Fixing hibernation (suspend to disk) in Ubuntu 8.04 Hardy Heron for a Dell d800 using nvidia proprietary drivers.

Following a tip I found on on blog.paulbetts.org, I was able to get my Dell D800 with nVidia Quadro FX Go1000 to hibernate and resume correctly.

The tip is reproduced below:
In the Device section:
Section "Device"
...
Driver "nvidia"
...

Option "NvAGP" "1"
...
EndSection

Then I included in /etc/modprobe.d/blacklist the following line:
blacklist intel_agp.
HIBERNATE_MODE=platform
After a reboot, hibernation now works like it should.

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