[lkml]   [2007]   [Jun]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [patch 0/3] AHCI Link Power Management
Kristen Carlson Accardi wrote:
>>>>> I'm not sure about this. We need better PM framework to support
>>>>> powersaving in other controllers and some ahcis don't save much
>>>>> when only link power management is used,
>>>> do you have data to support this?
>>> Yeah, it was some Lenovo notebook. Pavel is more familiar with the
>>> hardware. Pavel, what was the notebook which didn't save much power
>>> with standard SATA power save but needed port to be completely turned off?
>> Thinkpad x60. Some one Kristen probably used while developing the
>> patch :-).
> Yes - that confirms my conclusion that the first patch just wasn't
> done correctly - cause when I measure the power savings with a power
> meter on the X60 with my patches I see ~ 1W.

Hmmm... Could it be that the controller doesn't enter powersave state
when SControl is written to?

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-06-14 09:59    [W:0.131 / U:0.924 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site