Windows 7: Sleep mode no longer works after upgrading to Win7 from XP

Maybe I can "reuse" this post for my doubt

I just installed Windows 7 Ultimate 64 bits, and I cant make the hibernate mode work fine. This works for Ubuntu 12.04 64 bits (installed in the same computer) and used to work for Windows 7 32 bits that was installed before

When I say "working fine" I say that is not correctly going to S4 mode. Monitor goes off, but I can clearly hear hard disc working. When I used to do this in Windows 7 32bits, the computer completely went off, saved state in memory, seemed to be totally off. No sounds at all :-)

Whats worse, the system wont go this state if I have, lets say, opened not saved file (pending to be saved or discarded)



I would like to get this capability back

Just if it helps, this is my powercfg -a output:

The following sleep states are available on this system: Standby ( S1 S3 ) Hiber
nate Hybrid Sleep
The following sleep states are not available on this system:
Standby (S2)
The system firmware does not support this standby state.

I also, turned off Hybrid sleep mode