Comment 18 for bug 446442

I'm having the same issue with the same motherboard and two graphics cards.
Neither suspend-to-disk or suspend-to-RAM work - just result in power supply fans staying on and a black screen with non-blinking cursor in the corner, as if the system had hung [it probably had].
If I hard-off or reset the system after it has completed the write cycle for suspend-to-disk, it still fails to resume normally.

I have tried updating the BIOS but this had no effect.

Also got same message in Dmesg:
"ACPI: I/O resource nForce2_smbus [0x1c00-0x1c3f] conflicts with ACPI region SM00 [0x1c00-0x1c05]"

Installed GRUB 2 and used "acpi_enforce_resources=lax" thinking that it would solve the problem, but it did not.

I think this is a problem with the SMbus and ACPI. The system seems to take all necessary steps to suspend but fails to switch off or power down the PSU.
When I tell it to hibernate the HDD indicator LED will light up as it writes the RAM to disk, but it fails to switch off the power afterwards.

Has anyone tried this in Lucid?? I would but I haven't the time.
It worked without a hitch in Jaunty.