https://bugs.freedesktop.org/show_bug.cgi?id=50450
--- Comment #8 from Maxim Koltsov maksbotan@gentoo.org 2012-05-29 06:51:37 PDT --- (In reply to comment #7)
Solution is to rename libstdc++.so.6 and libgcc_s.so.1 that are in /opt/quake4/ I guess, to something else which will make q4 use your system libs.
Thank you, it worked. But still i can't understand why doomsday runs so slow, I think it must run smoothly on my card. I also get weird screen artefacts in xonotic.