On 10/27/15 16:10, Alex Deucher wrote: > > It would appear that your system does not use the gpu backlight > controller. Either it's lying or messing with the GPU backlight > controller causes some bad interaction with whatever does control it. > Does the attached radeon patch help? I'm also attaching an amdgpu > patch for reference in case the same problem appears on amdgpu. > no, still no backlight when applied against current current mainline 858e904bd71dd0057a548d6785d94ce5ec4aeabd (Merge tag 'iommu-fixes-v4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu) _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel