In my case (Dell Inspiron 9400) I get 4 events with every key press, and 4 brightness level change by gnome-power-manager respectively. This is with 1 brightness down key press:
snifer@snifer-laptop:~$ lshal -m
Start monitoring devicelist: ------------------------------------------------- 19:25:50.117: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-down 19:25:50.124: computer_logicaldev_input_1 condition ButtonPressed = brightness-down 19:25:50.124: computer_logicaldev_input condition ButtonPressed = brightness-down 19:25:50.328: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-down
In my case (Dell Inspiron 9400) I get 4 events with every key press, and 4 brightness level change by gnome-power-manager respectively.
This is with 1 brightness down key press:
snifer@ snifer- laptop: ~$ lshal -m
Start monitoring devicelist: ------- ------- ------- ------- ------- ------- i8042_i8042_ KBD_port_ logicaldev_ input condition ButtonPressed = brightness-down logicaldev_ input_1 condition ButtonPressed = brightness-down logicaldev_ input condition ButtonPressed = brightness-down i8042_i8042_ KBD_port_ logicaldev_ input condition ButtonPressed = brightness-down
-------
19:25:50.117: platform_
19:25:50.124: computer_
19:25:50.124: computer_
19:25:50.328: platform_