This patch resolves the issue, but to be precise we should also set
/org/freedesktop/Hal/devices/dell_lcd_panel:
laptop_panel.brightness_in_hardware = true
in hal-info(?). To do it manually:
sudo hal-set-property --udi '/org/freedesktop/Hal/devices/dell_lcd_panel'
--key laptop_panel.brightness_in_hardware --bool true
However SetBrightness does not seem to work on this model anyway, so it
does nothing. This means dim on idle/dim on battery does not work.
GetBrightness does work.
Can one of the hal maintainers have a look at this patch?
** Changed in: hal (Ubuntu)
Assignee: harrydb (harrydeboer) => (unassigned)
Status: In Progress => Fix Committed
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[Hardy]Status of display brightness freezes g-p-m (or even X) for a while
https://bugs.launchpad.net/bugs/176687
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