay optimistic about the state of the Linux desktop considering that graphics has never really worked as it should since the day I bought it (almost 7 years ago!).