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Re: Laptop randomly reboots

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On 08/28/2017 03:32 PM, Sam Smith wrote:
> On 06/13/2017 02:27 PM, Sam Smith wrote:
>> On 05/12/2017 03:38 PM, Sam Smith wrote:
>>> On 01/20/2017 08:04 PM, Sam Smith wrote:
>>>> I'll try to keep this short. I bought a used Lenovo T520 back in 
>>>> May. It
>>>> had the motherboard with nvidia GPU. Because it sucks power and doesn't
>>>> really have good suspend/resume support, I bought a used mother board
>>>> off of ebay that only had intel integrated graphics and I swapped it
>>>> out. All was well and I had installed in it 8gb +4gb of ram.
>>>>
>>>> It ran like that for about 8 weeks before I bought an 8gb stick and
>>>> stuck that in, so then I had 8gb + 8gb of ram. After about 6 weeks of
>>>> running like, it randomly rebooted overnight. I shrugged it off and
>>>> thought maybe the power went out or something (even though it had a
>>>> battery in it). But then about 2 weeks later it did it again..and then
>>>> two weeks after that. So I pulled out the new 8gb stick I had put in 
>>>> and
>>>> let it run with just one 8gb stick. It ran like that for about 10 weeks
>>>> without a problem. I put the old 4gb stick in just for fun, bringing it
>>>> back to the original 8gb + 4gb configuration. But about 2 weeks 
>>>> later it
>>>> rebooted again. At that point I bought a matched 16gb kit (8gb + 8gb)
>>>> from new egg that seemed to come recommended from google searching for
>>>> compatible ram for this model. But just a couple of days ago (about 3
>>>> weeks after installing it), it rebooted by itself.
>>>>
>>>> I am kind of at a loss here now. I can buy another motherboard and swap
>>>> it out again, but that takes a few hours and I don't feel like doing 
>>>> it.
>>>> The cooling and thermal stuff is all good on the laptop,I've ran 
>>>> prime95
>>>> and video encoding for hours and it is fine (temps stay below 80* at
>>>> least, normal usage is 40-55*). I've also ran memtest for a few hours.
>>>>
>>>> What I find weird is that the machine suddenly reboots. At least a few
>>>> years ago, ram issues would just lead to a kernel panic screen. But 
>>>> with
>>>> this, the machine is just like someone pulled the plug and rebooted it.
>>>> I started to wonder if there is some built in watchdog somewhere that
>>>> will reboot the machine if it hangs, but I can't tell? Other than that,
>>>> if this is the kernel that is rebooting the machine, is there any way I
>>>> can get it to dump some info somewhere before it fully reboots? 
>>>> Before I
>>>> go through the pain of swapping the board again, I'd just like to 
>>>> really
>>>> know that this is a hardware issue and not the kernel detecting
>>>> something and just choosing to reboot...
>>>>
>>>> Thanks for any info,
>>>>
>>>> Sam
>>>>
>>>
>>> Just an update. My uptime is now 80 days and I haven't had any random
>>> reboots. The only thing I did was pull in the latest apt-get updates
>>> (which took me from Jessie 6.6 to 6.7 I think, but also installed a
>>> newer xorg-intel driver from backports). I also read somewhere that
>>> there were some "issues" with having the hardware virtualization
>>> extensions enabled in BIOS (can't remember what the issues were) so I
>>> disabled those after running the apt-get upgrade and rebooting.
>>>
>>> Never gone this long without a reboot so I guess perhaps I'm good. But
>>> if this was indeed a software caused reboot, I'd like to know what
>>> setting I need to change so that debian would just hang at a kernel
>>> panic screen (or something similar) instead of just an instant dump and
>>> reboot leaving me thinking that it is hardware issues (which it may
>>> still be....)
>>>
>>>
>>> Regards,
>>> Samuel Smith
>>>
>>
>>
>> Guess I spoke too soon. About 10 days after I posted the above, the 
>> laptop randomly rebooted. :sigh:
>>
>>
> 
> 
> And for my hopefully final update..... I upgraded from jessie to stretch 
> and about 2 weeks after that I got a random reboot. Figured that ruled 
> out any software issue. Went ahead and bought a new board off of ebay 
> and judging by the lack of a serial number in the bios screen, I'd say 
> it was from an old stock pile destined for RMA warranty repairs. 
> Nonetheless, after a month of swapping the board, I've not had any 
> further problems.
> 
> 


Well I guess I really spoke too soon.... Just got a random reboot a 
minute ago... Pretty much at a loss now. The only thing that hasn't been 
replaced now is the CPU, battery, and power adapter. I do have a spare 
battery and power adapter. Guess I'll try running with those for a month 
or so and see what happens. Though not really sure how either one of 
those would make the computer reboot randomly once a month. Laptop is 
mounted in a docking station. At least for the last 6 months, every 
reboot was while it was docked. But I do remember times last year 
sitting at the kitchen table undocked and getting a reboot so I don't 
think the docking station is the issue.. But have no idea now :/

Regards,

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Re: Laptop randomly reboots Sam Smith <debian@net153.net> - 2017-05-12 22:40 +0200
  Re: Laptop randomly reboots Sam Smith <debian@net153.net> - 2017-06-13 21:30 +0200
    Re: Laptop randomly reboots Sam Smith <debian@net153.net> - 2017-08-28 22:50 +0200
      Re: Laptop randomly reboots Sam Smith <debian@net153.net> - 2017-09-05 06:50 +0200
        Re: Laptop randomly reboots rhkramer@gmail.com - 2017-09-05 13:30 +0200
          Re: Laptop randomly reboots Fungi4All <fungilife@protonmail.com> - 2017-09-05 21:50 +0200
          Re: Laptop randomly reboots Sam Smith <debian@net153.net> - 2017-09-05 21:50 +0200

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