linux-kernel - Re: Thinkpad brightness keys kill X on 2.6.26.5

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Message-ID: <20081001094041.GB897@elf.ucw.cz>
Date:	Wed, 1 Oct 2008 11:40:41 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	carbonated beverage <ramune@...-ronin.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Thinkpad brightness keys kill X on 2.6.26.5

On Tue 2008-09-30 17:59:06, Jeremy Fitzhardinge wrote:
> Pavel Machek wrote:
>> Hi!
>>
>>   
>>> I just upgraded from 2.6.25.17 to 2.6.26.5 on my Thinkpad Z61t, and found
>>> the brightness keys will cause the X server to die.  When using the
>>> brightness up/down keys, the screen will go blank -- Control+Alt+F# will
>>> still switch to a different virtual console, but switching back will not
>>> restore the video state.
>>>
>>> After killing the window manager, I was able to bring up X again without
>>> a problem -- but using the brightness keys still causes it to go blank
>>> again within X, while the brightness does get changed correctly on the
>>> console.
>>>
>>> There were no kernel messages, but this appeared in the Xorg log:
>>>     
>>
>> Yes, I had similar problems... for me it blanked screen on closing
>> lid. Problem disappeared after upgrading X...
>>
>>   
>>> .config attached -- is this a known issue?  In the meantime, I'm starting
>>> a bisection to figure out where the problem crops up.
>>>     
>>
>> For me CONFIG_ACPI_VIDEO never really worked...
>>   
>
> On my shiny new X200 running Fedora Rawhide, I'm finding that the 
> brightness control keys work OK, but the backlight remains stuck off after 
> a resume.  The machine is working fine but the backlight is just off; I can 
> see the display under a bright light.  Switching consoles and poking about 
> in /sys/class/backlight/acpi_video?/ didn't help.

What are you using for s2ram? s2ram -f -a 3 normally works on thinkpads...
									Pavel

-- 
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