Firefox 3 displays pieces of desktop background

[Kevin Oberman]

> Date: Mon, 17 Nov 2008 09:55:16 -0700 (MST)
> From: Warren Block <wblock at wonkity.com>
> 
> On Mon, 17 Nov 2008, Kevin Oberman wrote:
> 
> >> Date: Mon, 17 Nov 2008 07:11:57 +0100
> >> From: Christoph Moench-Tegeder <cmt at burggraben.net>
> >> Sender: owner-freebsd-x11 at freebsd.org
> >>
> >> ## Mark Kirkwood (markir at paradise.net.nz):
> >>
> >>> I'm on 7.1 Prerelease refreshed a few days ago. I've noticed that
> >>> Firefox 3 (3.0.4, but 3.0.3 was the same) displays snippets from ones
> >>> desktop on some webpages (yahoo and youtube being the 2 most recent).
> >>
> >> Image rendering was optimized in Firefox 3, so it breaks with a lot
> >> of xservers (seems as if some pixmap rendering code is broken in X
> >> and firefox triggers that problem).
> >> Try setting Option "XaaNoOffscreenPixmaps" to "true" in the "Device"
> >> section of your xorg.conf.
> >
> > Christoph,
> >
> > Thank yo so much for this suggestion.
> >
> > I have been annoyed by this odd problem since I started using Firefox3
> > and this finally make things work correctly. I think this needs to be in
> > a FAQ somewhere until/unless the Xorg driver is fixed.
> >
> > In any case, I was seeing this with an ATI Radeon X300 M22 graphics
> > chipset. I don't seem to see it with my nVidia GeForce 7800 GT based
> > system. I don't THINK I see it with my old MGA Matrox G450  , but I
> > won't have my eyeballs in front of that system until next month, si I am
> > not sure.
> >
> > Anyone seeing this with any other graphics device that does not use the
> > RADEON driver?
> 
> Happened on my MGA G450.  Removing the XaaNoOffscreenPixmaps option from 
> xorg.conf shows that some scaled images in Firefox3 3.0.4,1 still render 
> as either black boxes or partly black.  It used to also show the desktop 
> background in some windows, but I didn't see that in a quick check.
> 
> -Warren Block * Rapid City, South Dakota USA

Thanks, Warren.

Some day I'll replace that ancient system (a Pentium-III) with something
more modern, but thanks to you, the G450 keeps doing the job for me.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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