Hi all,
Sorry to revive an old topic from 3-4 weeks ago, but I just got my X61
this past week and so I missed my chance to chime in. And, as far as
I can tell, Ben ended with "I'm pretty lost by now". Was a decent
solution ever found? If not, where can I code to help? :)
In my tests, the only way I've been able to get reliable backlight
control is to blacklist "video.ko" and use "thinkpad_acpi
brightness_enable=0". Then, the "intel" X driver handles it:
$ xrandr --properties
...
BACKLIGHT_CONTROL: legacy
supported: native legacy combination kernel
BACKLIGHT: 127 (0x0000007f) range: (0,255)
and "xbacklight" gives me excellent control, with at least 100
discernible levels from 0-100%.
Unfortunately, that's independent of the hotkeys and
gnome-power-manager knows nothing about it. I suppose I could fix the
hotkeys with acpid handlers if necessary.
With "video.ko" loaded, the intel driver uses the "kernel" method
instead, which I guess is why xbacklight doesn't work well in that
case. I haven't tried overriding that.
(Kernel 2.6.24, X intel driver 2.2.0)
-jim
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