Re: stop "dmesg.boot" from being overwritten on each boot-up

On Mon, Apr 29, 2024 at 5:56 PM Greg 'groggy' Lehey <grog@freebsd.org>
wrote:

> [Trimmed, resequenced for clarity]
>
> On Monday, 29 April 2024 at  5:21:51 -0400, Gerard E. Seibert wrote:
> > On Mon, 29 Apr 2024 08:46:27 +1000, Greg 'groggy' Lehey <
> grog@freebsd.org> stated:
> >> When replying to this message, please copy the original recipients.
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> >> recipients. For more information, see
> >> http://www.lemis.com/questions.html Sent from my desktop computer.
>
> You didn't copy questions@ on your last message.
>
> >> On Sunday, 28 April 2024 at 16:42:58 -0400, Gerard E. Seibert wrote:
> >>> I want to get a copy of what happens when the system locks up while
> >>> booting with the i915ms.ko module. Is there any setting I can use to
> >>> stop overwriting that file or perhaps append the output to it?
> >>
> >> Not that I know of.  But while you're in single user, you can rename
> >> the file.  It would be better to copy it elsewhere in case the entire
> >> contents of the /var/run directory gets removed.
> >
> > The problem with moving the file is that it has already been
> > overwritten by the new boot-up process.
>
> Not when you're in single user.  The file systems are mounted
> read-only, and it's not even sure that /var is accessible.  To rename
> the file you first need to mount -u / and maybe mount the file system
> on which /var is located.  I assumed you knew that, since you did
> other things in single user.
>
> > I might make a suggestion that a mechanism be put in place to allow
> > a user to not automatically overwrite that file. Something like
> > letsencrypt does with its log files.
>
> Sure, that's what the bugs system is for.  And in that connection,
>
> >> Have you checked the bug reports for your i915ms problem?
>
> Greg
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A few questions... What processor do you have? What version of FreeBSD?
What version of drm-kmod (drm-*-kmod)? Which version is between the 'drm'
and 'kmod'?

There is a known problem with drm-515-kmod on 14.0 on Alder Lake. The
problem should be fixed on 14.1 and drm-61-kmod which is getting close. If
you install 14-STABLE, the fix is there.

If your system does not match, you really should open a trouble report.
-- 
Kevin Oberman, Part time kid herder and retired Network Engineer
E-mail: rkoberman@gmail.com
PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683