[Xquartz-dev] X11 hangs

[Mike Krogh]

Greetings,

We've have been experiencing hangs with our X11/OpenGL based  
application under Leopard.  I gave the 2.2.0.1 Xquartz package a try  
minutes ago on my MacBook and still see the hang.   The hang typically  
occurs when our app is driving OpenGL hard while periodically polling  
X11.  Here's a current traceback:

0x93b4f9e6 in mach_msg_trap ()
(gdb) where
#0  0x93b4f9e6 in mach_msg_trap ()
#1  0x93b571dc in mach_msg ()
#2  0x90faa632 in io_connect_map_memory ()
#3  0x15356fb2 in GhalInterface::getCommandBuffer ()
#4  0x153901e8 in GHAL3D::CPrivateCommandTransport::FlushCommandBuffer  
()
#5  0x1538e0e9 in i965SubmitPacketsToken ()
#6  0x1535a160 in i965SwapFlush ()
#7  0x9024b74b in CGLFlushDrawable ()
#8  0x03373a4d in driMesaSwapBuffers ()
#9  0x00b8b132 in cvf_workert_swapbuffers_glx ()

Lines #9 and higher are in our application.  We have the option of  
linking our app with Mesa instead of Apple's OpenGL and that doesn't  
tend to exhibit the problem.  Given the current traceback, and  
tracebacks from previous Xquartz releases, we think it's probably a  
bug with X11's interface with the graphics driver.  Also, we're able  
to reproduce this problem on a variety of Macs running Leopard.

Can someone recommend how we might go about fixing the problem or  
lending a hand?

Thanks!

Mike

-
   Mike Krogh
   Computational Engineering Intl.
   2166 N. Salem St., Suite 101
   Apex, NC 27523
   919-363-0883, 919-363-0833 (fax)
   mfkrogh at ensight.com   http://www.ensight.com
   EnSight/EnLiten/EnVideo