Right, that shows it: It first tries the XBACKLIGHT extension:
TI:17:40:53 TH:0x840f168 FI:gpm-brightness-xrandr.c
FN:gpm_brightness_xrandr_setup_display,170
- No outputs have backlight property
TI:17:40:53 TH:0x840f168 FI:gpm-brightness-xrandr.c
FN:gpm_brightness_xrandr_init,718
- no XRANDR extension, so aborting init
but apparently your video driver doesn't support that. What video card
do you have?
g-p-m falls back to hal when xrandr doesn't work, but hal does not see
any panel either:
TI:17:40:53 TH:0x840f168 FI:gpm-brightness-hal.c
FN:gpm_brightness_hal_init,462
- No devices of capability laptop_panel
So apparently your brightness keys are hardwired, so that they work
without the operating system's support. But without detecting the
backlight device, g-p-m is unable to determine the current brightness
level and give a notification for it.
** Package changed: gnome-power-manager (Ubuntu) => xorg (Ubuntu)
** Changed in: xorg (Ubuntu)
Importance: Medium => Low
** Changed in: xorg (Ubuntu)
Status: Incomplete => Confirmed
** Changed in: xorg (Ubuntu)
Assignee: Martin Pitt (pitti) => (unassigned)
** Summary changed:
- Acer Aspire One: OSD for brightness keys not working properly
+ Acer Aspire One: no xrandr backlight device
--
Acer Aspire One: no xrandr backlight device
https://bugs.launchpad.net/bugs/441825
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