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Date: Tue, 24 Aug 2010 10:50:55 -0600
From: John Hein <jhein@symmetricom.com>
To: mi@aldan.algebra.com
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Cc: Ivan Klymenko <fidaj@ukr.net>, kde@FreeBSD.org, x11@FreeBSD.org
Subject: Re: cairo-dock vs. smplayer: XLIB_SKIP_ARGB_VISUALS=1
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mi@aldan.algebra.com wrote at 18:29 -0400 on Aug 23, 2010:
 > We are having the same problem described here:
 > 
 >     http://smplayer.berlios.de/forums/viewtopic.php?id=979
 >     http://www.qtforum.org/article/26669/qt4-mess-up-the-opengl-context.html
 > 
 > and the same work-around (set environment variable 
 > XLIB_SKIP_ARGB_VISUALS=1) helps. What's the downside of setting this 
 > variable? Any chance we can fix this in FreeBSD so that the work-around 
 > is not necessary? Thanks! Yours,

http://www.x.org/archive/X11R6.8.0/doc/RELNOTES5.html#40

As I understand it, if you aren't using compositing, there should be
no downside to setting it.  If you are, then setting it can interfere
with image compositing (but you can decide to set that env var per
application).

I don't have any information how this interacts with qt (or will in
the future).  Perhaps someone on the kde list can speak to that.