Kernel freezes instead of panicking

[David Kahurani]

On Mon, Feb 7, 2022 at 5:00 PM Wonhyuk Yang <vvghjk1234 at gmail.com> wrote:

> On Mon, Feb 7, 2022 at 7:59 PM David Kahurani <k.kahurani at gmail.com>
> wrote:
> >> I have an Ubuntu system on which I have compiled a kernel and booted
> into it. I mostly based the config on the old configuration.
> >>
> >> I expect that running this command [1] should lead to a kernel panic
> but strangely it does not and it only leads to freeze.
> >> I don't see the kernel panic messages but the system does freeze and I
> have to use the power button to reboot. It is possible that I am supposed
> to configure something but have not, maybe I missing something. Could
> someone tell me what I am missing out on?
> >
> >  echo c > /proc/sysrq-trigger [1]
>
>
Thanks, this could help too.

I figured I could use kdump to save the dmesg logs but it doesn't seem to
work with later kernels.


> Did you use the GUI terminal? In my ubuntu, I can see the panic
> message when I used virtual terminal(Ctrl+Alt+F3).
>
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