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[Guram Savinov <guram.savinov@xxxxxxxxx>]

Please reopen the issue. because I have this problem on my laptop.
I can provide you with information needed to try to resolve this problem in AMD drivers.

AMD radeon HD3650 mobile graphics
Ubuntu 12.04.5
linux-generic-lts-trusty 3.13.0.48.42
libegl1-mesa-lts-trusty 10.1.3-0ubuntu0.2~precise2
linux-firmware 1.79.18
xserver-xorg-video-ati-lts-trusty 1:7.3.0-1ubuntu3.1~precise1

dmesg.log file has been attached, it contain error messages about this
bug.

** Attachment added: "error messages from dmesg"
   https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1367870/+attachment/4359900/+files/dmesg.log

** Changed in: xorg (Ubuntu)
       Status: Invalid => New

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https://bugs.launchpad.net/bugs/1367870

Title:
  Ubuntu 14.04 system with Radeon HD 6330M hangs regularly, especially
  when using Google Chrome

Status in xorg package in Ubuntu:
  New

Bug description:
  I'm reporting this bug at the request of kbr@xxxxxxxxxxxx at
  https://code.google.com/p/chromium/issues/detail?id=404357#c34 .
  Please see https://code.google.com/p/chromium/issues/detail?id=404357
  for details.  The appropriate package for this bug might be xserver-
  xorg-video-ati but that's a guess.

  Summary:
  Using Google Chrome 36+ on an ubuntu 14.04 system with  an AMD Radeon HD 6330M graphics card has been regularly causing system hangs.  These appear to be particularly likely when playing Flash-based games such as those on Facebook.  Scroll up and down using the vertical scrollbar or the mousewheel and chrome will segfault.

  WORKAROUND: Use fglrx.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
  Uname: Linux 3.13.0-35-generic i686
  .tmp.unity.support.test.0:

  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: i386
  CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Wed Sep 10 19:29:10 2014
  DistUpgraded: 2014-07-06 18:19:11,036 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Robson LE [Radeon HD 6330M] [1002:68e5] (prog-if 00 [VGA controller])
     Subsystem: Tul Corporation / PowerColor Cedar [Radeon HD 5450] [148c:5450]
  InstallationDate: Installed on 2013-10-19 (326 days ago)
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
  MachineType: MEDIONPC MS-7366
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=57c8f83f-22f9-4998-9943-259a1df235a0 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: Upgraded to trusty on 2014-07-06 (66 days ago)
  XorgConf:
   Section "Module"
    Load	"glx"
   EndSection
  dmi.bios.date: 01/08/2008
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: A7366NM7.20E
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: MS-7366
  dmi.board.vendor: MEDIONPC
  dmi.board.version: 2.2
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrA7366NM7.20E:bd01/08/2008:svnMEDIONPC:pnMS-7366:pvr2.2:rvnMEDIONPC:rnMS-7366:rvr2.2:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: MS-7366
  dmi.product.version: 2.2
  dmi.sys.vendor: MEDIONPC
  version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Wed Sep 10 19:00:35 2014
  xserver.configfile: /etc/X11/xorg.conf
  xserver.errors:

  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.15.1-0ubuntu2.1
  xserver.video_driver: radeon

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