Ubuntu
linux package

  1. Bug #512567
  2. Comment #4

Comment 4 for bug 512567

Revision history for this message
Isaac Bowen (isaacbowen) wrote : Re: hotkeys adjust brightness non-monotonically on EEEPC 1005PE

Should mention, I'm running Ubuntu 9.10 x86_64. Attaching the output of lspci/dmesg.

Fn-F5 and Fn-F6 do seem to go back and forth along a consistent set of .. brightness settings, but the set is in no way ordered by scale.

cat'ing /proc/acpi/video/VGA/LCDD/brightness gives the following information, which doesn't seem to change at all when the screen brightness is altered by way of the Fn keys:

levels: 0 3 6 9 12 16 19 21 24 27 29 30 32 33 34 36
current: 21

The screen brightness does change (as does the 'current' value) when I write an integer to that file (e.g. echo 3 > /proc/acpi/video/VGA/LCDD/brightness), though interestingly the brightness for 0 isn't nearly as dim as what can be attained using the Fn keys. Likewise, 36 seems to be a touch more dim than the greatest possible brightness from the Fn keys.