Ubuntu

  1. Bug #1895782
  2. Comment #2

Comment 2 for bug 1895782

Revision history for this message
Patrick Elsen (xfbs+) wrote :

I have this issue as well on elementaryOS based on Ubuntu 18.04:

Linux Celer 5.4.0-52-generic #57~18.04.1-Ubuntu SMP Thu Oct 15 14:04:49 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Tried booting with

thinkpad-acpi.brightness_enable=1 acpi_backlight=vendor

But no luck either. There is something in `/sys/class/backlight` but writing to `brightness` has no effect.