Public bug reported:

monitor randomly goes black for 5 seconds or so, then returns. audio
keeps playing however and nothing closes. this is only since upgrade
from 14.04 to 14.10

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: xorg 1:7.7+7ubuntu2
ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
Uname: Linux 3.16.0-23-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.7-0ubuntu8
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: Sat Oct 25 04:21:35 2014
DistUpgraded: 2014-10-24 01:09:01,677 DEBUG enabling apt cron job
DistroCodename: utopic
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] RS880 [Radeon HD 4200] [1002:9710] 
(prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:2ab1]
InstallationDate: Installed on 2014-04-05 (203 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: Hewlett-Packard p7-1074
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-23-generic 
root=UUID=da7fd3f7-ad2e-4d94-818a-023ca98be938 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to utopic on 2014-10-24 (1 days ago)
dmi.bios.date: 06/29/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 6.08
dmi.board.name: 2AB1
dmi.board.vendor: FOXCONN
dmi.board.version: 1.00
dmi.chassis.asset.tag: MXX13109RW
dmi.chassis.type: 3
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr6.08:bd06/29/2011:svnHewlett-Packard:pnp7-1074:pvr:rvnFOXCONN:rn2AB1:rvr1.00:cvnHewlett-Packard:ct3:cvr:
dmi.product.name: p7-1074
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.914-1~exp1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Fri Oct 24 01:10:32 2014
xserver.configfile: default
xserver.devices:
 input        Power Button         KEYBOARD, id 6
 input        Power Button         KEYBOARD, id 7
 input        Logitech Unifying Device. Wireless PID:1028 MOUSE, id 8
 input        Chicony Saitek Eclipse Keyboard KEYBOARD, id 9
 input        Chicony Saitek Eclipse Keyboard KEYBOARD, id 10
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.16.0-1ubuntu1
xserver.video_driver: radeon

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


** Tags: amd64 apport-bug compiz-0.9 ubuntu utopic

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https://bugs.launchpad.net/bugs/1385604

Title:
  screen blanks for 5 seconds or so

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