Re: [gentoo-user] Re: my 5.15.93 kernel keeps rebooting

[John Covici]

On Wed, 15 Feb 2023 09:50:27 -0500,
Grant Edwards wrote:
>
> On 2023-02-14, Rich Freeman <rich0@g.o> wrote:
>
> > Where are you getting this from, the system log/journal?  This doesn't
> > seem like a clean shutdown, so if it is a kernel PANIC I wouldn't
> > expect the most critical info to be in the log (since it will stop
> > syncing to protect the filesystem).  The details you need probably
> > will be displayed on the console briefly.  You can also enable a
> > network console, which will send the dmesg output continuously over
> > UDP to another device.  This won't be interrupted by a PANIC unless
> > there is some issue with the hardware or networking stack.
>
> If you've got a serial port[1], you could also set up serial
> logging. Though using serial ports have become a bit of a lost art,
> the serial console code in the kernel is pretty carefully designed to
> be the last man standing when things start to die. It's possible
> (though I wouldn't say probable) that a serial console will be able to
> show you stuff closer to the event horizon than a network console can.
>
> Anyway, since still I'm in the serial port business (yes, there are
> still plenty of people using serial ports in industrial settings) I
> had to mention it...
>
> [1] For this purpose you want a plain old UART on the motherboard type
>     seial port. You'd be surprised how many motherboards still have
>     them. Even though they're never brought out to a DB9 connector on
>     the back panel, there's often an 8-pin header on the edge of the
>     board somewhere, so you'd need one of these:
>
>     https://www.amazon.com/C2G-27550-Adapter-Bracket-Motherboards/dp/B0002J27R8/

I do have one which I use for my speech synthesizer.  I also have one
on my other box which I could hook up -- if I can find my null modem
cable.  I think I will try the netconsole first and the serial console
if that does not work.

Thanks for the hint.

-- 
Your life is like a penny.  You're going to lose it.  The question is:
How do
you spend it?

         John Covici wb2una
         covici@××××××××××.com