[ltp] Brightness keys on X61 Tablet

[Jerone Young]

FYI: You maybe intersted in trying Ubuntu Gutsy live CD and seeing
what happens. I have not looked yet, but they are using some patch set
in there kernel with thinkpad-acpi .14 that has everything working
(brightness wise) on my Thinkpad T61.

On 10/15/07, character <char@online.de> wrote:
> Hello,
>
> here's my problem:
> The brightness keys on my X61 Tablet don't work.
>
> I'm running Debian sid, kernel 2.6.23.1 patched with the latest
> thinkpad-acpi release (v0.18-20071013). When I press Fn-End (brightness
> down) acpid catches two events,
> 1) "ibm/hotkey HKEY 00000080 00001011" and
> 2) "video LCD0 00000087 00000000".
>
> The first executes /etc/acpi/thinkpad-brightness-down.sh which doesn't
> do anything because it's a Lenovo laptop. The second event
> executes /etc/acpi/video_brightnessdown.sh which itself executes
> acpi_fakekey 224. I assume now something should happen, but it doesn't.
>
> It doesn't matter if gnome-power-manager is running. If it runs,
> however, a small 'popup' with a brightness-symbol and a bar shows up.
> The bar is empty and won't change.
>
> I can change the brightness level by echoing '5' to /proc/acpi/ibm/cmos.
> However, changing /etc/acpi/thinkpad-brightness-down.sh to do this (echo
> 5 ...) does not help. That is, it doesn't work if the video-ACPI-event
> is triggered and X running. It does work if X is not running, though.
>
>
> Thanks in advance,
>
> char
>
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