Public bug reported: I changed the CPU on my system, from an AMD A10-6800K to an AMD A10-7800, and the video performance got noticeably slower.
When I use the Sublime text editor, now there are frequent and significant slowdowns in the scrolling of open files. If I change from the open source driver to the closed source one (fglrx), the slowdowns disappear, and the performance is the same as before I changed the CPU. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xserver-xorg-video-radeon-lts-vivid 1:7.5.0-1ubuntu2~trusty1 ProcVersionSignature: Ubuntu 3.19.0-30.34~14.04.1-generic 3.19.8-ckt6 Uname: Linux 3.19.0-30-generic x86_64 NonfreeKernelModules: fglrx zfs zunicode zcommon znvpair zavl ApportVersion: 2.14.1-0ubuntu3.15 Architecture: amd64 Date: Sun Oct 11 19:20:48 2015 InstallationDate: Installed on 2015-10-11 (0 days ago) InstallationMedia: Xubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) SourcePackage: xserver-xorg-video-ati-lts-vivid UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: xserver-xorg-video-ati-lts-vivid (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug third-party-packages trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1504982 Title: Video performance noticeably slow on AMD A10-7800 system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati-lts-vivid/+bug/1504982/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs