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    #1

    mouse lost click ability in KDE

    Kubuntu 8.04 or Kubuntu 7.10
    KDE 3.5.8 or 3.5.9
    Nvidia Quadro FX1400 or FX3450
    Nvidia proprietary driver installed version 169.12
    All current patches applied
    Intel P4 or Intel CoreDuo

    When Firefox is open, version 2 or the beta 3 (tried firefox beta in Kubuntu 8.04), and using a 3D accelerated program called Maestro from www.schrodinger.com, I find the mouse will occasionally lose the ability to select anything. The cursor is under control. The 3D enabled application will be running at 100% CPU. The only error message I've captured so far is this:

    Warning:
    Name: menubar
    Class: XmRowColumn
    Can't grab the pointer.

    I can't reproduce this problem on a system with the same software but having the Nvidia Geforce video cards. I know the Schrodinger app has a problem with XCB and requires the variable LIBXCB_ALLOW_SLOPPY_LOCK= to be set or problems will occur on starting the app. Any advice on how to troubleshoot this more thoroughly? I'd like to send a bug report to the Schrodinger, the Nvidia, or the Mozilla developers but so far don't have enough info.

    I have found on Hardy Heron that if I can switch to a terminal from X or ssh in from a remote machine to kill the schrodinger app and firefox, the desktop will recover. Under Gutsy Gibbon, that would not recover the KDE environment. I would have to restart X and KDE to get a working KDE desktop in Gutsy. This bug has occurred on two different Dell Precision workstations with the above versions of Kubuntu.
    Best wishes,
    Dow

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    #2
    Re: mouse lost click ability in KDE

    The first place I'd look for information is in /var/log/Xorg.0.log. I'd look for something saying "(EE)" at the beginning of the line. Failing that, I'd look at the very end of the log and see what's there.

    As a general comment, Schrodinger seems like a Linux friendly supplier. So I'd try to contact their tech support and see what they have to say.
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      #3
      Re: mouse lost click ability in KDE

      The same with me, if I start gazebo some times and close it. Gazebo is a 3D robot simulator. If that happens (mouse still moves but clicking, etc is not possible any more) I have to restart X and it works again.

      KDE 4.1.3
      Linux 2.6.27-9-generic
      Xorg dual display with Xinerama (no compiz)
      NVIDIA driver version: 177.80
      Xorg server vendor version: 1.5.2
      Nvidia Quadro NVS 110M



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        #4
        Re: mouse lost click ability in KDE

        wr,
        I did find that enabling compiz made the problem go away. You do have to have compiz and emerald installed along with having the nvidia restricted driver enabled. If you can use System | Preferences | Appearance | Visual Effects | Normal enabled then that will enable compiz automatically if it is installed.

        I also had twin LCD screens to configure but you may not.

        Use compiz_check.sh to find out if the Composite Extension is activated (http://forlong.blogage.de/article/pages/Compiz-Check). Needed packages to make accelerated X work on the Dell Precisions with the Composite Extension:


        Compiz

        Xorg

        Nvidia proprietary driver

        Emerald


        Specific packages I had not installed that were needed:

        sudo apt-get install nvidia-settings

        sudo apt-get install compizconfig-settings-manager

        sudo apt-get install emerald


        Commands to configure Xorg and Nvidia for a correct xorg.conf file:

        sudo dpkg-reconfigure xserver-xorg (this gets a vanilla xorg.conf setup for the next command)

        sudo nvidia-xconfig --twinview (configures Twinview properly)


        Even a Geforce 6200TC will work well with all this on maximum compiz effects. The LCD EDIDs were read correctly and I had an accelerated desktop setup for both monitors. In KDE when configuring Compiz you must disable scaling effects in the compizconfig-settings-manager and start compiz with:


        compiz --replace --ignore-desktop-hints


        To put this in the background and have it start on KDE login is unknown as of yet. Gnome doesn't require scaling effects to be turned off. I had thought the GeForce cards were necessary, however, I found that a Nvidia Quadro FX3450 works great after this procedure! KDM and GDM with KDE or Gnome will work fine. If Compiz is enabled, you can have the spinning 3D cube with many desktops and Maestro is perfectly happy. I tried displaying tubes, Molecular surfaces, and h-bonds simultaneously and was able
        to run Maestro with no glitches.
        Hope this helps,
        Dow
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