STRANGE SHUT DOWNS

[Simon Dawe]

You might also want to run a memory test.  I had a similar problem that I
thought was being caused by software, but it was actually a stick of ram
that had gone way south.
I use memtest86 to check for any memory problems. http://www.memtest86.com/

On 4/2/07, Peter Whittaker <pwwnow at gmail.com> wrote:
>
> On Sun, 2007-01-04 at 19:10 -0400, Maurice Murphy wrote:
> > I usually leave my computer on 24/7.  My power settings are set at
> > Never/Never.  Yet, for some reason or other, after a period of
> > inactivity, ubuntu reverts to its login screen.  I've had a look
> > at my BIOS settings and everything seems normal.  What gives?
> >
> > Has anyone experienced the same problem, or should I file a bug report?
> > I'm running Feisty Beta, fully updated.
>
> There are some known problems with certain machines overheating and
> shutting themselves down (the kernel shuts down to prevent damage to the
> machine). For example, there's https://launchpad.net/bugs/22336
>
> What should you do next? Hmm, that's a tough one. Depending on far you
> feel like going to triage, you can review that bug report and try to
> determine if it applies to you (refer to [1], below).
>
> You can also try searching launchpad for keywords such as unexpected
> reboot, unexpected shutdown, surprise reboot, surprise shutdown, etc.
>
> Another thing to check is that the CPU heatsink is properly attached and
> bonded. Please note that I am not a hardware guy, so I cannot help you
> much with that. There is a device glued to your CPU that is covered with
> fins or prongs and its whole purpose in life is to dissipate heat from
> the CPU. If it as come loose, or was never properly attached, the CPU
> cannot cool properly, and the machine may shutdown occasionally.
>
> The odd thing is that your session is ending whilst the machine is idle,
> and one would think an overheating problem more likely when the machine
> is very active.
>
> BUT! If you are running Gnome screensaver, your machine is NEVER really
> idle: Some of those screensavers are very CPU intensive, which is why
> I've set my screensaver to blank screen. Try that, and if the problem
> persists, it's probably something else. But if the problem goes away,
> well, it might suggest an overheating problem.
>
> Those are my $0.02, others may have more useful thoughts,
>
> pww
>
> [1] There is a quick way to determine if this bug is NOT affecting your
> machine - try this command in a terminal window:
>
> cat /proc/acpi/processor/CPU0/throttling
>
> If the result is NOT "<not supported>", then your machine is NOT subject
> to this bug. Sorry for the triple negative... ...to put it another way,
> if you try that command and the result is "<not supported>", then your
> machine MAY be subject to that bug (not IS, but MAY) - hence all the
> negatives the first time round (if not "<not supported>", not the same
> bug). More work would be required to determine if that bug is in fact at
> work, hence the triple negative, which is an easy way to eliminate that
> particular bug.
>
>
>
>
>
> --
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> ubuntu-ca at lists.ubuntu.com
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>
>
>
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