On Thu, 16 Feb 2023 12:37:51 -0500,
Laurence Perkins wrote:
>
>
>
> >-----Original Message-----
> >From: John Covici <cov...@ccs.covici.com>
> >Sent: Wednesday, February 15, 2023 7:20 AM
> >To: gentoo-user@lists.gentoo.org
> >Subject: Re: [gentoo-user] Re: my 5.15.93 kernel keeps rebooting
> >
> >On Wed, 15 Feb 2023 09:50:27 -0500,
> >Grant Edwards wrote:
> >>
> >> On 2023-02-14, Rich Freeman <ri...@gentoo.org> 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/B0002
> >> J27R8/
> >
> >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.
> >
> >
> https://wiki.gentoo.org/wiki/Kernel_Crash_Dumps is another option if you're
> somehow not getting enough information out of the console. More complex to
> set up, but you can take an actual debugger to the result and hopefully find
> out exactly what's going on.
Well, some progress, but no joy. I found actual messages from
netconsole and it seems no matter what device I put for the source,
netconsole says it doesn't exist. I tried my eno1, and also eth0 and
eth1. In my normal boot sequence, I see that udev renamed eth1 to
eno1, but netconsole still said it does not exist. So, I may have to
use the serial console method, I have to find my cables for that. I
did also try to add net.ifnames=0 to my boot options, but no joy
there.
--
Your life is like a penny. You're going to lose it. The question is:
How do
you spend it?
John Covici wb2una
cov...@ccs.covici.com
