[ltp] C4 state on x60s - any news?

[Damien Challet]

On Thursday 17 May 2007 10:10:18 Michael Gaber wrote:
> i heard the following, please correct me if i'm totally wrong:
> windoom has some problems with states >C3 so the bios hides these from
> the OS.
> also in states >C3 the cache will eventually lose data or become
> inconsistent, so we don't go there normally. if you see C4 in your
> /proc/bla/whatever after a suspend/resume cycle the bios was not quick
> enough to hide this state

on a T41, the C4 state appears when one uses the battery and disappears when 
running on AC.

the power save is about 0.5W I think.