forwarded 451847 https://bugs.freedesktop.org/show_bug.cgi?id=13375 thank you
Joey Hess wrote: > Package: xserver-xorg-video-intel > Version: 2:2.2.0-1 > Severity: normal > > LVDS Laptop panel. Properties: > BACKLIGHT - set backlight level > BACKLIGHT_CONTROL - set backlight level control method (i.e. > use kernel interfaces, native LVDS power register, legacy reg‐ > ister, or combination) > > It's hard to figure out from this documentation what value should be passed > to xrandr to enable the different backlight control methods. It turns out > to be the first word of each phrase ("kernel", "native", "legacy", or > "combination"). > Forwarded upstream at the URL above. Brice