I’ve bought a new laptop with GTX 1080. Unfortunately I’am unable to get backlight control working. In default state, brightness keys seems to work (I can see ACPI events, brightness bar on screen changes), but it has no real effect on display backlight. Xbacklight does not work as well (I’ve found some threads about backlight here, but xbacklight is working there. This is not my case).
I have tried various acpi kernel parameters, the only result was that even brightness controlling keys stopped working.
I have tried to install nvidiabl module from here: https://github.com/madsherlock/nvidiabl but it has no support for Pascal cards and I don’t know how to add it properly.
I’am using Nvidia 387.34 driver with Ubuntu 17.10, but it was the same with Ubuntu default driver.
nvidia-bug-report.log.gz (140 KB)