If memory serves, you change your xorg.conf's "Device" section's
"Driver" entry to read:
"nv"
instead of
"nvidia",
although I would consult the xorg documentation/your distribution's
documentation (and back up your working xorg.conf) for specific
details. (Your boot sequence may also automatically load the nvidia
module, again, consult your distribution's documentation for details.)
Cheers/hope this helps,
dcw
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