Thinkpad X21 & Debian - how to turn off LCD backlight
I'm using an old IBM Thinkpad X21 laptop with Debian Squeeze as a server (irc bouncer etc.). I'd like to turn the display backlight off to save power and the backlight CCFLs itself but I haven't found a way to do so.
The screen goes blank automatically after some time but the backlight still stays on.
DPMS via xset does not work because X is not installed.
Fn+F3 should turn the LCD off but it doesn't work either. I think I saw some bug reports for thinkpad-acpi about this problem.
Is there a way to do it at all? Or do I just have to keep it on, brightness at minimum?
Last edited by Ormu; 09-06-2012 at 01:32 PM.