Re: [Plplot-general] X protocol errors

[Simon P. T. <sim...@ip...>]

Thanks for your helpful reply.

"Alan W. Irwin" <ir...@be...> writes:

> I cannot confirm this error on my Debian woody i686 system with KDE-2.2.1
> and XFree86-4.1.0.  My system has a Matrox video card, and by default I use
> 24-bit colour. plrender works fine with no protocol errors whether or not
> you specify the -nopixmap option.  I am using the latest cvs version of
> plplot, but I am fairly sure there should also be no problem in 5.0.4
> because I don't remember any such bug fixes since 5.0.4. What version of
> plplot are you using?

I'm using version 5.0.4 and have no problems on my SuSE i686 system
with KDE 2.2.1.  However on my Sun, unless I set the default colour
depth to 24 bits KDE is only rendered in 8 bits.

> If you are using 5.0.4 (or later cvs) I suspect there should be no problem
> on the plplot side.  In this case, you might simply have a 24-bit colour
> problem with your particular X server. If you are using XFree86, they have a
> pretty good track record of fixing bugs, and I would recommend getting the
> latest version.  OTOH, if you are using some proprietary X server, you you
> may have to stick with 16-bit or something smaller.  (I haven't tried it,
> but I would be quite surprised if KDE demanded you use 24-bit colour.)

It doesn't demand it, but it looks a lot better with it :-)

> Another possibility is to try 32-bit colour (which I understand is really
> 24-bits + 8 unused bits, but 4 bytes is inherently less complicated for an X
> driver to use than a 3-byte format.)

32-bit colour isn't supported by my Xsun X server.

I should point out that if I leave the default colour depth as 8 bits
then plrender works fine.  It is only if I change it to 24 bits (and
thereby persuade KDE to render everything in 24 bit colour) that
plrender has problems.  Interestingly, all other applications seem to
work just fine.

I guess I have to choose between having a nice 24-bit colour window
manager and having to view postscript output produced with plrender,
or having an 8 bit window manager and being able to render plplot meta
files directly to the screen (which is a lot faster.)
-- 
Simon Pinches

-----------------------------------------------------------------------
Dr. S. D. Pinches                 Max-Planck-Institut fuer Plasmaphysik 
Tel: +49 89 3299-1329		  Boltzmannstrasse 2                    
Fax: +49 89 3299-2580		  D-85748 Garching-bei-Muenchen
Email: Sim...@ip...   Germany
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> On Tue, 6 Nov 2001, Simon Pinches TOK wrote:
> 
> > Dear all,
> >
> > Since I've starting using KDE as my window manager on my SUN Ultra
> > Sparc running Solaris 8 it has been necessary to run my X server such
> > that it defaults to using 24 bit TrueColour.  The downside of this is
> > that plrender now produces a whole slew of X protocol errors:
> >
> > plrender -dev xwin -nopixmap hagis.pl
> >
> > X protocol error: error=8 request=1 minor=0
> > X protocol error: error=3 request=18 minor=0
> > X protocol error: error=3 request=18 minor=0
> > X protocol error: error=3 request=18 minor=0
> > X protocol error: error=3 request=2 minor=0
> > X protocol error: error=9 request=55 minor=0
> > X protocol error: error=9 request=55 minor=0
> > X protocol error: error=9 request=14 minor=0
> > X protocol error: error=3 request=2 minor=0
> > X protocol error: error=3 request=2 minor=0
> > X protocol error: error=3 request=12 minor=0
> > X protocol error: error=3 request=8 minor=0
> >
> > Does anyone know how to cure these?
> >
> > Note also that if I don't include the -nopixmap option then I also get
> > the error message:
> >
> > Error in XCreatePixmap: BadDrawable (invalid Pixmap or Window parameter).
> >
> > Many thanks in advance for any help anyone can offer me,
> > --
> > Simon Pinches