Hello,
I read earlier today Mark Bradbury asked about the unknown symbol __VMALLOC_RESERVE problem. I had the same problem. I searched the nvidia linux driver forum and came up with the solution in the link below:
http://www.nvnews.net/vbulletin/showthread.php?t=37112
The patch itself failed to apply on this 584smp source. But since it is only line to add, it is easy to go directly to the file and add it there. After the recompilation the problem was fixed.
And I also found this thread regarding the lockup problem of 6111 driver. My machine had this problem and I applied the nvidia patch in the thread. But I can not tell if it really helps because my machine is just up for several minutes. I hope it will be useful people here.
http://www.nvnews.net/vbulletin/showthread.php?t=35691
Cheers, Guo