Re: Thinkpad brightness keys kill X on 2.6.26.5

[Jeremy Fitzhardinge]

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.

   J
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