linux-kernel - Re: 2.6.33-rc8 regression on i915: resume from hibernate locks up every 2nd time

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Message-ID: <4B7C709B.2060809@crca.org.au>
Date:	Thu, 18 Feb 2010 09:41:31 +1100
From:	Nigel Cunningham <ncunningham@...a.org.au>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Pedro Ribeiro <pedrib@...il.com>, linux-kernel@...r.kernel.org,
	dri-devel@...ts.sourceforge.net
Subject: Re: 2.6.33-rc8 regression on i915: resume from hibernate locks up
 every 2nd time

Hi Rafael.

Rafael J. Wysocki wrote:
> On Wednesday 17 February 2010, Pedro Ribeiro wrote:
>> 2010/2/17 Rafael J. Wysocki <rjw@...k.pl>:
>>> On Wednesday 17 February 2010, Rafael J. Wysocki wrote:
>>>> On Wednesday 17 February 2010, Pedro Ribeiro wrote:
>>>>> Hi,
>>>>>
>>>>> commit 84b79f8d2882b0a84330c04839ed4d3cefd2ff77 (drm/i915: Fix crash
>>>>> while aborting hibernation) introduced two new issues which were not
>>>>> present in 2.6.33-rc7:
>>>>>
>>>>> - every second resume from hibernate results in a blank screen
>>>>> - the annoying flash at the end of atomic copy/restore during the
>>>>> hibernate process is back (present in kernels < 2.6.33)
>>>>>
>>>>> The first issue is serious, the second is just an annoyance.
>>>> The second one is an expected price of fixing the aborted hibernation
>>>> regression.
>>>>
>>>> The first one shouldn't happen, though.
>>>>
>>>> I'll see if I can reproduce that locally.
>>> No, I can't.
>>>
>>> Is the driver compiled directly into the kernel or modular?
>> The driver is modular.
>> And sorry, I forgot to tell you I'm using TuxOnIce, it certainly makes
>> a difference.
> 
> It shouldn't in fact, although I'm not sure.

You're right. It shouldn't. I'm using exactly the same driver model
calls in exactly the same order, and not changing driver code at all.

Regards,

Nigel
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