[Intel-gfx] 3.16.0: [drm:i915_gem_init] *ERROR* Failed to initialize GPU, declaring it wedged

[Chris Wilson]

On Fri, Aug 08, 2014 at 04:09:30PM +0200, Luuk van der Duim wrote:
> Daniel Vetter schreef op vr 08-08-2014 om 11:47 [+0200]:
> > Re-adding mailing lists, please don't drop ccs like that.
> 
> I sincerely apologize. I seriously have no idea why I assumed a dance
> for two.
> 
> > 
> > 
> > On Fri, Aug 8, 2014 at 11:45 AM, Luuk van der Duim
> > <luukvanderduim at gmail.com> wrote:
> > >
> > > I'll be happy to test your duct-tape. ;)
> > > What branch do I need  to pull? (what is its git location address?)
> > 
> > git://anongit.freedesktop.org/drm-intel drm-intel-fixes
> > 
> > Cheers, Daniel
> 
> Applied it to a fresh clone of Linus' current git-tree. (the bisecting
> seems to have altered the tree. git bisect reset did not return a clean
> tree(?). I have yet to understand most of gits magic.)
> 
> luuk at Uruburu2:~$ uname -a 
> Linux Uruburu2 3.16.0-drm-fixes-08720-gbd68988 #1 SMP PREEMPT Fri Aug 8
> 15:10:52 CEST 2014 x86_64 GNU/Linux
> luuk at Uruburu2
> 
> luuk at Uruburu2:~$ dmesg | grep i915
> [    0.621044] i915 0000:00:02.0: irq 45 for MSI/MSI-X
> [    0.730160] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
> [    0.730161] i915 0000:00:02.0: registered panic notifier
> [    0.733062] [drm] Initialized i915 1.6.0 20140725 for 0000:00:02.0 on
> minor 0
> [   75.618392] chrome[3488]: segfault at 8 ip 00007f16b9a05e73 sp
> 00007fff0b6951e0 error 4 in i915_dri.so[7f16b9772000+4fd000]
> 
> As you can see, initialization went fine and, as a consequence, the
> desktop zoom works fine too. Good!
> 
> The segfault of a chrome, I don't know, I am using xorg-video-intel
> driver from the the experimental repository: 2.99.914-1

It's i915_dri.so from mesa that is broken. It is trying to use DRI3 and
dies. But the easiest way is probably just to disable DRI3 with

Section "Device"
  Identifier "intel"
  Option "DRI" "2"
EndSection

in xorg.conf (or /etc/X11/xorg.conf.d/intel.conf)
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre