I've finally succeeded with adjusting the screen brightness. Firstly, I've added acpi_fake_ecdt=1 option to boot parameters. Then switched to the console and was able to adjust the brightness by
cat $VALUE > /proc/acpi/video/NVID/LCD/brightness. However, this still doesn't work for adjusting the brightness from within X. The video module still would crash, too. -- Samsung Q70 - error while modprobing video, also can't adjust backlight https://bugs.launchpad.net/bugs/216221 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs