Hi Mike, we have a temporary freezing problem when displaying 1024x1024 video sequences at high speed (>30fps) with Xfree86 4.2.1-r2 on gentoo Linux with Radeon VE and Matrox G450 graphics cards. A similar system with an nvidea card seems to be fine up to 50fps.
We also see huge numbers of SIGALARM / sigreturn sequences in the strace, but the server freezes only for 10 seconds and then continues for a minute when the problem reoccurs. Do you have any news/fixes on your bug yet? Regards, Arne Ludwig