Re: Re: [PATCHES] add _CST support

Dominik Brodowski
2004-12-23T00:10:24Z

> I found I had to disable the bm_check to get out of C1
> on my D600. This doesn't sound right, as bm_check
> should only have an effect on entering C3.

Huh, yes, this sounds like a bug. Can't reproduce it here, though :-(

> cat /proc/acpi/processor/CPU0/power
> active state: 3
> max_cstate: C42
> bus master activity: 00000000
> states:
> 1: type[C1] promotion[2] demotion[-] latency[001]
> usage[00000010]
> 2: type[C2] promotion[3] demotion[1] latency[001]
> usage[00003280]
> *3: type[C3] promotion[4] demotion[2] latency[085]
> usage[00000819]
> 4: type[C3] promotion[-] demotion[2] latency[185]
> usage[00000000]
>
> It appears the demotion from C4 is to C2, when one would expect C3.

Actually, this was on purpose: I think we want to leave C3-type sleep
quickly to advance bus master activity...

Dominik