https://bugs.freedesktop.org/show_bug.cgi?id=110973
Bug ID: 110973
Summary: GeForce GT 750M Mac Edition backlight
Product: Mesa
Version: unspecified
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/nouveau
Assignee: nouveau@lists.freedesktop.org
Reporter: a...@axet.ru
QA Contact: nouveau@lists.freedesktop.org
Created attachment 144616
--> https://bugs.freedesktop.org/attachment.cgi?id=144616&action=edit
sudo acpidump -o acpidump.txt
Hello!
I notice when laptop display went off, it keep backlight on.
Technically speaking this:
# xset dpms force off
only set screen to black, without turning off LCD backlight.
My kernel has "acpi_backlight=vendor" which enables backlight control from
function keys and gnome recognize those actions by displaying popup with
current brightness level.
Everything seems works fine, I've been able to turn display off using:
# echo 0 > /sys/devices/pnp0/00:03/backlight/gmux_backlight/brightness
But still no luck with 'xset'.
axet@axet-laptop:~$ ls -al /sys/class/backlight/
total 0
drwxr-xr-x 2 root root 0 июн 23 23:13 .
drwxr-xr-x 67 root root 0 июн 23 23:13 ..
lrwxrwxrwx 1 root root 0 июн 23 23:13 gmux_backlight ->
../../devices/pnp0/00:03/backlight/gmux_backlight
axet@axet-laptop:~$
Maybe related: https://bugs.freedesktop.org/show_bug.cgi?id=106869
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