linux-kernel - Re: [bisected] i915 regression in post 2.6.36 kernels

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Date:	Fri, 12 Nov 2010 19:20:46 +0100
From:	Florian Mickler <florian@...kler.org>
To:	Johannes Hirte <johannes.hirte@....tu-ilmenau.de>
Cc:	Chris Wilson <chris@...is-wilson.co.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [bisected] i915 regression in post 2.6.36 kernels

On Wed, 10 Nov 2010 23:39:35 +0100
Johannes Hirte <johannes.hirte@....tu-ilmenau.de> wrote:

> On Wednesday 10 November 2010 08:46:40 Chris Wilson wrote:
> > On Wed, 10 Nov 2010 08:02:19 +0100, Johannes Hirte <johannes.hirte@....tu-ilmenau.de> wrote:
> > > With the latest kernel, I don't get any windows in KDE displayed. After
> > > starting kdm, I get the background picture and the mouse cursor but not the
> > > login window. I can login blindly and a ps on console shows me that the
> > > expected KDE processes are started but still nothing is displayed. 
> > > I've bisected this to:
> > > 
> > > 5c12a07e8073295ce8b57a822f811ac34e4f8420 is the first bad commit
> > > commit 5c12a07e8073295ce8b57a822f811ac34e4f8420
> > > Author: Chris Wilson <chris@...is-wilson.co.uk>
> > > Date:   Wed Sep 22 11:22:30 2010 +0100
> > > 
> > >     drm/i915: Drop ring->lazy_request
> > >     
> > >     We are not currently using it as intended, so remove the complication.
> > > 
> > >     Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
> > 
> > May I ask you to recheck your bisection, since that was later reverted.
> > -Chris
> 
> Did so. I've started with v2.6.36 for bisect good and 
> f6614b7bb405a9b35dd28baea989a749492c46b2 for bisect bad (was HEAD) in this
> case. Again I ended in 5c12a07e8073295ce8b57a822f811ac34e4f8420 as the first
> bad commit. The regression was introduced there, as the commit before is fine.
> If it was reverted, the regression should be fixed by this. But I don't find
> neither the fix/revert nor the reintroduction of the regression.
> 
> regrards,
>   Johannes

The revert is a56ba56c275b1c2b982c8901ab92bf5a0fd0b757 .

Regards,
Flo
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