Public bug reported:
Binary package hint: xbacklight
I can't control the brightness of my x61s after switching from gutsy to
hardy.
I was able to lighten or dim my display in two ways, either with the
function keys through some GNOME applet, or via xbacklight. Both ways
didn't depend on each other, i.e. I could do 100% via the GNOME thing
and 0% via xbacklight and the diplay would be dark.
The GNOME changes were visible through
/sys/class/backlight/acpi_video0/brightness and the xbacklight changes
via "xbacklight -get".
Both way don't work anymore. However, the xbacklight method still works,
after I do a xrandr --output LVDS --set BACKLIGHT_CONTROL native as
mentioned in bug 176888.
The GNOME method doesn't work at all. I can press the function keys and
get this OSD which shows me the changes to brightness, the display
however, doesn't change it's brightness at all. And the files in
/sys/class/backlight/ don't change at all.
That's a pity because the tight integration of gnome-power-manager is
useless, as it's not able to control my displays power consumption.
FWIW: The "Thinkvantage Key" and Power Key don't work any more as well.
They used to make an event, but they don't anymore. Maybe some ACPI code
got buggy.
Please let me know how to debug this issue or what information I can
provide to fix this bug.
** Affects: xbacklight (Ubuntu)
Importance: Undecided
Status: New
--
Can't control backlight on Intels GM965 with neither xbacklight nor
gnome-power-manager
https://bugs.launchpad.net/bugs/207709
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