[lubuntu-users] Does the computer support "suspend"?
golisp at centrum.sk
Mon May 9 06:47:45 UTC 2016
Hibernating computer to disk will make snapshot of RAM to Harddrive, and power off computer.So, power cost is zero using hibernating. Resume after hibernation will get you computer in same state as was left, except clock will be actual.
Suspend to RAM will only cancel scheduller for processes, disable some periphetials and leave computer in hot state (usually with blinking status led). This will consume some power, and that is bad on batteries which are older than 10 years. Power PC machines had stopped sale at ~ 2001, 15 years ago. You can chek power consumption using wattmetter if suspend to ram will make sense.
If you want to use hibernation, then please check my older emails. I had described small how to enable it. Keyword for searching is "resume".
PS: Lubuntu had not forgott hibernation. Hibernation in Linux was disabled due to faulty binary device drivers from some vendors. Lubuntu is affected by that issues.
> Od: Fritz Hudnut <este.el.paz at gmail.com>
> Komu: Peter Golis <golisp at centrum.sk>
> Dátum: 09.05.2016 01:34
> Predmet: Re: [lubuntu-users] Does the computer support "suspend"?
> CC: <israeldahl at gmail.com, lubuntu-users at lists.ubuntu.com>
On Sun, May 8, 2016 at 3:43 AM, Peter Golis <golisp at centrum.sk <golisp at centrum.sk>> wrote:
As first, do you talk about Suspend to RAM or hibernation to disk?
Suspend to ram does not have big sense on laptop which have battery older than 10 years, but hibernation to disk will make sense. There is no entry in lxde-logout for hibernation, and I believe that button will exist in LXQT. Hibernation works on my PPC box without any issue, but using standard command line "systemctl hibernate". Kernel parameter for resume partition is required, of course.
Thanks for the post, to be honest, after I ran the first "sudo pm-is-supported --hibernate" and got no response, I didn't check it with the "echo" command . . . . This is a desktop, but possibly knowing the distinction, it would be "hibernate" that might be closer to OSX's "sleep" mode? Seems like in "suspend" the computer either gets "hot" or stays as hot as when it is running, so it doesn't seem to be using less power than when it is running . . . it's like "holding its breath" and there is some "tension" in the system--i.e., the computer isn't exactly "at rest" in suspend . . . .
Possibly with hibernate there might be more systemic "rest"? I think one of the "kind" posters on the Ubuntu Apple User forum rather gruffly suggested that 12.04 would "hibernate" even though it wouldn't "suspend" . . . which it did do in PPC . . . seems like that "talent" has been lost in Xenial?
Perhaps I'll try out the "echo" phrase for "hibernate" specifically when I get back to that partition, but, then, what is needed to "revive" out of "hibernate"??? Again, in OSX all I have to do to revive from sleep is click the mouse or hit a key and we are "awake." : - )
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