Thanks CrLf, looks like that fixed it for me also. Even though the answer may have been in the posts, a person needed to know what the problem is in order to find the answer. I searched for days, and even found a mention of "_GL_SYNC_TO_VBLANK=0" but not in relationship to a TNT2 video card. I even emailed firstname.lastname@example.org
. They asked for more information and said that they had some reports of problems with this card but never suggested the answer.