Technical Discussion
  >> Windows Issues


Register (or login) on our website and you will not see this ad.


Pages in this thread: 1 | 2 | 3 | >> (show all)   Print Thread
Standard User TLM
(legend) Wed 25-Sep-13 10:20:22
Print Post

Lappy gone into hibernate while plugged in?


[link to this post]
 
Might be more of a H/W question really, but it's a Windows 7 machine, and Windows does the power management, so...

Came down this morning, and had that "eek!" moment, when the computer does not respond at all. Normally, I leave it on 24 hours, and the screen powers down after a few minutes, but the CPU carries on as normal, and it only takes a touch of the trackpad to restore the screen.

This morning, it's all dark and quiet, and unresponsive to the touch.

OK, nothing else for it - power button. It says: "Resuming Windows", so obviously had gone to hibernate - didn't seem like a full boot-up, and no evidence of any crash.

I did use it on battery, up to the final hibernate warning, last night, but put it back on mains before it had actually hibernated, and went to bed.

Obviously, my first thought this morning was: "I can't have plugged it in properly!", but it definitely is plugged in, and not only that, the battery is fully charged.

The only other thing I can think of is that there's been a power cut of which I was not aware, some time during the night, that caused it to hibernate - but it's restored to full charge this morning.

This is the first time I've ever had this. Is it a bad omen something's going wrong with the machine (which is still under warranty), or do you reckon there's just been a power cut?

T.
Standard User AEP
(eat-sleep-adslguide) Wed 25-Sep-13 10:28:44
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
I'd tend to go for the power-cut theory unless it happens again. Or possibly, if you had reached the final warning, it did hibernate because the battery was below the threshold and hadn't recharged enough by the time it timed out. I certainly wouldn't be concerned unless it starts doing it consistently. It doesn't sound like a hardware fault.
Standard User TLM
(legend) Wed 25-Sep-13 10:40:11
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: AEP] [link to this post]
 
I thought the same as you, initially - i.e. had gone past the point of no return, by the time it was plugged in, and proceeded to hibernate anyway. But that makes no sense, because why would it ever hibernate, once it has detected mains power? From that point, it doesn't care how low the battery has got - it's not using it; it's on mains. So I pretty much discounted that theory.

I don't think I've got anything around the house, any more, that would tell me if there's been a power cut. Certain gadgets used to have mains-powered clocks, that would get out of sync if the power had been out. But now, I don't think I've got any that aren't either self-setting, or have emergency battery back-up, so there's nothing I can look at to confirm: "Yes, that was it!" The computer's the only clue that anything might have happened.

T.


Register (or login) on our website and you will not see this ad.

Standard User AEP
(eat-sleep-adslguide) Wed 25-Sep-13 10:42:08
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
I wonder if the system log would tell you when it hibernated? That might give a clue as to the cause.
Standard User XRaySpeX
(eat-sleep-adslguide) Wed 25-Sep-13 11:58:43
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
In reply to a post by TLM:
Certain gadgets used to have mains-powered clocks, that would get out of sync if the power had been out.
Boiler controller or microwave?

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC
Standard User TLM
(legend) Wed 25-Sep-13 12:07:18
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: AEP] [link to this post]
 
It appears the system entered "sleep state" about ten-to-six this morning, but the reason cited is: "system idle", not: "power conservation", or similar. The system should not have been idle, because I am permanently running SETI (geeky, I know), so it's always trundling away at something, in the background.

If there has been some kind of failure at SETI, it sometimes runs out of work, but I've checked the SETI logs, and there are tasks still in progress, as well as sufficient for several more days, so there's no way it could have run out and been idle, during the night.

There are a number of power-related warnings spanning a period of about 12 minutes from when I first restored it from hibernate this morning, but very odd ones. They report that the speed of the processors (four of them) is being restricted "by firmware". This may be perfectly legitimate, to prevent overheating (it's doing some pretty heavy crunching at the moment). I can't find anything else about this particular warning - Microsoft's online event lookup doesn't find anything. A scan back through recent logs doesn't show it as having happened again in the recent past - haven't been back through all of them, to check if it ever did.

T.
Standard User TLM
(legend) Wed 25-Sep-13 12:12:08
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: XRaySpeX] [link to this post]
 
No, the boiler controller has battery backup, so doesn't reflect power outages unless they were very long - more than a few hours. And the microwave clock doesn't work. That is, it can still time the cooking alright - just the display packed up. Wasn't worth replacing the microwave just for that. I didn't really use it anyway (except to check for power outages! blush)

T.
Standard User TimJ
(committed) Wed 25-Sep-13 12:58:50
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
The router logs might give a clue about power cut

Are you signed up to Broadband Quality Monitor?

That would show if you had had a power cut.
Standard User TLM
(legend) Wed 25-Sep-13 13:31:07
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TimJ] [link to this post]
 
I don't think, from the Windows event logs, there has been a powercut. It seems to suggest it hibernated because it was bored, rather than because it was out of juice - which doesn't really make any sense, as it had lots of processing tasks to be getting on with.

I'm not signed up to Quality Monitor. The router event log appears only to show events that have happened in the last few minutes, which unfortunately did include a brief (unrelated) outage, so I can't even tell from connection uptime whether it went down during the night at all. It shows it as having been "up" for just six minutes - which is true, but no help at all re anything that happened in the night.

The logs all seem to be immediate past only. I can't find anywhere it lets you look back even as far as yesterday.
Standard User Chrysalis
(legend) Wed 25-Sep-13 14:42:44
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
I am pretty sure win7 on a laptop will default power save even when plugged in as I remember turning it off.

