segmentation fault

[Mohsen Mahvash Mohammadi <mahvash@cim.mcgill.ca>]

Dear all

  Data is read from an I/O card and transferd  to linux area 
through a fifo to be displayed .I try to use Open GL for Displaying .

When RTL thread  is running , The Open GL  Program which runs in linux
is  stoped with a segmentation fault.when I do  not have  my  rtl thread , 
the Open GL program is fine .  I wonder how I can fix this problem to 
have rt threads and also open GL utility to  display the data.
Sometimes The netscape is also stopped with a same situation.
Mohsen Mahvash