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From: mike3 on 22 Apr 2008 16:56
Hi.

I have an old computer with a Pentium 3 CPU in it that I repurposed to
use as a headless router point to access a wireless network, but it
seems to be having a strange problem. Namely, it'll "shut down" like
once a day or so -- if I hook a head up to it my monitor gets no
signal (yellow flashing light), yet the machine is still on. This
reminds me of some sort of sleep/power-saving mode or something. Is
that what it is, and if so how do I disable it? I need full uptime.

PS. The distribution I've got on there is OpenSUSE, if you need to
know.
From: Darren Salt on 22 Apr 2008 22:28
I demand that mike3 may or may not have written...

> I have an old computer with a Pentium 3 CPU in it that I repurposed to use
> as a headless router point to access a wireless network, but it seems to be
> having a strange problem. Namely, it'll "shut down" like once a day or so
> -- if I hook a head up to it my monitor gets no signal (yellow flashing
> light), yet the machine is still on. This reminds me of some sort of
> sleep/power-saving mode or something. Is that what it is, and if so how do
> I disable it? I need full uptime.

Get it to log to another computer via serial console or netconsole. That'll
at least tell you whether it's panicking or just locking up.

--
| Darren Salt | linux or ds at | nr. Ashington, | Toon
| RISC OS, Linux | youmustbejoking,demon,co,uk | Northumberland | Army
| + Use more efficient products. Use less. BE MORE ENERGY EFFICIENT.

You will know happy motorcyclist by the insect stains on his teeth.
From: mike3 on 22 Apr 2008 22:37
On Apr 22, 8:28 pm, Darren Salt
<n...(a)youmustbejoking.demon.cu.invalid> wrote:
> I demand that mike3 may or may not have written...
>
> > I have an old computer with a Pentium 3 CPU in it that I repurposed to use
> > as a headless router point to access a wireless network, but it seems to be
> > having a strange problem. Namely, it'll "shut down" like once a day or so
> > -- if I hook a head up to it my monitor gets no signal (yellow flashing
> > light), yet the machine is still on. This reminds me of some sort of
> > sleep/power-saving mode or something. Is that what it is, and if so how do
> > I disable it? I need full uptime.
>
> Get it to log to another computer via serial console or netconsole. That'll
> at least tell you whether it's panicking or just locking up.
>

How do you get a serial console out of a PC? And furthermore, when
it's doing
this thing I cannot log in via network either.
From: Darren Salt on 22 Apr 2008 23:08
I demand that mike3 may or may not have written...

> On Apr 22, 8:28�pm, Darren Salt
> <n...(a)youmustbejoking.demon.cu.invalid> wrote:
>> I demand that mike3 may or may not have written...
>>> I have an old computer with a Pentium 3 CPU in it that I repurposed to
>>> use as a headless router point to access a wireless network, but it
>>> seems to be having a strange problem. Namely, it'll "shut down" like
>>> once a day or so -- if I hook a head up to it my monitor gets no signal
>>> (yellow flashing light), yet the machine is still on. This reminds me
>>> of some sort of sleep/power-saving mode or something. Is that what it
>>> is, and if so how do I disable it? I need full uptime.
>> Get it to log to another computer via serial console or netconsole.
>> That'll at least tell you whether it's panicking or just locking up.

(Actually, you can do that by pinging it. What this will do is allow you to
capture the kernel log, including the panic if there is one; and yes, I've
captured panics in this way.)

> How do you get a serial console out of a PC?

http://www.mjmwired.net/kernel/Documentation/serial-console.txt
http://www.mjmwired.net/kernel/Documentation/networking/netconsole.txt

> And furthermore, when it's doing this thing I cannot log in via network
> either.

That's expected.

--
| Darren Salt | linux or ds at | nr. Ashington, | Toon
| RISC OS, Linux | youmustbejoking,demon,co,uk | Northumberland | Army
| + Travel less. Share transport more. PRODUCE LESS CARBON DIOXIDE.

Inside every large problem, there is a small problem trying to get out.
From: The Natural Philosopher on 23 Apr 2008 07:25
Darren Salt wrote:
> I demand that mike3 may or may not have written...
>
>> I have an old computer with a Pentium 3 CPU in it that I repurposed to use
>> as a headless router point to access a wireless network, but it seems to be
>> having a strange problem. Namely, it'll "shut down" like once a day or so
>> -- if I hook a head up to it my monitor gets no signal (yellow flashing
>> light), yet the machine is still on. This reminds me of some sort of
>> sleep/power-saving mode or something. Is that what it is, and if so how do
>> I disable it? I need full uptime.
>
> Get it to log to another computer via serial console or netconsole. That'll
> at least tell you whether it's panicking or just locking up.
>
Possibly it is going 'to sleep'

leave it on with a keyboard attached. If hitting a key wakes it up,
that's confirmatory evidence.

Not sure whether the solution lies in the bios or the Linux setup.



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