linux-kernel - Re: Linux 2.6.37

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Message-ID: <20110111173741.GA3988@tiehlicka.suse.cz>
Date:	Tue, 11 Jan 2011 18:37:41 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	dri-devel@...ts.freedesktop.org, indan@....nu
Subject: Re: Linux 2.6.37

On Tue 11-01-11 18:17:44, Michal Hocko wrote:
> [Let's CC Indan - author of the bugzilla patches]
> 
> On Thu 06-01-11 11:48:16, Michal Hocko wrote:
> > Hi,
> > 
> > On Tue 04-01-11 17:15:45, Linus Torvalds wrote:
> > [...]
> > > We did have another revert to fix hopefullythe last "blank screen"
> > > regression on intel graphics.
> > 
> > It seems that there is still a regression for intel graphic cards
> > backlight. One report is https://bugzilla.kernel.org/show_bug.cgi?id=22672.
> > I can reproduce the problem easily by:
> > xset dpms force standby; sleep 3s; xset dpms force on
> > 
> > backlight doesn't get up (there is really dark picture though which
> > doesn't get brighter by function keys which work normally) after dpms on
> > until I close and open lid. 
> > 
> > The problem wasn't present in 2.6.36
> 
> I can confirm that this problem is not present if both patches from
> bko#22672 are applied on top of 2.6.37 kernel.
> I haven't tried both patches separately, but I can surely try it if it
> makes any sense.

I have just tried that and they are really both necessary.


-- 
Michal Hocko
L3 team 
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic
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