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

[j.natowitz at rcn.com (Jerry Natowitz)]

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
>> -=-=-=-=-
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>
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