[Discuss] How can I resume from S1 (STR) mode in Ubuntu?

[kkeville at MIT.EDU (Kurt L Keville)]

This is a real problem, a real exercise. I am actually doing this. Exercise as
in FTX.

Quoting Jerry Natowitz <j.natowitz at rcn.com>:

> Oh, and here I thought you were asking for help with a real problem.
> I can't speak for others, but I wish you had made it clear that this 
> was "my exercise here".
>
> 	Jerry Natowitz
> ===>    j.natowitz (at) gmail.com
>
> On 05/18/12 13:40, Kurt L Keville wrote:
>> Indeed. Throttling down the server power usage is exactly the purpose of my
>> exercise here. I want to show mostly the availability of this solution
>> rather
>> than any determination of the utility of same. According to
>> http://ebscosustainability.files.wordpress.com/2010/06/data-center-energy-efficiency.pdf
>>
>> even an efficient server still uses about half its full power when doing
>> virtually no work so it would be great if we had an easy to use, CPU-load
>> checking, aggressive power management system.
>>
>> I have tested using cpufreq-set to slow my boxes down to a crawl with very
>> little effect on power usage so I think using suspend or hibernate are a
>> couple
>> of the few options I have left. I'll try some of your suggestions;
>> hooking up a
>> digiboard and multiplexing out serial access, or using jabr's idea, but I
>> wonder if suspend will turn off access to everything but usb and / or ps2,
>> which is where it is expecting to get a mouse wiggle from...
>>
>> Thanks for the help... I'll keep you posted... I also bought some
>> IP-addressable
>> plugstrips and will test upsd and nut with it. Shutdowns may be a little
>> too
>> aggressive though; I don't think I have that much time between jobs!
>>
>>> On Thu, May 17, 2012 at 09:57:53AM -0400, Kurt Keville wrote:
>>>> Thanks... I'll give that a test... my big problem is (or will be)
>>>> lack of physical access to the servers and I figure this has to have
>>>> been bumped into out there in Datacenterland by someone... Federico
>>>> pointed me at powernap which appears to have some hook options that
>>>> might fit the criteria...
>>>
>>> Another potential solution to this, depending on the details of your
>>> arrangement, is to set up console access on the serial port, and then
>>> use a terminal server or similar device to access the console over the
>>> serial port. Especially if you're going to have a rack full of
>>> servers set up this way, it can come in quite handy.
>>>
>>> http://www.howtoforge.com/setting_up_a_serial_console
>>>
>>> IIRC server-class hardware (maybe all hardware these days?) can also
>>> be configured to provide bios access on a serial port, e.g.:
>>>
>>>
>>> http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00440332/c00440332.pdf
>>>
>>>
>>> I agree with Jerry that your server machines should have ACPI power
>>> settings disabled so they just never sleep. Much modern hardware does
>>> have a wake-on-lan feature, though IIRC you need to send it a
>>> particular type of network message for that to work (and it needs to
>>> be enabled). But there's really no reason for a machine intended to
>>> act as a server to ever go to sleep, unless you are the only one who
>>> will ever access it, and you're prepared to wake it up every time you
>>> want to do so.
>>>
>>> --
>>> Derek D. Martin http://www.pizzashack.org/ GPG Key ID: 0xDFBEAD02
>>> -=-=-=-=-
>>> This message is posted from an invalid address. Replying to it will
>>> result in
>>> undeliverable mail due to spam prevention. Sorry for the inconvenience.
>>>
>>>
>>
>>
>