After installing the nvidia driver 100.14.19, when X starts up the LCD monitor goes into standby mode and the machine is dead (ctrl-alt-del works sometimes). I've tried using the nvidia installer, the Restricted Driver Manager, and envy, all with the same results. Running under vesa at 640x480 works.
I've looked at http://www.nvnews.net/vbulletin/showthread.php?t=99456
, but I don't have the same issue with older drivers being loaded or the "PCI: Failed to allocate mem resource" problem.
OS: Ubuntu Gutsy amd64, kernel 2.6.22-14-generic
Video: ASUS EN8500GT
Mobo: ASUS M2N-E SLI (nForce 500 chipset)
CPU: AMD 64 5200+