First viewport darkens in the live preview when switching viewports in desktop wall

[pablomme]

Binary package hint: compiz

Instructions to reproduce:
- Press Ctrl-Alt-Right from the first workspace, and keep holding Ctrl-Alt.
- The viewport preview (which is in "live preview" mode by default) remains on screen. When the animation finishes, the top-left viewport preview will darken, as in the attached screenshot.

This does not happen if there is a bubble notification active, for some reason. A few weeks ago this affected all viewports, but after an update it started happening to only one of them.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: compiz 1:0.9.4+bzr20110411-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
.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 270.30 Fri Feb 25 14:34:55 PST 2011
 GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu1)
Architecture: amd64
CompizPlugins: [core,crashhandler,detection,composite,opengl,decor,imgsvg,resize,resizeinfo,mousepoll,wall,regex,animation,place,blur,compiztoolbox,text,session,grid,put,imgpng,imgjpeg,dbus,gnomecompat,commands,copytex,wobbly,annotate,titleinfo,move,workarounds,shift,loginout,scale,unitymtgrabhandles,expo,scalefilter,scaleaddon,ezoom,staticswitcher,unityshell,bench]
CompositorRunning: compiz
Date: Tue Apr 12 12:24:25 2011
DistUpgraded: Log time: 2011-03-03 20:05:16.908415
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus: nvidia-current, 270.30, 2.6.38-8-generic, x86_64: installed
GraphicsCard:
 nVidia Corporation ION VGA [GeForce 9400M] [10de:0876] (rev b1) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:8402]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110301.1)
InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110301.1)
JockeyStatus: xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
Lsusb:
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 002: ID 13d3:5126 IMC Networks
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK Computer INC. 1201N
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=56551fbd-03c7-48af-b7f4-c8f165bc66ed ro acpi_brightness=vendor quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Renderer: Unknown
SourcePackage: compiz
UpgradeStatus: Upgraded to natty on 2011-04-11 (0 days ago)
XorgConf:
 Section "Device"
  Identifier "Default Device"
  Option "NoLogo" "True"
 EndSection
dmi.bios.date: 04/29/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0326
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1201N
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0326:bd04/29/2010:svnASUSTeKComputerINC.:pn1201N:pvrx.x:rvnASUSTeKComputerINC.:rn1201N:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: 1201N
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.
version.compiz: compiz 1:0.9.4+bzr20110411-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu12
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[pablomme (pablomme)]

This bug changed in oneiric: instead of the first workspaces becoming darker, all of them become transparent (as if live previews was only active during desktop moves).

However this behaviour has disappeared with today's unity updates, and it works normally now. Will flag this as Fix Released.