[Kst] kst-1.1.0 and svn HEAD X Errors

George Staikos staikos at kde.org
Sun Oct 9 04:58:09 CEST 2005

On Saturday 08 October 2005 18:31, Mark Hymers wrote:
> I maintain the kst packages for Debian and have run into a bit of a
> problem.  Up until recently everything worked but something in the
> KDE-3.4 transition caused previously working binaries of kst-1.1.0 to
> stop working.  I recompiled 1.1.0 in Debian unstable (against KDE 3.4)
> and it exhibited the same issue as does SVN HEAD.  Interestingly,
> kst-1.0.0 run in a test chroot shows the same symptoms after the kde
> libraries are upgraded from 3.3 to 3.4.

  I haven't seen this, but I run SuSE.

> The problem is that plots no longer display at all.  Instead, a steady
> stream of X Errors is provided relating to various operations including
> X_PolyFillRectangle and various other problems.  I've been trying to
> isolate the problem but with little success.  To be honest, I'm
> surprised that no-one else has hit it!

> X Error of failed request:  RenderBadPicture (invalid Picture parameter)
>   Major opcode of failed request:  155 (RENDER)
>   Minor opcode of failed request:  7 (RenderFreePicture)
>   Picture id in failed request: 0x1a00b40
>   Serial number of failed request:  40992
>   Current serial number in output stream:  43195
> Does anyone have any suggestions from here on?  I suspect I'll need to
> do backtraces and all that but was hoping someone might have an obvious
> suggestion before starting down that road.

  Yes I need to see a backtrace.  You can set a breakpoint in kde_x_errhandler 
and kde_xio_errhandler to help with that.  It sounds like a broken Qt or a 
multithreading bug in Kst.  I would be surprised if it's a multithreading bug 
in Kst though.  We would have noticed it already.

George Staikos
KDE Developer				http://www.kde.org/
Staikos Computing Services Inc.		http://www.staikos.net/

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