QPixmap::handle(): Pixmap is not an X11 class pixmap

Hugo Pereira Da Costa hugo at oxygen-icons.org
Mon May 2 15:39:23 BST 2011

Le 05/02/2011 04:33 PM, Christoph Feck a écrit :
> On Monday 02 May 2011 16:15:42 Wolfgang Rohdewald wrote:
>> since updating to kubuntu 11.04 I am getting this message
>> while KApplication is created, but only if I use raster or opengl
>> as graphics system:
>> kpat --graphicssystem raster
>> QPixmap::handle(): Pixmap is not an X11 class pixmap
>> this seems to happen with all KDE programs.
>> Any idea?
>> kdelibs 4.6.2
>> qt 4.7.2

What's the widget style you are using ?

> I remember a recent discussion in #qt-labs about this, and I think it has
> already been fixed in Qt 4.8 branch.
> The issue, if I understood the discussion correctly, is that even while you
> are setting a non X11 backend, it is still possible for applications to create
> an X11 native QPixmap via the fromX11Pixmap() function, but the checks in Qt
> "forgot" that case.
> Those checks were added to make sure applications don't try to access the
> underlying X11 pixmap so that changing the default backend to raster (or
> opengl) is possible for a future version of Qt.
> In other words, you likely don't need to worry about that warning, unless your
> application breaks because of it.
> On the other hand, I am highly interested why kpat tries to use X11 pixmaps at
> all. Adding kde-games-devel.
> Christoph Feck (kdepepo)

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