linux-kernel - Re: [Bug #12765] i915 VT switch with AIGLX causes X lock up

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Date:	Mon, 27 Apr 2009 23:07:02 +0100
From:	Sitsofe Wheeler <sitsofe@...oo.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Dave Airlie <airlied@...hat.com>,
	DRI <dri-devel@...ts.sourceforge.net>,
	Michel Dänzer <michel@...nzer.net>
Subject: Re: [Bug #12765] i915 VT switch with AIGLX causes X lock up

On Mon, Apr 27, 2009 at 09:46:51AM -0700, Jesse Barnes wrote:
> On Sun, 26 Apr 2009 11:46:26 +0200 (CEST)
> "Rafael J. Wysocki" <rjw@...k.pl> wrote:
> 
> > This message has been generated automatically as a part of a report
> > of regressions introduced between 2.6.28 and 2.6.29.
> > 
> > The following bug entry is on the current list of known regressions
> > introduced between 2.6.28 and 2.6.29.  Please verify if it still
> > should be listed and let me know (either way).

The problem is still here in 2.6.29-rc3.

> I think we had a workaround for this (attached), but it sounds like
> Robert has tracked down the root cause (search for "Broken vblanks on
> Intel" on dri-devel@...ts.sourceforge.net).  Will try to get the fix

http://www.mail-archive.com/dri-devel@lists.sourceforge.net/msg39370.html
seems to be it.

> into the Intel driver soon.  Fortunately this doesn't seem to be biting
> a lot of people (at least not that I've heard); I certainly have a hard
> time reproducing it.

The patch that was attached to Jesse's mail seems to resolve the
problem...

-- 
Sitsofe | http://sucs.org/~sits/
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