https://bugzilla.kernel.org/show_bug.cgi?id=198511 --- Comment #25 from Barto (mister.freeman@xxxxxxxxxxx) --- Someone has made a suggestion to me : go to "about:support" in firefox for ckecking some options, I can read this : HW_COMPOSITING blocked by default: Acceleration blocked by platform OPENGL_COMPOSITING unavailable by default: Hardware compositing is disabled WEBRENDER opt-in by default: WebRender is an opt-in feature unavailable by runtime: Build doesn't include WebRender and this guy told me to check if the property "layers.acceleration.force-enabled" is set to true in firefox ( in "about:config" section ), I checked and it was set to false by default, so I set it to true and I restarted firefox, and now there is no lag in firefox for youtube video 1080p@60 fps with kernel 4.15rc8 but this advice seems to be a "cheat mode/workaround", it doesn't explain why your commit triggers this problem with firefox 57 when "layers.acceleration.force-enabled" option is disabled in firefox ( which is the default value ), with kernel 4.14.14 ( and when I revert your commit ) youtube video plays without lags, even if "layers.acceleration.force-enabled" is disabled -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
