[ubuntu-uk] Computer restarts on shutdown

[James Morrissey]

Thanks all for getting back to me.

> Checking logs would be a good answer. You can use Log File Viewer and try
> and things like Error or Warning in syslog (or, 'rror' or 'arning' - comes
> in useful more often than you might think) but if it's an abrupt failure
> being caused by something in BIOS or hardware it is less likely to log. If
> there were any example logs in the forums you're looking in you could search
> for those as well.

Looking at syslog i get the following errors and warnings:

Errors:

watchdog: error registering /dev/watchdog (err=-16).
- This appears to be related to me, for some reason, having two
watchdogs which operate on waking from suspend. Its easy to blacklist
one of them. To me this seems like the most relevant error to my
reboot/restart problem.

EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro
- This is some kind of read-write error, the webpages about which i
don't understand.

<error> [1349387438.2745] [nm-device-wifi.c:2591]
real_update_permanent_hw_address(): (eth1): unable to read permanent
MAC address (error 0)
- Has, it seems, has to do with my broadcom wirless chip, but i don't
really know much more than that.

Warnings:

dnsmasq[26261]: warning: no upstream servers configured
- I am not sure what this is, it might have to do with my VPN

As i said, it looks like the watchdog error might be the one, but i
don't know enough about this stuff to have a sense. If anyone has any
advice i'd appreciate it.

j

On 4 October 2012 21:44, Simon Greenwood <sfgreenwood at gmail.com> wrote:
>
>
> On 4 October 2012 21:11, James Morrissey <morrissey.james1 at gmail.com> wrote:
>>
>> Hi all,
>>
>> I have been having a problem with a new machine.
>>
>> Occasionally when i go to shut it down, it restarts instead. If i try
>> and shut it down again, once it has rebooted to the login in screen,
>> it shuts down completely.
>>
>> Sometimes it plays up and sometimes it doesn't i haven't be able to
>> work out what causes it.
>>
>> I have read elsewhere that this might be a power setting in the BIOS,
>> but i think not as i) it doesn't happen in windows (which i dual boot)
>> and ii) it only happens some of the time and never if i shutdown
>> straight from the login screen.
>>
>> Its not a world-ending problem, but its a bit of a hassle if i am in a
>> rush to go somewhere and want to shut my machine down and it decides
>> to restart.
>>
>> All of this takes place when shutting down via the cog in the top
>> right of the panel.
>>
>> I've had this question kicking around the forums for a couple of weeks
>> , but nothing has really come up. Someone suggested looking at the
>> logs, but i am not sure where i'd be looking or what i'd be looking
>> for.
>>
>> I was wondering if anyone on here might have any ideas.
>>
>
> Checking logs would be a good answer. You can use Log File Viewer and try
> and things like Error or Warning in syslog (or, 'rror' or 'arning' - comes
> in useful more often than you might think) but if it's an abrupt failure
> being caused by something in BIOS or hardware it is less likely to log. If
> there were any example logs in the forums you're looking in you could search
> for those as well.
>
> It does sound like a BIOS issue more than anything as it's going to be in
> something like the suspend or hibernate process and that it's not recovering
> properly.
>
> s/
> --
> Twitter: @sfgreenwood
> "TBA are particularly glib
>
>
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> ubuntu-uk at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk
> https://wiki.ubuntu.com/UKTeam/
>



-- 
James Morrissey
Research Officer
Refugee Studies Centre | Department of International Development |
University of Oxford
Junior Research Fellow in Refugee Studies | Lady Margaret Hall |
University of Oxford
3 Mansfield Road | Oxford, United Kingdom | OX1 3TB