GeForce GT 750M Mac Edition backlight
Submitted by Alexey Kuznetsov
Assigned to Nouveau Project
Created attachment 144616 sudo acpidump -o acpidump.txt
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
Attachment 144616, "sudo acpidump -o acpidump.txt":