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Odd Laptop behaviour...Fixed.

Moderator
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Registered: ‎14-04-2007

Odd Laptop behaviour...Fixed.

I have a laptop with Ubuntu installed, lid close and shut down with a 92% charge in the battery.
I open the lid....ok it's still off.
I don't press anything but plug in it's power supply.....ok the laptop is still off.
I switch on the power supply at the mains socket and the laptop starts up Huh
Last time the laptop was used it was shut down normally, no hibernation or stuff like that.
Is there some setting I've missed.

Customer and Forum Moderator. Windows 10 Firefox 64.0 (64-bit)

13 REPLIES
Community Veteran
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Registered: ‎16-02-2009

Re: Odd Laptop behaviour

Never seen that issue before. The only options normally are to do with the lid, what to do when you close it etc.
It shouldn't startup when plugged in only. Might be hardware related.
Moderator
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Re: Odd Laptop behaviour

I might add that this behaviour started when I installed Ubuntu a few weeks ago but that, of course could be a coincidence.

Customer and Forum Moderator. Windows 10 Firefox 64.0 (64-bit)

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Re: Odd Laptop behaviour

Ahh, well as you know I am NOT an Ubuntu user so can't comment on that.  Wink
minkey
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Registered: ‎22-07-2007

Re: Odd Laptop behaviour

I would check your BIOS settings, as on my Dell Desktop there is a power management setting which will turn on my PC if has power (like turning it on at the wall) I think it was called something like 'wake on power'. I'm not at my PC so can't check the exact name.
Moderator
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Re: Odd Laptop behaviour

I went into the laptop's limited BIOS and could see no problems.
I changed the boot order as the HD was down at number 6 below the USB ports. I reset it to number 2 below the CD drive.
Apart from that I changed nothing else, just doing a save and close.
It has fixed the problem Undecided
I then came back downstairs to my PC and read minkey's new post....great minds etc...

Customer and Forum Moderator. Windows 10 Firefox 64.0 (64-bit)

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Registered: ‎01-08-2007

Re: Odd Laptop behaviour - Fixed.

I have a similar problem with my netbook - I shut it down and if the cat5 cable is plugged in, something on the network wakes the damn thing back up again. WOL is disabled in the bios but it still wakes up when it hears even the slightest bit of traffic on the network - totally opposite of how WOL is supposed to work too!
Can't use wifi at the moment so I'm stuck with having to remember to pull the plug..
I need a new signature... i'm bored of the old one!
nanotm
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Re: Odd Laptop behaviour - Fixed.

check in the adaptor settings to make sure magic pattern is disabled, and possibly in the bios as well (depending on age of laptop)
I found having boot from LAN disabled was required as well to stop mine (old Toshiba laptop) from randomly booting whenever the router sent an ack request to its ip address .....
just because your paranoid doesn't mean they aren't out to get you
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Re: Odd Laptop behaviour - Fixed.

The laptop I am having the issue with (yes...it's not fixed as I thought) is not on a wired network but is wireless.
BIOS still checks out ok and WOL is disabled.

Customer and Forum Moderator. Windows 10 Firefox 64.0 (64-bit)

minkey
Grafter
Posts: 386
Registered: ‎22-07-2007

Re: Odd Laptop behaviour - Fixed.

There are some posts on other sites which indicate your CMOS battery may need replacing.
Not sure why that would mean your laptop would turn on though?
https://neosmart.net/forums/showthread.php?t=8279
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Re: Odd Laptop behaviour - Fixed.

Excellent suggestion minkey and I'll check that out when I have a chance because it sounds very plausible. Smiley

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Re: Odd Laptop behaviour - Fixed.

Quote from: nanotm
I found having boot from LAN disabled was required as well to stop mine (old Toshiba laptop) from randomly booting whenever the router sent an ack request to its ip address .....

Yes my netbook is a toshiba too and you saying that just confirms my suspicions - it's a toshiba thing. Like I said, I have to pull the plug everytime I shutdown or hibernate.
I need a new signature... i'm bored of the old one!
nanotm
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Re: Odd Laptop behaviour - Fixed.

Quote from: minkey
There are some posts on other sites which indicate your CMOS battery may need replacing.
Not sure why that would mean your laptop would turn on though?
https://neosmart.net/forums/showthread.php?t=8279

if the cmos battery is low some of the old ami bios's original code was to boot the machine with a warning message that your battery was knackered (we had loads of pc's that did this at work) but not perform a full boot, a bios update removed the message so the machine would just do a full boot, mainly a problem with the older rechargeable cmos batteries (haven't seen one like tat in almost a decade) once the cmos battery was fully charged it shouldn't happen so its possible /probable an old subroutine is triggering an instant reboot when a new cmos battery is required .....
@7up,
the windows adaptor setting could be overriding the bios setting which is why I mention that as a possibility, some of the older bios systems were poorly coded and the windows setting didn't always change the operating flag shown on screen when checking the bios, AM bios were particularly bad at that in configurations used by Toshiba because they always left the back door open (just type AMI on any old machine that has a boot lock enabled when you don't know the password) although they are far from the only company that did that (something we used extensively to bypass so called secure boot back in the day) 
just because your paranoid doesn't mean they aren't out to get you
Moderator
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Re: Odd Laptop behaviour - Fixed.

Quote from: minkey
There are some posts on other sites which indicate your CMOS battery may need replacing.

This indeed was the problem.
A quick Google showed me where the CMOS battery was and how to access it.
Replaced it with a new one and it's fine now with no odd behavioural problems, so thank you minkey Smiley

Customer and Forum Moderator. Windows 10 Firefox 64.0 (64-bit)