/var/log/messages gets filled with Sep 30 11:28:02 8540w pkexec: pam_unix(polkit-1:session): session opened for user root by (uid=1001) Sep 30 11:28:02 8540w pkexec[19411]: poncho: Executing command [USER=root] [TTY=unknown] [CWD=/home/poncho] [COMMAND=/usr/libexec/gsd-backlight-helper --set-brightness 100] Sep 30 11:28:27 8540w pkexec: pam_unix(polkit-1:session): session opened for user root by (uid=1001) Sep 30 11:28:27 8540w pkexec[19761]: poncho: Executing command [USER=root] [TTY=unknown] [CWD=/home/poncho] [COMMAND=/usr/libexec/gsd-backlight-helper --set-brightness 100] xsession-errors gets filled with Could not set the value of the backlight: writing '100' to /sys/class/backlight/acpi_video0/brightness failed Could not set the value of the backlight: writing '100' to /sys/class/backlight/acpi_video0/brightness failed % cat /sys/class/backlight/acpi_video0/max_brightness 24 % cat /sys/class/backlight/acpi_video0/brightness 24 % cat /sys/class/backlight/acpi_video0/actual_brightness 24 setting a value between 1 and 24 works fine % echo 20 > /sys/class/backlight/acpi_video0/brightness it seems that gnome-settings-daemon doesn't honor the max_brightness value... Reproducible: Always ================================================================= Package Settings ================================================================= gnome-base/gnome-settings-daemon-3.2.0 was built with the following: USE="cups (multilib) policykit udev -debug -packagekit -short-touchpad-timeout -smartcard -test"
Created attachment 288337 [details] emerge --info
Do you have x11-apps/xbacklight installed? Does "xbacklight -set 100" produce any errors in logs? What is the output of "/usr/libexec/gsd-backlight-helper --get-max-brightness" ?
This is probably fixed in gnome-settings-daemon-3.2.0-r1, please check. (Note: you will need to log out and log back in after updating gnome-settings-daemon)
(In reply to comment #3) > This is probably fixed in gnome-settings-daemon-3.2.0-r1, please check. > > (Note: you will need to log out and log back in after updating > gnome-settings-daemon) I don't have x11-apps/xbacklight installed. It doesn't work with nvidia's blob. This issue is indeed fixed with gnome-settings-daemon-3.2.0-r1. Thanks for fixing...
