When system freezes for a long time, grayscaled windows don't become back to color

[Nicholas Shatokhin]

Windows stay in gray-scale until I don't close it and run again.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.12-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
.tmp.unity.support.test.0:

ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,compiztoolbox,snap,colorfilter,text,workarounds,neg,copytex,annotate,clone,commands,gnomecompat,move,place,regex,resize,rotate,screenshot,imgpng,water,zoom,grid,imgsvg,unitymtgrabhandles,expo,winrules,kdecompat,session,vpswitch,mousepoll,shift,ezoom,resizeinfo,mag,switcher,thumbnail,wall,ring,fade,scale,unityshell,scaleaddon,opacify]
CompositorRunning: compiz
Date: Mon May 21 17:27:14 2012
DistUpgraded: 2012-04-27 13:58:27,499 DEBUG enabling apt cron job
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 4.1.12, 3.0.0-17-generic-pae, i686: installed
 virtualbox, 4.1.12, 3.2.0-24-generic-pae, i686: installed
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0042] (rev 18) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:8383]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: System manufacturer System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-24-generic-pae root=UUID=a4cb5a27-10a2-4ca3-8de3-2703f24cd560 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-04-27 (24 days ago)
dmi.bios.date: 08/18/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1101
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P7H55-M
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1101:bd08/18/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP7H55-M:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.7.8-0ubuntu1
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2