When minimizing windows, the desktop doesn't refresh leaving artifacts

[Rainer Rohde]

This does happen rather often when minimizing windows... Please see attached screen photo for an example.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.16.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
NonfreeKernelModules: nvidia wl
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 280.13 Wed Jul 27 16:53:56 PDT 2011
 GCC version: gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu2)
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,compiztoolbox,snap,gnomecompat,move,resize,imgpng,grid,vpswitch,unitymtgrabhandles,regex,place,mousepoll,session,animation,wall,fade,expo,scale,workarounds,ezoom,unityshell]
CompositorRunning: compiz
Date: Thu Sep 15 22:20:20 2011
DistUpgraded: Log time: 2011-08-23 15:43:22.596970
DistroCodename: oneiric
DistroVariant: ubuntu
GraphicsCard:
 nVidia Corporation G96 [GeForce 9600M GT] [10de:0647] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Apple Computer Inc. Device [106b:00b0]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64+mac (20110815)
JockeyStatus:
 xorg:nvidia_173 - NVIDIA accelerated graphics driver (Proprietary, Disabled, Not in use)
 kmod:wl - wl (Proprietary, Disabled, Not in use)
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
 kmod:nvidia_173 - NVIDIA binary Xorg driver, kernel module and VDPAU library (Proprietary, Disabled, Not in use)
 kmod:nvidia_current - nvidia_current (Proprietary, Disabled, Not in use)
MachineType: Apple Inc. MacBookPro5,2
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-11-generic root=UUID=e4269a1d-19f0-4d19-98fc-0bae71af3387 ro quiet splash acpi_apic acpi_apic_instance=2 vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to oneiric on 2011-09-13 (2 days ago)
XorgConf:
 Section "Device"
  Identifier "Default Device"
  Option "NoLogo" "True"
 EndSection
dmi.bios.date: 05/04/09
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP52.88Z.008E.B05.0905042202
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F2268EC8
dmi.board.vendor: Apple Inc.
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 8
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F2268EC8
dmi.modalias: dmi:bvnAppleInc.:bvrMBP52.88Z.008E.B05.0905042202:bd05/04/09:svnAppleInc.:pnMacBookPro5,2:pvr1.0:rvnAppleInc.:rnMac-F2268EC8:rvr:cvnAppleInc.:ct8:cvrMac-F2268EC8:
dmi.product.name: MacBookPro5,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz 1:0.9.5.94+bzr2803-0ubuntu5
version.ia32-libs: ia32-libs 20090808ubuntu21
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Omer Akram (om26er)]

Thanks for the bug report. This particular bug has already been reported and is a duplicate of bug 835994, so is being marked as such. Any further discussion regarding the bug should occur in the other report. Feel free to report any other bugs you may find.