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 Desktop Packages, 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 Status in xserver-xorg-driver-ati: Unknown Status in xserver-xorg-video-ati package in Ubuntu: Incomplete Bug description: After updating the Ubuntu HWE stack in 14.04 to Xenial (kernel 4.4 and xserver-xorg-video-radeon-lts-xenial), system boots up fine and responsively, but screen is laggy; there is a tremendous performance regression in comparison to xorg-lts-vivid. Lots of video tearing that did not occur when using xserver-xorg-video-radeon-lts-vivid. System is an older Pentium laptop (Packard Bell EasyNote) with a Radeon Xpress 200M chip (r300 driver). Video acceleration was working with DRI2 under the Vivid stack (kernel 3.19-64-lowlatency + xserver-xorg-video-radeon-lts-vivid). I also tried upgrading to the Wily kernel (4.2.0-lowlatency), and video acceleration works fine with the Vivid xorg. I reported this in launchpad previously, and it was dismissed as "invalid" since Wily is EOL. The problem, however, persists in the Xenial stack, so I'm reporting it here. Attached are the respective Xorg.0 logs. To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-driver-ati/+bug/1610591/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
