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Bug#525317: [Pkg-virtualbox-devel] Bug#525317: Bug#525317: virtualbox-ose-qt: graphics corruption in QT frontend



> > Those grey lines that show up when the machine is paused have been around for
> > a while.  I think it's normal behavior.  I've never really messed with
> > vboxgtk, so I can't speak for it.
> I do see similar behaviour in other QT applications like konsole. So I'd say
> it's not a virtualbox-ose issue.

Konsole works for me. The grey lines are likely not a symptom of the bug I'm
seing, rather the only situation in which vboxqt manages to grab the vm screen
correctly.

> >From what I gathered from the net and my own tests this seems to be QT related.
> Any yes, it hits more packages than just virtualbox-ose.
> 
> The sources pointed me to this small fix
> http://websvn.kde.org/trunk/qt-copy/patches/0279-svg-rendering-regression.diff?revision=958573&view=markup.
> If this indeed is the problem I'd guess the package is libqt4-svg, not sure
> though as I haven't tested it myself.
> 
> Also I increased the severity because I think libqt4 should not migrate with
> this kind of bug. Feel free to change if you don't agree. :-)

It may be a bug in a qt library, but I fail to see the connection to svg. The
screen is drawn by virtualbox and not correctly displayed by the qt frontend
(except when pausing).

I restarted my system today, and the first run of vboxqt was working. After
that, corrupted screen again.

I'll attach screenshots to illustrate what I'm talking about.

Both screenshots show a Windows XP with the My Computer window opened. The
background is set to red (#ff0000). Paused that looks quite ok, but running...
only a few icons and other gui parts are shown somewhat correctly, but mainly it
shows random crap. I don't know where it got that grey from that occupies most
of the screen, but the stuff at the top is my firefox menu/tab bar.

Switching between fullscreen and windowed mode repaints the window with new
corruption, sometimes from its own window, sometimes from others.

Best regards,
Christian Ohm

Attachment: vboxqt-paused.png
Description: PNG image

Attachment: vboxqt-corrupt.png
Description: PNG image


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