I discovered that both scrolling and Youtube-playback (HTML5) works just fine in Chromium, both in Ubuntu 16.10 and Mint 18.1 (which is built on 16.04). So perhaps this is a Firefox bug?
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/1650381 Title: Slow scrolling in Firefox and slow Youtube-playback with Radeon RV730 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1650381/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp