I've got an ASROCK K8NF6G-VSTA with an AMD Sempron 2600 (the version
without amd64 extensions) and haven't encountered any problem so far
with suspend or hibernate.

OTOH, I did take the precaution to upgrade to latest BIOS before
tracking the bug, that is BIOS 1.60

One has to enable these options in the BIOS :

Advanced>ACPI Configuration
Suspend to RAM : AUTO
Repost Video STR on Resume : Yes
ACPI HPET Table : Enabled

Everything works as it should. On resume from either suspend or
hibernate, the login asking a password for the user connected when
entering s/h is presented without having to touch mouse or keyboard.

The fact user can chose its kernel after hibernate is the desired
behavior. Provided you have different swap partitions, it allow you to
hibernate one and go to work with another release/distribution/OS. I
would be quite displeased if it wasn't the case, since there's no reason
to force the user to boot whatever system he wants. One refinement could
be to mask other kernels from the system that has been hibernated, but
it's not even the best - if you only need one kernel, you'd have
uninstalled the others, and if you need other kernels, you might have
reasons to do so, and that mean sometimes you'd want to reboot on
another kernel even if you used hibernate, even though you know you
would lose some data in the process.

The only problem I have with this main board is that Cool'n Quiet
doesn't work, which is quite a pain (I'd like to lower power
consumption). Has anyone gotten it to work?

-- 
[Feisty] suspend and hibernate fail on MB Asrock K8NF6G-VSTA
https://bugs.launchpad.net/bugs/81137
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