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[Bug 709461] Re: Application windows can sometimes fail to display and will mask regions of the screen

To: compiz@xxxxxxxxxxxxxxxxxxx
From: Dmitry Shachnev <Mitya57@xxxxxxxxx>
Date: Sat, 28 May 2011 08:44:58 -0000
Reply-to: Bug 709461 <709461@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Description changed:

Binary package hint: unity

On 2 separate machines w/ updated as of 1/28 -

On rare occasions a window will open in the top left corner with top deco buried. The most likely for this to happen is a utility window like update manager.
After pulling back down into the desktop (Alt+click) it may or may not show some graphical distortion (window split in 2 parts), if so it returns to normal if opening any other window.

What does appear to happen is an invisible window is created in the
area where it was pulled down to, this only happens on the current
workspace, any others are unaffected

Attached xwininfo - first shows on affected workspace, 2nd when
switching to another and clicking in same spot

Note that this does not always happen, I'm thinking the 'buried' window
may need to show some distorttion, not sure yet

### IMPORTANT ###
This can cause the central area of the screen (where the Alt-Tab switcher is drawn) to be unclickable. This also happens on Classic desktop.
+
+ ### REPRODUCTION STEPS (thanks to glennric) ###
+ 1. Log in
+ 2. Open a terminal and move it away from the center of the screen where the switcher will appear. Make sure that it still has focus.
+ 3. Hold down Alt-Tab to activate and show the switcher.
+ 4. While the switcher is still visible move the mouse to a point right above the very bottom of the gray switcher window (it should be window title area, not thumbnails area, within 1-5 pixels of the bottom is sufficient)
+ 5. Click there. You will see that the desktop does not take focus, and the terminal window still has focus. If you run xwininfo you can click at that location and you will see information about a window that you can't see, and that is definitely not the background nautilus window.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.2.16-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-1.27-generic 2.6.38-rc2
Uname: Linux 2.6.38-1-generic i686
NonfreeKernelModules: nvidia
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86 Kernel Module 173.14.28 Wed Sep 29 09:47:25 PDT 2010
GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-2ubuntu1)
Architecture: i386
Date: Fri Jan 28 14:36:27 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
nvidia-current, 260.19.29, 2.6.37-12-generic, i686: installed
nvidia-current, 260.19.29, 2.6.38-1-generic, i686: installed
nvidia-173, 173.14.28, 2.6.37-12-generic, i686: installed
nvidia-173, 173.14.28, 2.6.38-1-generic, i686: installed
GraphicsCard: Subsystem: Dell Device [1028:0209]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110120)
InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110120)
MachineType: Dell Inc. XPS M1330
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
LC_MESSAGES=en_US.utf8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-1-generic root=UUID=28d68c1b-9e85-45a3-9ec2-ad4f992ba387 ro
ProcVersionSignature_: Ubuntu 2.6.38-1.27-generic 2.6.38-rc2
SourcePackage: unity
dmi.bios.date: 12/26/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A15
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA15:bd12/26/2008:svnDellInc.:pnXPSM1330:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: XPS M1330
dmi.sys.vendor: Dell Inc.
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10-1ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.5+6ubuntu8
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.13.2+git20110124.fadee040-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu1

** Description changed:

Binary package hint: unity

On 2 separate machines w/ updated as of 1/28 -

What does appear to happen is an invisible window is created in the
area where it was pulled down to, this only happens on the current
workspace, any others are unaffected

Attached xwininfo - first shows on affected workspace, 2nd when
switching to another and clicking in same spot

Note that this does not always happen, I'm thinking the 'buried' window
may need to show some distorttion, not sure yet

### IMPORTANT ###
This can cause the central area of the screen (where the Alt-Tab switcher is drawn) to be unclickable. This also happens on Classic desktop.

### REPRODUCTION STEPS (thanks to glennric) ###
1. Log in
2. Open a terminal and move it away from the center of the screen where the switcher will appear. Make sure that it still has focus.
3. Hold down Alt-Tab to activate and show the switcher.
- 4. While the switcher is still visible move the mouse to a point right above the very bottom of the gray switcher window (it should be window title area, not thumbnails area, within 1-5 pixels of the bottom is sufficient)
+ 4. While the switcher is still visible move the mouse to a point right above the very bottom of the gray switcher window (it should be window titles area, not thumbnails area, within 1-5 pixels of the bottom is sufficient)
5. Click there. You will see that the desktop does not take focus, and the terminal window still has focus. If you run xwininfo you can click at that location and you will see information about a window that you can't see, and that is definitely not the background nautilus window.

** Description changed:

Binary package hint: unity

On 2 separate machines w/ updated as of 1/28 -

What does appear to happen is an invisible window is created in the
area where it was pulled down to, this only happens on the current
workspace, any others are unaffected

Attached xwininfo - first shows on affected workspace, 2nd when
switching to another and clicking in same spot

Note that this does not always happen, I'm thinking the 'buried' window
may need to show some distorttion, not sure yet

### IMPORTANT ###
This can cause the central area of the screen (where the Alt-Tab switcher is drawn) to be unclickable. This also happens on Classic desktop.

### REPRODUCTION STEPS (thanks to glennric) ###
1. Log in
2. Open a terminal and move it away from the center of the screen where the switcher will appear. Make sure that it still has focus.
- 3. Hold down Alt-Tab to activate and show the switcher.
+ 3. Hold down Alt-Tab to activate and show the switcher. Sometimes you need to show the switcher twice.
4. While the switcher is still visible move the mouse to a point right above the very bottom of the gray switcher window (it should be window titles area, not thumbnails area, within 1-5 pixels of the bottom is sufficient)
5. Click there. You will see that the desktop does not take focus, and the terminal window still has focus. If you run xwininfo you can click at that location and you will see information about a window that you can't see, and that is definitely not the background nautilus window.

** Description changed:

Binary package hint: unity

On 2 separate machines w/ updated as of 1/28 -

What does appear to happen is an invisible window is created in the
area where it was pulled down to, this only happens on the current
workspace, any others are unaffected

Attached xwininfo - first shows on affected workspace, 2nd when
switching to another and clicking in same spot

Note that this does not always happen, I'm thinking the 'buried' window
may need to show some distorttion, not sure yet

### IMPORTANT ###
This can cause the central area of the screen (where the Alt-Tab switcher is drawn) to be unclickable. This also happens on Classic desktop.

### REPRODUCTION STEPS (thanks to glennric) ###
1. Log in
2. Open a terminal and move it away from the center of the screen where the switcher will appear. Make sure that it still has focus.
- 3. Hold down Alt-Tab to activate and show the switcher. Sometimes you need to show the switcher twice.
+ 3. Hold down Alt-Tab to activate and show the switcher. Sometimes you need to call the switcher twice.
4. While the switcher is still visible move the mouse to a point right above the very bottom of the gray switcher window (it should be window titles area, not thumbnails area, within 1-5 pixels of the bottom is sufficient)
5. Click there. You will see that the desktop does not take focus, and the terminal window still has focus. If you run xwininfo you can click at that location and you will see information about a window that you can't see, and that is definitely not the background nautilus window.

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https://bugs.launchpad.net/bugs/709461

Title:
Application windows can sometimes fail to display and will mask
regions of the screen