minimized windows - sometimes white rectangles are shown instead of window previews

Bug #869628 reported by Alistair Buxton on 2011-10-07
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Unity
Confirmed
Undecided
Unassigned
unity (Ubuntu)
Undecided
Unassigned

Bug Description

I have no idea what causes this. It just happens randomly. See screenshot. They should all be terminal windows.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.22.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-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 280.13 Wed Jul 27 16:53:56 PDT 2011
 GCC version: gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu2
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,resize,snap,place,mousepoll,move,gnomecompat,grid,vpswitch,imgpng,wall,session,unitymtgrabhandles,regex,animation,expo,workarounds,fade,ezoom,scale,unityshell]
CompositorRunning: compiz
Date: Fri Oct 7 01:46:17 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus: nvidia-current, 280.13, 3.0.0-12-generic, x86_64: installed
GraphicsCard:
 nVidia Corporation GT215 [GeForce GT 240] [10de:0ca3] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Giga-byte Technology Device [1458:34e2]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110921.2)
JockeyStatus:
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
 xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
MachineType: System manufacturer System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=e201088a-cec2-4b74-a583-bc7991dabd32 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/25/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0704
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A79XTD EVO
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.:bvr0704:bd11/25/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A79XTDEVO:rvrRevX.0X:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu3
version.ia32-libs: ia32-libs 20090808ubuntu25
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

Alistair Buxton (a-j-buxton) wrote :
Alistair Buxton (a-j-buxton) wrote :

Note, this happens with other programs than gnome terminal, including firefox.

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in unity (Ubuntu):
status: New → Confirmed
ubuntuuser (fancker) wrote :

Actually it happens with Firefox every time I minimize a Firefox window.

Omer Akram (om26er) wrote :

I does not happen every time, If there are any specific steps to reproduce this problem those will be very helpful for us to get it fixed in Ubuntu.

Changed in unity:
status: New → Incomplete
Changed in unity (Ubuntu):
status: Confirmed → Incomplete
summary: - White rectangles instead of window previews in switcher.
+ minimized windows - sometimes white rectangles are shown instead of
+ window previews
Alistair Buxton (a-j-buxton) wrote :

I can consistently reproduce this bug as follows:

1. Open a terminal window.
2. Maximize it.
3. Minimize it.
4. Switch to workspace 2 (ctrl-alt-right)
5. Middle click terminal launcher to open a new window.
6. Left click terminal launcher to show spread.

The window from workspace 1 now shows the white rectangle.

Changed in unity (Ubuntu):
status: Incomplete → Confirmed
Changed in unity:
status: Incomplete → Confirmed
ubuntuuser (fancker) wrote :

OK, you are right it only happens when I minimize a maximized firefox window.

ubuntuuser (fancker) wrote :

I tried somewhat more and it seem to behave this way for Firefox and Chrome:

Firefox
- minimize a maximized window -> always white rectangle
- minimize a smaller window -> never white rectangle

Chrome
- minimize a maximized window -> always white rectangle
- minimize a smaller window -> every second try white rectangle

Alistair Buxton (a-j-buxton) wrote :

This bug is still present in Precise and Unity 5.2rc1.

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