On 05/21/2014 09:02 PM, Lewis Toohey wrote: > Hi Aaron > > I followed your instructions and can report some limited success. I > have two interfaces listed in /sys/class/backlight namely: > acpi_video0 radeon_bl0 > > max_brightness for acpi_video0 is 11. Echo-ing new values to > brightness appears to have no effect. > > max_brightness for radeon_bl0 is 255. Echo-ing new values to > brightness does adjust the screen brightness as you would expect. > > Results are the same on both battery and powered. > > I hope that is useful. I think Hans' patchset should solve your problem, can you please give it a try? You will need to pass the video.use_native_backlight=1 to kernel cmdline when testing, thanks. [PATCH resend 0/4] Make video.use_native_backlight=1 work properly with nouveau http://www.spinics.net/lists/dri-devel/msg59941.html -Aaron -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
