Public bug reported:
When switching between open overlapping windows, the window you're
switching to flickers for a very short time, revealing the underlying
window during the flicker.
To reproduce:
1. Open two windows (can be any application, preferably two different
applications, for example Firefox and Thunderbird, so that the glitch is easier
to spot).
2. Use the Unity launcher to switch between the two windows (e.g. if the
Firefox windows is on top, click the Thunderbird icon to switch to Thunderbird,
and then vise versa).
Current incorrect behavior:
3. When repeating step 2, you'll notice that each time you switch to a
different window, that window flickers for a very short time. When you click an
icon in the Unity Launcher, first the corresponding window is displayed (e.g.
Firefox), than during the short flicker the underlying window is displayed
again (e.g. Thunderbird), and then it jumps back again to the window you just
opened (e.g. Firefox).
Desired correct behavior:
3. When clicking the icon for an open window in the Unity launcher, the
corresponding application should become visible without flickering.
The above problem only happens with already opened windows. And the
windows have to (partially) overlap for this to happen.
This is after a clean install of Ubuntu 11.10, updating the system, and
installing some software. I can't remember if it happened before doing
any updates/software installs.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.22.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
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 Kernel Module 280.13 Wed Jul 27 16:55:43 PDT
2011
GCC version: gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)
.tmp.unity.support.test.0:
ApportVersion: 1.23-0ubuntu3
Architecture: i386
CompizPlugins:
[core,bailer,detection,composite,opengl,decor,imgpng,gnomecompat,compiztoolbox,place,move,regex,session,resize,mousepoll,vpswitch,resizeinfo,wall,text,unitymtgrabhandles,animation,workarounds,shift,animationaddon,expo,fade,ezoom,scale,unityshell]
CompositorRunning: compiz
Date: Fri Oct 21 12:35:15 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus:
nvidia-current-updates, 280.13, 3.0.0-12-generic, i686: installed
vhba, 20110915, 3.0.0-12-generic, i686: installed
GraphicsCard:
nVidia Corporation G98M [GeForce G 105M] [10de:06ec] (rev a1) (prog-if 00 [VGA
controller])
Subsystem: CLEVO/KAPOK Computer Device [1558:0806]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111011)
JockeyStatus:
xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary,
Disabled, Not in use)
xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release
updates) (Proprietary, Enabled, In use)
MachineType: CLEVO CO. M740TU(N)/M760TU(N)/W7X0TUN
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic
root=UUID=864e0113-18ee-4251-a7a9-602665409cf6 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
XorgConf:
Section "Device"
Identifier "Default Device"
Option "NoLogo" "True"
EndSection
dmi.bios.date: 04/02/2009
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 1.02.22
dmi.board.asset.tag: Tag 12345
dmi.board.name: M740TU(N)/M760TU(N)/W7X0TUN
dmi.board.vendor: CLEVO Co.
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenixTechnologiesLTD:bvr1.02.22:bd04/02/2009:svnCLEVOCO.:pnM740TU(N)/M760TU(N)/W7X0TUN:pvrNotApplicable:rvnCLEVOCo.:rnM740TU(N)/M760TU(N)/W7X0TUN:rvrNotApplicable:cvnNoEnclosure:ct1:cvrN/A:
dmi.product.name: M740TU(N)/M760TU(N)/W7X0TUN
dmi.product.version: Not Applicable
dmi.sys.vendor: CLEVO CO.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu5
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
** Affects: unity (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug compiz-0.9 i386 oneiric running-unity ubuntu
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https://bugs.launchpad.net/bugs/879364
Title:
Flickering window when switching between open windows
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