On Sat, May 28, 2011 at 10:13 AM, glennric <709...@bugs.launchpad.net> wrote:
> Sam Spilsbury:  Are you looking for a surefire way to reproduce the mouse 
> dead zone?  Because I can tell you exactly how to do it with the default 
> settings for either the Ubuntu Classic or the default Ubuntu desktops.
> 1.   Log in.
> 2.  Open a terminal from the menu, 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.  Within a pixel or two 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.

Ah, I can see this one. Thanks. It's a different issue to the *actual*
invisible window bug (might be worth filing a separate bug over this)
but I know what's going on, thanks for that.

>
> I have noticed that this happens with both the "Static Application
> Switcher" and the "Application Switcher" compiz plugins, however it does
> not happen with the other switcher plugins.  Perhaps because those do
> not use override redirect windows?  It happens regardless of if you are
> using the unity-window-decorator or the gtk-window-decorator.
>

The switcher window is override redirect, so I don't really see the
problem here. I hink what's happening is that we don't unmap the frame
window we give it.

> Interestingly, if you repackage emerald with the current code from the
> git repository (since the package from the natty repositories
> segfaults), it is unaffected by this mouse dead zone bug.

I'm surprised that it even works with the new decoration interface.

>
> --
> You received this bug notification because you are a bug assignee.
> https://bugs.launchpad.net/bugs/709461
>
> Title:
>  Application windows can sometimes fail to display and will mask
>  regions of the screen
>
> Status in Unity:
>  Triaged
> Status in “compiz” package in Ubuntu:
>  Triaged
> Status in “unity” package in Ubuntu:
>  Triaged
> Status in “compiz” source package in Natty:
>  Triaged
> Status in “unity” source package in Natty:
>  Triaged
> Status in “compiz” package in Fedora:
>  New
>
> Bug description:
>  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.
>
>  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
>


-- 
Sam Spilsbury

-- 
You received this bug notification because you are a member of Ubuntu
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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

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