Hi Christopher,
thanks for your continued help.
The command
"echo 8 > /sys/class/backlight/intel_backlight/brightness"
does set the brightness to a very low value (basically completely black). This
was done with the "acpi_backlight=vendor" kernel parameter in use.
Rebooting "with just kernel parameter
video.use_bios_initial_backlight=0" does not change anything (indicator
bubble pops up, backlight level doesn't actually change).
Rebooting "with just kernel parameter video.use_native_backlight=1"
does not change anything (indicator bubble pops up, backlight level
doesn't actually change).
This did work: "Creating a new file in
/usr/share/X11/xorg.conf.d/80-backlight.conf and pasting into it the following
code:
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "sna"
Option "Backlight" "intel_backlight" # use your backlight that
works here
BusID "PCI:0:2:0"
EndSection
"
The backlight control now works properly (indicator bubble and proper backlight
change). Furthermore, it is now possible to turn off the touchpad by using the
function key (the indicator bubble does show up).
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https://bugs.launchpad.net/bugs/1392016
Title:
[Asus UL30VT] Backlight control does not work
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