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[vellamike <vellamike@xxxxxxxxx>]

I have exactly the same problem with Ubuntu 13.10 on a Dell latitude
e7240 with Cinnamon and 3.11.0-15-generic.

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https://bugs.launchpad.net/bugs/1102318

Title:
  Slow system after resume from suspend

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  Hello,

  For quite some time I've been experiencing problems with Ubuntu after
  resume from suspend. I have an Asus M70SR notebook with ATI Radeon
  Mobility HD3470 and using the open-source driver for it (from Quantal
  official repository). Currently I have Ubuntu 12.10 installed, but the
  same was happening before with 12.04. It doesn't matter if I use
  Unity, Gnome-Shell or Gnome Classic - the slow down is always there.
  My /etc/X11/xorg-conf looks like this:

  Section "Device"
  	Identifier	"ATI Radeon 3470HD"
  	Driver		"ati"
  	Option "AccelMethod" "EXA"
  	Option "AccelDFS" "true"
  	Option "EnablePageFlip" "true"
  	Option "SwapbuffersWait" "off"
  	Option "ColorTiling" "on"
  	Option "ColorTiling2D" "on"
  EndSection 

  To give you some picture about it:

  Glxgears BEFORE suspend:
  ATTENTION: default value of option vblank_mode overridden by environment.
  ATTENTION: default value of option vblank_mode overridden by environment.
  ATTENTION: option value of option vblank_mode ignored.
  4007 frames in 5.0 seconds = 801.315 FPS
  3867 frames in 5.0 seconds = 773.359 FPS
  3918 frames in 5.0 seconds = 782.475 FPS
  3879 frames in 5.0 seconds = 774.902 FPS
  3859 frames in 5.0 seconds = 771.025 FPS

  
  Glxgears AFTER resume from suspend:
  ATTENTION: default value of option vblank_mode overridden by environment.
  ATTENTION: default value of option vblank_mode overridden by environment.
  ATTENTION: option value of option vblank_mode ignored.
  519 frames in 5.0 seconds = 103.466 FPS
  455 frames in 5.0 seconds = 90.993 FPS
  449 frames in 5.0 seconds = 89.738 FPS
  553 frames in 5.0 seconds = 110.366 FPS
  530 frames in 5.0 seconds = 105.835 FPS

  As you can see the performance after resume from suspend is about
  1/8th of the normal. The workaround is to kill the X server (Ctrl-Alt-
  Backspace) and login again, the problem is gone then. However, it's
  quite annoying to have to close all open apps and then reopen them
  again.

  As you can see, I use vblank_mode=0 option and in Compiz the Vsync is
  turned off. The measuring was done from Gnome Classic session, but I
  can experience the same slowdown in Unity and in Gnome Shell as well.

  Best regards,
  Roman Dinga
  --- 
  ApportVersion: 2.6.1-0ubuntu10
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  diniadeedee   5475 F.... pulseaudio
   /dev/snd/controlC0:  diniadeedee   5475 F.... pulseaudio
   /dev/snd/pcmC0D0p:   diniadeedee   5475 F...m pulseaudio
  DistroRelease: Ubuntu 12.10
  HibernationDevice: RESUME=UUID=/etc/initramfs-tools/conf.d/resume
  InstallationDate: Installed on 2012-04-29 (268 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MachineType: ASUSTeK Computer Inc. M70SR
  MarkForUpload: True
  Package: linux (not installed)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.7.0-7-generic root=UUID=f66e8c9c-0fd3-46e3-8484-5306b2f24bcb ro quiet splash radeon.pcie_gen2=1 vt.handoff=7
  ProcVersionSignature: Ubuntu 3.7.0-7.15-generic 3.7.0
  RelatedPackageVersions:
   linux-restricted-modules-3.7.0-7-generic N/A
   linux-backports-modules-3.7.0-7-generic  N/A
   linux-firmware                           1.98
  Tags:  quantal
  Uname: Linux 3.7.0-7-generic i686
  UnreportableReason: This is not an official Ubuntu package. Please remove any third party package and try again.
  UpgradeStatus: Upgraded to quantal on 2012-11-05 (78 days ago)
  UserGroups: adm audio bluetooth cdrom dip kvm libvirtd lpadmin netdev plugdev sambashare sudo vboxusers video
  dmi.bios.date: 03/21/2008
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 204
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: M70SR
  dmi.board.vendor: ASUSTeK Computer Inc.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK Computer Inc.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr204:bd03/21/2008:svnASUSTeKComputerInc.:pnM70SR:pvr1.0:rvnASUSTeKComputerInc.:rnM70SR:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
  dmi.product.name: M70SR
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK Computer Inc.

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