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Re: Laptop randomly reboots

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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.

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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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