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[Bug 1364629] Re: Desktop environment particularly slow while using radeon driver


Fran Diéguez, the next step is to fully commit bisect the kernel, in
order to identify the offending commit. Could you please do this
following https://wiki.ubuntu.com/Kernel/KernelBisection ?

** Tags removed: kernel-bug-exists-upstream-3.17
** Tags added: kernel-bug-exists-upstream-3.17-rc3

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  Desktop environment particularly slow while using radeon driver

Status in “linux” package in Ubuntu:

Bug description:
  GNOME Shell and sublime-text, particularly when doing scrolls are really slow.
  While using 3.13 version this slowness is not reproducible.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-12-generic 3.16.0-12.18
  ProcVersionSignature: Ubuntu 3.16.0-12.18-generic 3.16.1
  Uname: Linux 3.16.0-12-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.7-0ubuntu1
  Architecture: amd64
   /dev/snd/controlC0:  fran       2728 F.... pulseaudio
   /dev/snd/controlC1:  fran       2728 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Tue Sep  2 23:08:46 2014
  InstallationDate: Installed on 2013-10-31 (306 days ago)
  InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release amd64 (20131017)
  MachineType: Apple Inc. MacBookPro8,2
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-12-generic root=UUID=dc72a6ab-bd38-4a3e-ad02-39353a4c68b3 ro quiet splash vt.handoff=7
   linux-restricted-modules-3.16.0-12-generic N/A
   linux-backports-modules-3.16.0-12-generic  N/A
   linux-firmware                             1.133
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-08-20 (12 days ago)
  dmi.bios.date: 01/24/12
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP81.88Z.0047.B27.1201241646
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-94245A3940C91C80
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro8,2
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-94245A3940C91C80
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP81.88Z.0047.B27.1201241646:bd01/24/12:svnAppleInc.:pnMacBookPro8,2:pvr1.0:rvnAppleInc.:rnMac-94245A3940C91C80:rvrMacBookPro8,2:cvnAppleInc.:ct10:cvrMac-94245A3940C91C80:
  dmi.product.name: MacBookPro8,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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