I installed linux-firmware-nonfree, xserver-xorg-video-intel and some other related packages and even a skylake driver directly downloaded from intel ... but nothing. Still can't change the brightness and the '/sys/class/backlight' directory is empty. It seems that the OS doesn't recognize the graphics chipsets. My laptop has also an NVIDIA graphics card as well, but installing nvidia driver disabled the Xserver to start so I removed xorg.conf to be able to login to the system again.
This is the output of some commands to get more information about the hardware:
Code: Select all
lspci -nnk | grep -i vga -A 2
00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:1916] (rev 07)
Subsystem: ASUSTeK Computer Inc. Device [1043:1280]
00:04.0 Signal processing controller [1180]: Intel Corporation Device [8086:1903] (rev 08)
lshw -c video
*-display UNCLAIMED
description: VGA compatible controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 07
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list
configuration: latency=0
resources: memory:dd000000-ddffffff memory:b0000000-bfffffff ioport:f000(size=64)
*-display
description: 3D controller
product: NVIDIA Corporation
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a2
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: irq:16 memory:de000000-deffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:e000(size=128) memory:df000000-df07ffff
xbacklight
No outputs have backlight property