linux-kernel - Re: Lenovo resume from suspends hangs in i915_gpu

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Date:	Sat, 2 Apr 2011 09:24:10 +0900
From:	Norbert Preining <preining@...ic.at>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	linux-acpi@...r.kernel.org
Subject: Re: Lenovo resume from suspends hangs in i915_gpu_busy or so

On Fr, 01 Apr 2011, Jesse Barnes wrote:
> > Copyied from screen:
> > Process ips-adjust (....
> > Stack:
> >   ....
> >    ....
> >   ...
> > Call Trace:
> >   <IRQ>
> >   ... ? tick_program_event
> >   call_sortirq
> >   do_softirq
> >   irq_exit
> >   smp_apic_timer_interrupt
> >   apic_timer_interrupt
> >   <EOI>
> >   ? _raw_spin_lock
> >   i915_gpu_busy
> >   ips_adjust
> >   ? show_cpu_temp
> >   kthread
> >   kernel_thread_helper
> >   ? kthread_worker_fn
> >   ? gs_change
> > Code: ...
> > (once more more or less the same as above)
> 
> Hm, ok so on resume we're checking GPU busyness, which is normal, but
> end up hanging on the spinlock?  Do you see what scrolls by above the
> text you took a picture of (probably a "task hung" message?).

More than what I can see on the screen shot I cannot grasp.

> Does this happen reliably?  Does a previous kernel work ok?

Reliable: yes
Previous: I don't know, but I can try out some older git release.
   which one do you suggest?
  (I got the laptop recently so I don't have a long history with that one)

Best wishes

Norbert
------------------------------------------------------------------------
Norbert Preining            preining@...ist.ac.jp, logic.at, debian.org}
JAIST, Japan                                 TeX Live & Debian Developer
DSA: 0x09C5B094   fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
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