[ltp] T61 brightness control - partial solution

[Kai Weber]

Yves-Alexis Perez wrote:
> On Wed, Mar 26, 2008 at 08:47:03PM +0000, Jimmy Wu wrote:
>> I have a T61 running Debian Sid. The Fn+Home and Fn+End work in that
>> they change the screen brightness, though nothing pops up to indicate
>> the current level. I counted 16 levels of brightness on the way down
>> [...]
 >
> You mean that brightness works out of the box on an fresh sid install using
> pure Xfce4? What is your graphic card (intel or nvidia)?

This would be very strange and be the opposite to my experience. 
Backlight does not work here. Debian/sid, 2.6.24 and thinkpad_acpi:

thinkpad_acpi: ThinkPad ACPI Extras v0.19-20080213
thinkpad_acpi: http://ibm-acpi.sf.net/
thinkpad_acpi: ThinkPad BIOS 7LETB0WW (2.10 ), EC 7KHT24WW-1.08
thinkpad_acpi: Lenovo ThinkPad T61
thinkpad_acpi: radio switch found; radios are enabled
thinkpad_acpi: Lenovo BIOS switched to ACPI backlight control mode
thinkpad_acpi: standard ACPI backlight interface available, not loading 
native one...

Kai