Re: I915 driver locks up

[Stephen Clark]

On 12/21/2010 11:16 AM, Stephen Clark wrote:
> On 12/19/2010 04:46 PM, Stephen Clark wrote:
> > On 12/19/2010 06:02 AM, Chris Wilson wrote:
> > > On Sat, 18 Dec 2010 18:32:49 -0500, Stephen 
> > > Clark<sclark46@xxxxxxxxxxxxx>  wrote:
> > > > I had been using mesa-7.9.
> > > > I loaded mesa-7.10 similar results. There is no
> > > >
> > > > /sys/kernel/debug/dri/0/i915_error_state
> > > >
> > > > In fact there is nothing in the /sys/kernel/debug directory. Do I have
> > > > to enable
> > > > something.
> > > You need to "mount -tdebugfs debug /sys/kernel/debug".
> > >
> > > > With the later kernel - things are worse X becomes totally useless 
> > > > it looks
> > > > like my lcd panel lost horizontal sync. With the 2.6.25 kernel X is
> > > > still usable
> > > > this makes me think at least some of the problem is kernel related.
> > > 2.6.25 to present marks the transition between UMS and KMS, i.e. moving
> > > of the userspace modesetting code into the kernel. And that should not
> > > have regressed. Can you please, grab an intel_reg_dumper of the working
> > > setup and the lost-sync setup, and include a drm.debug=0xe dmesg 
> > > (i.e. add
> > > drm.debug=0xe to your boot commandline)?
> > >
> > > > With 2.6.37-rc6 and mesa 7.10 with hardware acceleration turned off 
> > > > in wine-
> > > >
> > > > Dec 18 18:01:50 joker4 yum[5244]: Updated: 
> > > > mesa-libGL-7.10-0.17.fc15.x86_64
> > > > Dec 18 18:01:52 joker4 yum[5244]: Updated: 
> > > > mesa-libGL-7.10-0.17.fc15.i686
> > > > Dec 18 18:01:54 joker4 yum[5244]: Updated: 
> > > > mesa-libGLU-7.10-0.17.fc15.x86_64
> > > > Dec 18 18:02:02 joker4 yum[5244]: Updated: 
> > > > mesa-dri-drivers-7.10-0.17.fc15.x86_6
> > > > 4
> > > > Dec 18 18:02:03 joker4 yum[5244]: Updated: 
> > > > mesa-libGLU-7.10-0.17.fc15.i686
> > > > Dec 18 18:02:11 joker4 yum[5244]: Updated: 
> > > > mesa-dri-drivers-7.10-0.17.fc15.i686
> > > Good, those drivers are recent enough that I should be able to use the
> > > error state to find the broken code.
> > > -Chris
> > Hi Chris,
> >
> > I emailed the information you requested, it was quite large, and 
> > haven't seen it show up on
> > LKML yet. Don't know if it is being blocked by the ML or not.
> >
> > Regards,
> > Steve
> Hi Chris,
>
> Just wondering if you received what you needed from me. I still have 
> the info
> for the 2.6.37rc6 kernel that I haven't sent awaiting some kind of 
> acknowledgment that
> you received the initial info I send for the 2.6.35 kernel.
>
> Steve
Hi Chris,

Just wanted to say I downloaded the latest drm_fixes from Dave Airlie 
and tried them
on 2.6.37rc7 and got the same gpu hang with the screen tearing 
horizontally. I have
the the intel gpu dump and a cat of the i915_error_state. Together they 
are over
2 megabytes. Should I send them to you directly since they seem to big 
for the mailing
list.

Regards,
Steve

--

"They that give up essential liberty to obtain temporary safety,
deserve neither liberty nor safety."  (Ben Franklin)

"The course of history shows that as a government grows, liberty
decreases."  (Thomas Jefferson)



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