[ltp] brightness keys not working correctly on T61

[Henrique de Moraes Holschuh]

On Sun, 28 Oct 2007, Yves-Alexis Perez wrote:
> I have a new T61 8897CTO (4/3 SXGA+ with intel grapics). I'm running a
> vanilla 2.6.24-rc1 kernel, and the brightness keys don't work.

1. Update to the latest BIOS, and send me privately the dmidecode output
(remove serial numbers and UUIDs) and also the output of acpidump, please.

2. Check if volume and brightness keys work in console mode, and if they
cause any key events to be reported to the console (Lenovo has been changing
the BIOS of the T61/R61 in this area).

3. Make sure you are using the latest thinkpad-acpi from ibm-acpi.sf.net.

4. Make sure the acpi video driver is loaded.  It is this driver which
should take care of brightness change notices in the T61.  How buggy this
driver is, I don't know.  It did get a lot of changes recently, and I didn't
have the time to look at backporting it yet.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh