Bug#807528: vlc: after some time, clicks on the root window no longer work

[Sebastian Ramacher]

On 2015-12-10 11:31:47, Vincent Lefevre wrote:
> On 2015-12-10 10:34:01 +0100, Sebastian Ramacher wrote:
> > Are you that this is a bug in vlc and not Qt 5, your window manager
> > or X.Org?
> 
> I don't know. I'm on another machine, and the problem is reproducible
> on it. Since the mouse is attached on the USB hub of the screen, I can
> do this either by unplugging the mouse USB cable or by switching off
> the screen and back on. In the latter case, if I do this while the
> VLC window isn't visible (I'm on another desktop page) and go to the
> VLC page again, the VLC window contains garbage, and if I click on it,
> VLC crashes (segmentation fault) in QXcbScreen::mapFromNative in
> libQt5XcbQpa.so.5.5.1 (I can give more details later). Should I report
> a new bug for this?

This sound very similar to #790825. Are you able to reproduce the issues with
the test program posted there?

In any case, please provide the vlc logs and install vlc-dbg and qtbase5-dbg and
attach the backtrace.

Cheers

> 
> > Are you able to reproduce the issue with a USB mouse with a
> > non-broken cable?
> 
> Yes, and even on a different machine (see above).
> 
> > In any case, this is missing logs from vlc and probably X.Org and dmesg.
> 
> In X.org log, something like:
> 
> [259110.094] (II) config/udev: removing device Logitech USB Optical Mouse
> [259110.108] (II) evdev: Logitech USB Optical Mouse: Close
> [259110.108] (II) UnloadModule: "evdev"
> 
> Ditto on the other machine.
> 
> dmesg output:
> 
> [259110.065413] usb 3-6: USB disconnect, device number 22
> [259110.065419] usb 3-6.2: USB disconnect, device number 23
> [259110.112570] usb 3-6.4: USB disconnect, device number 24
> [259110.276091] usb 4-5: USB disconnect, device number 14
> [259110.276097] usb 4-5.4: USB disconnect, device number 15
> 
> -- 
> Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
> 
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-- 
Sebastian Ramacher
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