It affects unusual end-user set up.

** Changed in: compiz (Ubuntu)
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1252078

Title:
  Rotate: switching to a workspace with open window causes white line
  below window deco

Status in “compiz” package in Ubuntu:
  Confirmed

Bug description:
  Only affects rotate/cube

  Test case:
  With rotate, cube enabled, best seen with ambiance theme

  Open a nautilus, firefox or any window that has dark toolbar
  Switch to another Ws, then switch back to workspace with open above window
  There will be a whiteish line between deco & toolbar, it disappears after ws 
is fully loaded

  Seems to be related to OpenGl > texture filter on either the default of 
"Good" or "Best" options
  Seen on both a nvidia (nouveau driver) & intel 4000 

  Workaround: set texture filter to "Fast", then no line appears

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: compiz-plugins 1:0.9.10+13.10.20131011-0ubuntu1
  ProcVersionSignature: Ubuntu 3.12.0-2.7-generic 3.12.0
  Uname: Linux 3.12.0-2-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.12.6-0ubuntu1
  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
  CurrentDmesg:
   [   23.692001] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type 
mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
   [   23.692172] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type 
mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
   [   40.634900] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type 
mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
   [   40.635014] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type 
mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
   [   75.351637] systemd-hostnamed[2357]: Warning: nss-myhostname is not 
installed. Changing the local hostname might make it unresolveable. Please 
install nss-myhostname!
  Date: Sun Nov 17 15:51:36 2013
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  GraphicsCard:
   Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] 
(rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:3977]
   NVIDIA Corporation GK107M [GeForce GTX 660M] [10de:0fd4] (rev a1) (prog-if 
00 [VGA controller])
     Subsystem: Lenovo Device [17aa:3977]
  InstallationDate: Installed on 2013-11-17 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131115)
  MachineType: LENOVO 2099
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.12.0-2-generic 
root=UUID=4e8ccc21-e997-457f-8021-d0faf84f94f7 ro quiet splash vt.handoff=7
  SourcePackage: compiz
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/10/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 5DCN40WW(V2.07)
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Product Name
  dmi.board.vendor: LENOVO
  dmi.board.version: Mainboard version
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo IdeaPad Y580
  dmi.modalias: 
dmi:bvnLENOVO:bvr5DCN40WW(V2.07):bd10/10/2012:svnLENOVO:pn2099:pvrLenovoIdeaPadY580:rvnLENOVO:rnProductName:rvrMainboardversion:cvnLENOVO:ct10:cvrLenovoIdeaPadY580:
  dmi.product.name: 2099
  dmi.product.version: Lenovo IdeaPad Y580
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.46-4
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.2-1ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.2-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.14.3-3ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.10-1ubuntu1
  xserver.bootTime: Sun Nov 17 15:47:46 2013
  xserver.configfile: default
  xserver.errors:
   Failed to load module "nvidia" (module does not exist, 0)
   Failed to load module "nvidia" (module does not exist, 0)
   NOUVEAU(G0): [XvMC] Failed to initialize extension.
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                 489 
   vendor                                     LGD
  xserver.version: 2:1.14.3-3ubuntu4

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