linux-kernel - Re: 2.6.35-rc6+: i915: Bisected regression

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Message-ID: <20100801151409.252be86b@tux.DEF.witbe.net>
Date:	Sun, 1 Aug 2010 15:14:09 +0200
From:	Paul Rolland <rol@...917.net>
To:	Thomas Meyer <thomas@...3r.de>
Cc:	Stefan Richter <stefanr@...6.in-berlin.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Zou Nan hai <nanhai.zou@...el.com>,
	Xiang Hai hao <haihao.xiang@...el.com>,
	Eric Anholt <eric@...olt.net>, David Airlie <airlied@...ux.ie>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
Subject: Re: 2.6.35-rc6+: i915: Bisected regression

Hello Thomas,

On Sun, 1 Aug 2010 12:51:36 +0200
Thomas Meyer <thomas@...3r.de> wrote:

> Am 01.08.2010 um 13:42 schrieb Stefan Richter <stefanr@...6.in-berlin.de>:
> 
> > Thomas, on what hardware did you observe the regression?
> 
> Is a Intel mobile express gm45 chipset.

My machine has :
00:02.0 0300: 8086:2a42 (rev 07)
00:02.1 0380: 8086:2a43 (rev 07)

00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)

(Dell Vostro 1520, BIOS Revision A04)

> >  Is it suspend
> > or resume that is unreliable?
> suspend never finishes/hangs.
and is randomly suffering from exactly the same problems...

So, I've applied your hint (in i915_drv.h), rebuilt a kernel, booted, and
I've now successfully managed to go thru several suspend/resume cycles
without having the machine hanging while suspend !

Will check in the long term, but so far, it's a win !

Thx,
Paul

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