linux-kernel - Re: [Bug #11947] 2.6.28-rc VC switching with Intel graphics broken

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Date:	Mon, 24 Nov 2008 20:13:07 +0100
From:	Bernhard Schmidt <berni@...kenwald.de>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
CC:	"Romano Giannetti (lists)" <romanol@...omillas.es>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Andreas Mohr <andi@...as.de>,
	devsk <kernel-bugs.dev1world@...mgourmet.com>,
	Johan Bilien <jobi@....ecp.fr>
Subject: Re: [Bug #11947] 2.6.28-rc VC switching with Intel graphics broken

Hello,

> On Monday, November 24, 2008 12:47 am Romano Giannetti (lists) wrote:
>> Rafael J. Wysocki wrote:
>>> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11947
>>> Subject		: 2.6.28-rc VC switching with Intel graphics broken
>>> Submitter	: Romano Giannetti <romano.giannetti@...il.com>
>>> Date		: 2008-11-03 12:10 (20 days old)
>>> Handled-By	: Jesse Barnes <jbarnes@...tuousgeek.org>
>> Still with us on -rc6, nasty, reproducible, no clues on what can be.
>>
>> VC switch locks or delay the systems minutes, resuming from suspend locks
>> hard the machine.
>>
>> 2.6.28-rc is unusable here.
>>
>> Jesse, any hints? My suspicion that it can be the same thing happened with
>> bug 10620 is wrong? (It was a very similar error about vblank...)
> 
> Just added to the bug, it looks like a DUP of an issue Keith just fixed last 
> week (now to make sure the patch makes it upstream quickly).

I can confirm that, with the patch from 
http://lists.freedesktop.org/archives/intel-gfx/2008-November/000614.html 
applied on top of current git head (rejected hunk in 
drivers/gpu/drm/i915/915_irq.c due to the additional 
dev_priv->irq_mask_reg = ~0; in git between the removed lines, I kept 
it) I can suspend/resume and do a VC switch again.

Big thanks!

Bernhard
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