[Bug 65496] [HSW] resume from s4 sporadically causes call trace and system hang, with warm boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=65496

--- Comment #43 from Ben Widawsky <ben at bwidawsk.net> ---
(In reply to comment #42)
> Created attachment 87366 [details]
> netconsole  grab information
> 
> (In reply to comment #41)
> > (In reply to comment #39)
> > > (In reply to comment #37)
> > > > Hi
> > > > 
> > > > Can you please try the patches from comments 22 and 23 form bug
> > > > https://bugzilla.kernel.org/show_bug.cgi?id=59321 ?
> > > > 
> > > > Thanks,
> > > > Paulo
> > > 
> > > Addition: 
> > > ------------------
> > > No matter patches from comment 22 only or with 23, I find my HSW Desktop
> > > failed to suspend from S4, I saw indicator light output is 0004, and the fan
> > > isn't stop. I also tried the latest -next-queued without patches, it can
> > > resume but with call trace and hang at first round.
> > 
> > Can you please push the branch you tested somewhere so I can confirm the
> > patches are indeed correct.
> > 
> 
> Oh, all my tests are based on -next-queued latest and the patches also
> applied on it.
> 
> The commit be used yesterday:
> --------------------
> commit a94b013b91de055572183c6772865123fa955027
> Author: Paulo Zanoni <paulo.r.zanoni at intel.com>
> Date:   Thu Sep 19 17:03:06 2013 -0300
> 
>     drm/i915: wait for IPS_ENABLE when enabling IPS
> 
>     At the end of haswell_crtc_enable we have an intel_wait_for_vblank
>     with a big comment, and the message suggests it's a workaround for
>     something we don't really understand. So I removed that wait and
>     started getting HW state readout error messages saying that the IPS
>     state is not what we expected.
> 
> 
> 

Can you please get me a link to the code which you've tested so I can make sure
it was applied correctly. This patch fixes the issue for others, so it's
surprising it doesn't fix it for you.

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