I try to get back at him to get some news / logs / another try with single-head (one monitor). But as far as I can tell, and as I wrote, he uses the accelerated drivers, so it’s not the “wrong kind of” driver; and it works well on other games, and began after the patch this post was posted after. Still, I will try to get more info, or get the original author into this forum somehow
If it is indeed something, no one else encounters under linux, especially if someone with the same type of card can test it, it might be on his side.
It could be also some OpenGL settings wrong, as there were already problems with specific cards which worked with overriding the OpenGL settings manually.