On 20 April 2018 at 17:50, Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> wrote: > On Fri, 20 Apr 2018, Ian W MORRISON <ianwmorrison@xxxxxxxxx> wrote: >> I've performed backport testing and some additional analysis as follows: > > What testing did you do beyond booting? Did you run igt? > > BR, > Jani. I did some basic testing including running a 4K video on Chrome whilst running intel_gpu_top. The intel_gpu_top program doesn't display anything on 4.12 either with or without the patch as neither I nor Canonical enabled CONFIG_DRM_I915_ALPHA_SUPPORT. Do you think that the stable tag should exclude 4.12 because of the 'alpha quality support' and if so do you want a V2 of the patch? Best regards, Ian