Public bug reported:

dmesg | egrep 'drm|radeon'

gives  --- *ERROR* conflict detected with stolen region

sudo update-pciids #optional command, requires internet
lspci -nn | grep VGA

gives -- 01:00.0 VGA compatible controller [0300]: Advanced Micro
Devices, Inc. [AMD/ATI] Juniper PRO [Radeon HD 5750] [1002:68be]

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8.1
ProcVersionSignature: Ubuntu 3.16.0-39.53~14.04.1-generic 3.16.7-ckt11
Uname: Linux 3.16.0-39-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Thu Jun 11 18:12:30 2015
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Subsystem: Gigabyte Technology Co., Ltd Device [1458:d000]
 Advanced Micro Devices, Inc. [AMD/ATI] Juniper PRO [Radeon HD 5750] 
[1002:68be] (prog-if 00 [VGA controller])
   Subsystem: XFX Pine Group Inc. Device [1682:2986]
InstallationDate: Installed on 2015-06-10 (0 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
MachineType: Gigabyte Technology Co., Ltd. Z68AP-D3
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-39-generic 
root=UUID=819060e8-45dd-405b-b40d-85174dd3cb96 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/21/2012
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F8
dmi.board.name: Z68AP-D3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: 
dmi:bvnAwardSoftwareInternational,Inc.:bvrF8:bd03/21/2012:svnGigabyteTechnologyCo.,Ltd.:pnZ68AP-D3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnZ68AP-D3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: Z68AP-D3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.60-2~ubuntu14.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri N/A
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Thu Jun 11 14:07:52 2015
xserver.configfile: default
xserver.devices:
 input        Power Button         KEYBOARD, id 6
 input        Power Button         KEYBOARD, id 7
 input        Microsoft Microsoft® 2.4GHz Transceiver v8.0 KEYBOARD, id 8
 input        Microsoft Microsoft® 2.4GHz Transceiver v8.0 KEYBOARD, id 9
 input        Microsoft Microsoft® 2.4GHz Transceiver v8.0 KEYBOARD, id 10
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.16.0-1ubuntu1.2~trusty2
xserver.video_driver: radeon

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 performance trusty ubuntu

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https://bugs.launchpad.net/bugs/1464388

Title:
  Cursor flickers & disappears.

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