Mouse click unresponsive until Alt-[key] pressed

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Viewing 8 posts - 1 through 8 (of 8 total)
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  • #17196
    vnaipaul
    Participant

    Hi,

    We are seeing a problem with our apps not responding to mouse clicks occasionally, only to become responsive again after an Alt-[key] combination (at which point a menu drops as expected), as if the Alt-[key] combination is resetting something … a mouse event queue hitting limits ?

    This problem was pretty bad under v5.3.10, and while its improved under v6, its still pretty disruptive.

    Does anyone recognize this ?

    Maybe related … we also have poor double-click responsiveness in general, as if the DE mouse-double-click-interval is ignored (yet Xfce’s double-click ‘lightbulb’ test behaves as expected).

    Thanks,

    Val

    • NoMachine Enterprise Terminal Server (eval) v6.0.66 on CentOS-6
    • NoMachine Terminal Server Node (eval) v6.0.66 on CentOS-6, Xfce 4.8 + xfwm4, virtual desktop
    • Windows 8 + Firefox (~v50)
    #17211
    graywolf
    Moderator

    Did you experience that with generic Xfce apps or something more specific?

    #17225
    vnaipaul
    Participant

    Its with our own Qt-based app–its a fairly mature product.

    Good point, it occurred to me yesterday that a baseline would be useful too, I started playing with Xfce’s terminal app:  no signs of the problem there but I might not have been using it for long enough for the problem to show up.

    #17226
    vnaipaul
    Participant

    Correction about the test client machine:  Windows 7 Pro (SP1) + Firefox 52.5.3 (32-bit) with 8GB memory.

    #17276
    graywolf
    Moderator

    All the symptoms make me think that the Qt app didn’t release a mouse grab.

    Which is the Qt version in use?

    #17278
    vnaipaul
    Participant

    Good lead … the Qt libs are unresolved (ldd reports “not found”).

    I’m pretty sure I didn’t install this app properly come to think, and I didn’t install Qt I’m sure, though it more or less works otherwise (maybe it has a fallback if Qt isn’t available ?).  This aligns with us not seeing this problem outside of this NoMachine deployment.

    Comparing to a properly installed version btw, ldd reports libQt* v4, which resolves to v4.6.2.

    I’ll reinstall and retest.

    Thanks graywolf.

    #17388
    vnaipaul
    Participant

    I think this has been resolved after a proper re-install of our Qt app:  the Qt libs shipped with the product were being found it turned out (there was no fallback), but there were other unresolved libraries that are now found.

    And the double-click responsiveness was a separate issue–I had to change the threshold in the xfce-perchannel-xml file.

    #17392
    graywolf
    Moderator

    Happy that your problem is solved. Thanks for letting us know!

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