well, 2.6 _is_ 7.5.0... so you just proved that it's not the -ati driver causing it. The diff to 2.5 was:
c74de9fec13fac2 PRIME: Don't advertise offload capabilities when acceleration is disabled 636a6382f80412a Remove duplicate OPTION_PAGE_FLIP entry c854b4479ec5122 radeon: bump version post release none of which have anything to do with your usecase, so if you saw a difference in behaviour then that's funny, but not caused by the driver. That leaves the kernel and mesa to bisect then, and at this point I'll give up. -- 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/1610591 Title: Video acceleration regression for Radeon Xpress 200M (r300) in xorg- lts-xenial & xorg-lts-wily To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-driver-ati/+bug/1610591/+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