Public bug reported:
Binary package hint: gnome-power-manager
Hi,
on my Sony Vaio SZ3/XWP and Dell Latitude D820 (both with nvidia
chipset) the gnome display brightness control does not work.
On the Vaio the problem represents as follow:
Gnome brightness control sets a value between 0 and 7 to
/sys/class/backlight/sony/brightness. This works for the intel chipset,
but not for the nvidia one. On the nvidia chipset, you have to call
/usr/bin/smartdimmer, which sets a value between 0 and 21 to adjust
brightness. This works, and Fn-F5/Fn-F6 does this correct.
Possibile solutions:
(1)
- check if nvidia chipset is present and used
- call /usr/bin/smartdimmer -s <value> instead of writing to
/sys/class/backlight/sony/brightness
(2)
- use the acpi-script /etc/acpi/sonybright.sh, which has a hack to
smartdimmer and is already used by the Fn-keys
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
--
[7.10] Doesn't dim screen on nvidia chipsets
https://bugs.launchpad.net/bugs/173622
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