Mouse clicks impossible in central region of screen

[Matt Price]

I'm running into a problem on Oneiric with my THikpad T410, in which it becomes impossible to click in a certain region of the screen -- fairly central both verticlaly and horizontel. two-finger mouse scrolling also fials to work, indictaing that there's some general mouse button override coming into play. I notice it most frequently in firefox and chrome, but once it's happened I can verify that it also is occurring e.g. in emacs. This behavious starts somewhat unpredictably but doesn't seem to halt even on e.g. resume from sleep.

Clicking is impossible with both the upper (trackpoint) and lower (trackpad) buttons on my laptop, which are associated with different pointing devices, so I don't think this is a hardware or driver problem, but of course I can't be sure.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xserver-xorg 1:7.6+7ubuntu7
ProcVersionSignature: Ubuntu 3.0.0-15.24-generic 3.0.13
Uname: Linux 3.0.0-15-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu4
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,regex,mousepoll,resize,move,grid,wall,gnomecompat,place,imgpng,vpswitch,snap,animation,expo,fade,session,workarounds,ezoom,unitymtgrabhandles,scale,switcher,unityshell]
CompositorRunning: compiz
Date: Tue Jan 24 12:28:40 2012
DistUpgraded: Log time: 2011-09-30 21:27:04.569561
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus:
 tp-smapi, 0.41, 3.0.0-12-generic, x86_64: installed
 tp-smapi, 0.41, 3.0.0-13-generic, x86_64: installed
 tp-smapi, 0.41, 3.0.0-15-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:215a]
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
 Bus 001 Device 003: ID 17ef:480f Lenovo Integrated Webcam [R5U877]
MachineType: LENOVO 2516CTO
ProcEnviron:
 PATH=(custom, user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=08517b2d-d32a-45d4-b574-a6d38f0dde9c ro crashkernel=384M-2G:64M,2G-:128M splash resume=UUID=c4088466-c2c4-4da0-821b-530b369d1fb8 vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to oneiric on 2011-10-01 (115 days ago)
dmi.bios.date: 06/07/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6IET65WW (1.25 )
dmi.board.name: 2516CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6IET65WW(1.25):bd06/07/2010:svnLENOVO:pn2516CTO:pvrThinkPadT410:rvnLENOVO:rn2516CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2516CTO
dmi.product.version: ThinkPad T410
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6
version.ia32-libs: ia32-libs 20090808ubuntu26
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.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 2:2.15.901-1ubuntu2.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Timo Aaltonen (tjaalton)]

sounds like you have an invisible window there that's eating all input when the mouse pointer is on it.

[Daniel van Vugt (vanvugt)]

It does indeed sound like an invisible window problem, which I thought was fully fixed by now...

Matt, please hit Alt+Tab and look to see if the shape/position of the switcher window matches that of the dead zone for you.

Please also run:
    xwininfo -all
Then click on the "dead" area and attach a copy of the output to this bug.

[Matt Price (matt-price)]

hmm, unfortunately, restarting compiz seems to have gotten rid of the
dead zone/invisible window. I did try xwininfo before restarting
compiz (but forgot to grab the output!), and the shape was very close
to that of the switcher window. If this problem is well-known, is there
something I can do to try to trigger the bug again, after which I will
report back w/ the xwininfo output?

[Daniel van Vugt (vanvugt)]

From memory just do Alt+Tab occasionally, but it was unpredictable. And I thought the bug was fixed (because it is for me). But not according to LaunchPad. See bug 709461.

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 709461, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

[Matt Price (matt-price)]

managed to get the problem back, but the dead zone/inviisible window is
not in this case identical to the switcher. The attached output of
xwininfo -all describes an area slightly below the switcher, slightly
shorter, and approximately the same width (I can't seem to get xwininfo
data on the switcher itself, sorry).

By bringing a full-screen terminal window to the front of the window
stack, I was able to visually trace the approximate dimensions of the
dead zone (because the cursor shape changes visibly). I also found a
second very small dead zone in the upper right quadrant -- very oddly,
the xwininfo output for that second, very small, dead zone is identical
to the output of the first window. I can't really see why that would be
the case, but am also attaching that output to this bug report.

xwininfo -all doesn't really seem like enough info to figure out which
application is responsible for spawning, then abandoning this window.
Is there anything else I can do? I'll try to hold off on restarting
compiz for a while in case you have suggestions.

matt

[Daniel van Vugt (vanvugt)]

Please paste your comments and attachments in bug 709461.