BT Infinity 2 Since Dec 2012 - BQM
Standard User TLM
(legend) Wed 25-Sep-13 15:43:41
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: Chrysalis] [link to this post]
 
Well, I've owned it over a year, and it never has 'til now. I haven't fiddled with anything (that I know of), so why would it suddenly change its behaviour? This is what makes me worry whether something is on the blink. If it had always done it, no problem - but sudden changes, for no known reason? confused
Standard User AEP
(eat-sleep-adslguide) Wed 25-Sep-13 15:56:17
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
From what you have said so far it sounds as if, for some reason, the SETI program stopped (or at least stopped using CPU cycles). Then, after a time, the laptop went into hibernation - which is its default configuration.

Why the SETI program stopped is another matter.
Standard User TLM
(legend) Wed 25-Sep-13 16:11:11
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: AEP] [link to this post]
 
Four SETI processes were (and are) running - one per processor. So all four would have to have come to grief for the OS to rate the machine as "idle" (not to mention all the other little automatic housekeeping and maintenance tasks - not SETI related - that seem to go on at any hour of the day or night).

For all four processors to have encountered an event that rendered them "idle" is something of a concern in itself (there were no failed or suspended SETI tasks in the log of that).

I think the warnings about the restricted processor speeds were a red herring, as doing a more detailed trawl of the logs suggest they occur most days, if not all, and are probably a default part of routine operation, to prevent overheating. Sometimes they have happened several days in a row, at exactly the same time to the second, which implies they coincide with some particular scheduled process being run.

They've never previously been associated with the machine going into hibernation, or with any symptom at all. I would not have known about them, had I not been searching for clues to the unexplained hibernation.

T.
Standard User AEP
(eat-sleep-adslguide) Wed 25-Sep-13 16:28:27
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
And yet - according to the log - the CPUs were idle. I think this is a software problem - not hardware or the OS.
Standard User cheshire_man
(knowledge is power) Wed 25-Sep-13 16:59:11
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
Maybe the SETI processes did find some evidence - then tried to hide it...

Tony
We have more and more laws, and less and less enforcement
Standard User AEP
(eat-sleep-adslguide) Wed 25-Sep-13 17:07:48
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
I notice that on the [email protected] status page all the ap_splitter programs are listed as "not running". Could this have affected things? (The notes say "At least one needs to be running to produce work, and that's usually enough.")
Standard User ian72
(knowledge is power) Thu 26-Sep-13 09:54:32
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
If you go into the power settings and select the advanced option then there is a setting buried in there specifically for hibernate under the "sleep" twisty.

My understanding is that windows only considers the machine to be busy if there is human interaction - even if you set windows to do a massive file transfer it will still sleep/hibernate if you don't press any buttons/wiggle the mouse - and this is partly because windows always has something to do so what is considered "idle"?
Standard User TLM
(legend) Thu 26-Sep-13 11:50:00
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: ian72] [link to this post]
 
But none of this makes sense in the context of what actually happened. It had never done it before, and hasn't done it again all of yesterday, or last night, despite nothing having been tweaked. If I have ever touched those settings at all, it would only have been in the first few days of owning the machine - over a year ago. So it's not "normal behaviour" - or certainly not "normal" for the way I've always had it set up, right from the word go. I've never wanted it to hibernate, precisely because it usually has some distributed computing project on-the-go. What better time to donate processing power than when I'm not at the machine? So I don't want it all to come to a halt, every time I'm not there.

It has been normal behaviour for the screen to be powered down after a few minutes unattended. That's as I want it, because I don't want the screen blazing away into the night, with nobody there to see it. But I've never needed to hit the power button when I return, so something was different this time. So much so, that I initially thought the computer had failed, and was relieved when it did restart - with no obvious signs of damage or corruption.

T.
Standard User ian72
(knowledge is power) Thu 26-Sep-13 13:49:00
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: TLM] [link to this post]
 
Not disagreeing with anything you have said. However, if you check that setting is not set then it rules it out and may just have to be put down as a glitch (especially if the machine has been running 24x7 for a while as Windows does tend to like the occasional reboot).
Standard User GeoffB
(fountain of knowledge) Sat 28-Sep-13 07:25:13
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: ian72] [link to this post]
 
My Dell Studio occasionally hibernates for no good reason. Most of the time I put it into Standby if I'm going to be out for a few hours and a tap of the touchpad wakes it up. But sometimes I can be away for an hour and when I come back it's hibernated. A tap on the power button wakes it and no problem, but it is a mystery. Can hibernation be disabled in Win7?

Dell Studio1558 with Win7 Home Premium
8GB RAM
IE10 and Live Mail
BT Infinity via HH3
Standard User TLM
(legend) Thu 03-Oct-13 22:26:30
Print Post

Re: Lappy gone into hibernate while plugged in?


[re: GeoffB] [link to this post]
 
In my power settings, in Win 7, I have got "put the computer to sleep" and "hibernate" both set to "never", on mains. Not sure what the precise difference is, or why it still managed to do it anyway, on this isolated occasion. No repetition so far, so hopefully not an early sign something's going wrong, as I first feared. Maybe it was a power outage after all. I've got the sleep function enabled after just 15 minutes, if it's on battery, so the mains wouldn't have to be out very long before it triggered.

We've got some rather major works going on on the nearby railway, at the moment, so I don't know if it's possible they might have done something during the night that could have affected the power. It's not an electrified section, but I don't know if they might have hit something, dug up something, or whatever.

We've had a formal letter through the door about it, with a number to ring in case of problems, but I assumed they were thinking mainly of noise, not disruption to utilities.

T.
Pages in this thread: 1 | 2 | 3 | >> (show all)   Print Thread

Jump to