Re: Thinkpad brightness keys kill X on 2.6.26.5

Pavel Machek
2008-10-01T09:39:17Z

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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