System Shutting Down Unexpectedly (Ubuntu 10.04)

[NoOp]

On 08/07/2010 05:43 AM, Tom Browder wrote:
> On Thu, Aug 5, 2010 at 13:46, Tom Browder <tom.browder at gmail.com> wrote:
>> Update:
>>
>> Yesterday I flashed my BIOS with the latest version. and upgraded to
>> the new kernel (2.6.32-24.39) today.
>>
>> I reset all boot parameters and /etc/pm/sleep.d to default (as installed).
> 
> After an uptime of over 39 hrs, system went into hibernation again.
> 
> I can find nothing untoward in the logs (except there was an automatic
> system update about 2230 last night, system went to hibernation at
> 0018 this morning, about 1.7 hrs after the update), temps were normal.
> 
> I have made the following BIOS changes, rebooted, and started the
> uptime watch again:
> 
>        ACPI Suspend Type: from S3(STR) to S1(POS)
>        HPET Support     : from enabled (32-bit) to disabled
> 
> I can find lots of info about trouble shooting failure to suspend or
> hibernate, but not much about uncommanded hibernation (or hibernation
> command from unknown sources).

Tom, the most recent updates have included security updates for the
kernel; meaning that a reboot is normally required. Even if you are
doing 'automatic' updates I wouldn't expect the install/update to
automatically reboot your system, but it might be worth checking out.
Try turning off auto update for awhile & see if it makes any difference.
Also check to see if the system hibernates when you do manual updates. I
reckon that you've checked all of your power settings etc., but do you
have any screensavers enabled?

You might also open gconf-editor and search on 'hibernate'
(Edit|Find|check both values and key) and see if there is a setting in
there that may be affecting you. Maybe drastic & I've not tried it, but
maybe just uninstall gnome-power-manager?