Public bug reported:
Binary package hint: gnome-power-manager
As recommended by Andreas Wenning in Bug #207473, I'm opening a new bug
report. Although there's several similar bugs already reported, I didn't
find one I could really consider a duplicate.
My laptop is Dell Vostro 1400 with a GeForce 8400M GS and I'm using
Hardy. When I press one of the brightness controls keys (Fn + Up or Fn +
Down), four steps of brightness changing happen instead of just one.
There seems to be a consensus in Bug #207473 that the problem lies on
both hal and the desktop manager software responsible for power
management. They both try to adjust the brightness and they both do two
steps instead of one. A fix for kde-guidance, which supposedbly reduces
the number of steps to two (in other words, fixes the problem on kde
side but not on the hal side, which is still being worked on) is already
available in hardy-proposed.
An example of what lshal -m reports when I press Fn + Up only once:
06:53:28.008: computer_logicaldev_input_1 condition ButtonPressed =
brightness-up
06:53:28.010: computer_logicaldev_input condition ButtonPressed = brightness-up
06:53:28.011: platform_i8042_i8042_KBD_port_logicaldev_input condition
ButtonPressed = brightness-up
06:53:28.200: platform_i8042_i8042_KBD_port_logicaldev_input condition
ButtonPressed = brightness-up
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
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Four steps of brightness changing after pressing a brightness key only once
https://bugs.launchpad.net/bugs/239413
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