Alf, the backlight CAN be adjusted with the dialog box, but not using the keys (which call lxqt-config-brightness). I can verify this by adjusting it then catting /sys/class/backlight/amdgpu_bl0/brightness :
Max cat /sys/class/backlight/amdgpu_bl0/brightness 255 Min cat /sys/class/backlight/amdgpu_bl0/brightness 13 Note: this works even if the brightness file is read only to my user: echo 123 > /sys/class/backlight/amdgpu_bl0/brightness bash: /sys/class/backlight/amdgpu_bl0/brightness: Permission denied After that test, I did chmod a+w on /sys/class/backlight/amdgpu_bl0/brightness to make absolutely sure it is accessible in case that is the issue with the keys, but it made no difference. lxqt-config-brightness -d and lxqt-config-brightness -i still adjust the brightness/gamma rather than the backlight. Walter, I tried lxqt-backlight_backend --inc as in your link, but it does not work (as above, even after having changed the permissions on the /sys/class/backlight/amdgpu_bl0/brightness file: retro@howard:~$ cat /sys/class/backlight/amdgpu_bl0/brightness 13 retro@howard:~$ lxqt-backlight_backend --inc retro@howard:~$ lxqt-backlight_backend --inc retro@howard:~$ lxqt-backlight_backend --inc retro@howard:~$ lxqt-backlight_backend --inc retro@howard:~$ lxqt-backlight_backend --inc retro@howard:~$ lxqt-backlight_backend --inc retro@howard:~$ lxqt-backlight_backend --inc retro@howard:~$ lxqt-backlight_backend --inc retro@howard:~$ cat /sys/class/backlight/amdgpu_bl0/brightness 13 Also as per comment #2, lxqt-config-brightness -r still returns "Debug: No outputs have backlight property" when the file is accessible. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1829641 Title: brightness keys on laptop don't dim the backlight To manage notifications about this bug go to: https://bugs.launchpad.net/lxqt/+bug/1829641/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
