linux-kernel - Re: enabling kms for i915 disables brightness control and xrandr

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Date:	Sun, 29 Mar 2009 14:07:02 +0100
From:	Sitsofe Wheeler <sitsofe@...oo.com>
To:	Soeren Sonnenburg <sonne@...ian.org>
Cc:	linux-kernel@...r.kernel.org, Eric Anholt <eric@...olt.net>,
	dri-devel@...ts.sourceforge.net,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: Re: enabling kms for i915 disables brightness control and xrandr

(CC'ing dri-devel, Eric Anholt and Jesse Barnes)

On Sun, Mar 29, 2009 at 12:34:01PM +0200, Soeren Sonnenburg wrote:
> Dear all,
> 
> I am not sure if this is just a user error/ too old userspace problem,

[User stated that 2.6.3 intel driver is being used in another email]

> but I recognized that when I enable kernel based modesetting on a intel
> 945 based samsung nc 10 netbook, I loose brightness control from within
> X and X resolutions are wrong (instead of 1024x600 it is 1024x1024) and
> xrandr does no longer have the all the modelines ranging from 1024x600
> to 640x350... Trying to change resolutions / setting the brightness via
> xrandr results in error messages being printed. 
> 
> Furthermore, this same flag disables Xv support..
> 
> However, screen switches between terminal and X are quite fast now
> (without any flicker) and suspend and everything works stably.
> 
> I recognized that I can set the brightness via
> 
> setpci -s 00:02.1 F4.B=XX
> 
> (XX ranging from 00 to FF) just fine...
> 
> I am attaching the .config .
> 
> Any ideas?
> Soeren

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