hi, I have an old idl code running on vesion 5.6 (rt license). I installed this version on my new Dell 64 bits Ubunt 9.04 with ATI Radeon HD 4350 card. I got segmentaion fault every time I use mouse to manipulate the display window. There is one thread suggesting that moving the gl_driver.so  from the directory (not using it al all????).  I  do not know if this will solve my problem. Any sugeesttion is greatly appreciated. Please do not suggest that I upgrade to latest IDL version because it is not my code.