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
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https://bugs.launchpad.net/bugs/1504982
Title:
Video performance noticeably slow on AMD A10-7800 system
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