Public bug reported:
Binary package hint: gnome-power-manager
Pressing either the fn f9 (brightness down) or fn f10 (brightness up)
results in the brightness control appearing on screen, however the
brightness level is not adjusted, and the on-screen brightness slider
does not change the position.
Description: Ubuntu 10.10
Release: 10.10
gnome-power-manager 2.32.0-0ubuntu1
policykit-1 0.96-2ubuntu1
Running gnome-power-manager -v reveals this error when attempting to
adjust the brightness level
pkexec /usr/sbin/gnome-power-backlight-helper --set-brightness 23
**
ERROR:pkexec.c:124:pam_conversation_function: code should not be reached
Aborted
Running the command manually also results in the same error.
Manually adjusting the brightness via the command line works, for example
sudo echo 50 >/proc/acpi/video/DGFX/LCD/brightness
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/704544
Title:
brightness keys don't work on HP Elitebook 8540p
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