https://bugzilla.kernel.org/show_bug.cgi?id=105051 --- Comment #4 from Tim Sammut <tim.sammut@xxxxxxxxx> --- (In reply to Alex Deucher from comment #1) > Radeon hardware supports 256 levels of brightness (0-255). The backlight > integer property max_brightness is thus set to RADEON_MAX_BL_LEVEL (0xff). > It sounds like GNOME is misinterpreting the value. Hi Alex, thanks. I don't think is a GNOME issue. This is via /sys and you can see the max_brightness = -1 here: $ for F in /sys/class/backlight/*/{type,max_brightness}; do echo $F: $(cat $F); done | sort /sys/class/backlight/gmux_backlight/max_brightness: -1 /sys/class/backlight/gmux_backlight/type: platform /sys/class/backlight/radeon_bl0/max_brightness: 255 /sys/class/backlight/radeon_bl0/type: raw Manually adjusting the brightness via `echo $level > /sys/class/backlight/gmux_backlight/brightness` works, but GNOME control of brightness and the on-screen display do not. > The radeon backlight code hasn't really changed since it was added so > presumably something else did. Can you bisect? Since this is a mac, > it's possible the GPU driver does not actually control the backlight. > Everything is a one off on macs. Yeah, but probably not for 3+ weeks... sorry. -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
