Re: X hardware acceleration still flaky?

[Jon TURNEY <jon dot turney at dronecode dot org dot uk>]

On 08/08/2010 10:18, L.Wood@surrey.ac.uk wrote:
> Well, it's been eighteen months since I last asked:
> http://www.cygwin.com/ml/cygwin-xfree/2009-02/msg00259.html

> so I attempted to use opengl hardware acceleration with Cygwin and XFree 7.4, using Geomview (www.geomview.org) as the test application on an uptodate Cygwin 1.7 install.
>
> Lots of flickering for about thirty seconds (of correct output), but then the X server crashes. So, no visible change over previous. It's still a regression on pre-7.4.

I'm not sure what you were testing here, but I can't see how it could be 
hardware AIGLX.

xwin-gl is obsolete, an empty package since R7.4 [1], so if you are running 
that somehow, it must be an old version, which I am surprised works at all.

Alternatively, you are using xwin with software rendering, and your 
application exposes some bug in the Xserver which makes it crash.


I am happy to work with you to resolve these issues.

> Has any work been attempted on improving hardware acceleration in xwin-gl?

Yes, this is something I have been working on in my copious free time(TM):

http://cygwin.com/ml/cygwin-xfree/2009-06/msg00088.html
http://sourceware.org/ml/cygwin-xfree/2009-08/msg00021.html
http://x.cygwin.com/devel/todo.html

I hope you'll note that savi is one of the applications I've been testing with.

However, given the lack of response so far, it seems that you and me are the 
only 2 people interested in working AIGLX for XWin :-)

I wouldn't suggest testing with those binaries at this stage, as I've moved on 
a bit.  I hope to shortly make another test release containing AIGLX based on 
the upcoming Xserver 1.9, and I would very much appreciate some testing of the 
AIGLX functionality in that, when it is available.

[1] http://cygwin.com/cgi-bin2/package-grep.cgi?grep=xwin-gl

--
Jon TURNEY
Volunteer Cygwin/X X Server maintainer

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