> Are you by any chance using the NVIDIA supplied drivers? I had > exactly the same symptoms with X freezing, especially when doing > something that puts a bit of load on the system. The recent upgrade > to the drivers actually made things worse. In the short term, the > only way to get the console screen back was to reboot. > > However, in the long term, it seems the problem was a bad interaction > with the FreeBSD AGP GART -- ie. the agp.ko kernel module. I > recompiled the driver to use it's own built in AGP GART and since then > everything has been rock solid stable --- the x11/nvidia port makes it > easy to switch, but remember to edit /boot/loader.conf or your kernel > config to take out (or add) the agp module. NVIDIA docs are a bit > equivocal about recommending one way or the other -- which way to > choose depends on the precise hardware you have. Only way to tell is > by experiment. There's also a sysctl hw.nvidia.agp.status.rate that > lets you control the agp card rate: it should all work automatically, > but you may find that dropping the rate will help stabilize things. > Of course, that will have a deleterious impact on graphics > performance. I don't have NVIDIA drivers. Is there any known bug in the ATI Radeon driver? I rebooted, and all I have is the saved output from fstat, no core dump. Is this enough to find out what was wrong? Can I reproduce it under controlled circumstances?
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