Re: git: df065f699f1f - main - stand: More sensible defaults when ConOut is missing

On Fri, Sep 23, 2022 at 6:47 PM Cy Schubert <Cy.Schubert@cschubert.com>
wrote:

> In message <7e773164-4317-ba17-1f26-1f382cf46fb3@FreeBSD.org>, John
> Baldwin
> wri
> tes:
> > On 9/23/22 2:29 PM, John Baldwin wrote:
> > > On 8/26/22 9:18 PM, Warner Losh wrote:
> > >> The branch main has been updated by imp:
> > >>
> > >> URL:
> https://cgit.FreeBSD.org/src/commit/?id=df065f699f1ff819bb9607c44a675
> > 4275ab335ed
> > >>
> > >> commit df065f699f1ff819bb9607c44a6754275ab335ed
> > >> Author:     Warner Losh <imp@FreeBSD.org>
> > >> AuthorDate: 2022-08-26 21:46:33 +0000
> > >> Commit:     Warner Losh <imp@FreeBSD.org>
> > >> CommitDate: 2022-08-27 04:17:56 +0000
> > >>
> > >>       stand: More sensible defaults when ConOut is missing
> > >>
> > >>       When ConOut is missing, we used to default to serial. Except we
> did
> > it
> > >>       in the worst way possible by just setting the howto bits and not
> > >>       updating the console setting, which lead to weird behavior
> where we'
> > d
> > >>       get some things on the video port, others on serial.
> > >>
> > >>       Instead, set console to "efi,comconsole" for this case. Also set
> > >>       RB_MULTIPLE always (so we get dual consoles from the kernel)
> and or
> > in
> > >>       RB_SERIAL when we can't find GOPs that suggest the precense of
> a vid
> > eo
> > >>       console. This will put output in the most places and have a
> sensible
> > >>       default for 'primary' console.
> > >>
> > >>       Sponsored by:           Netflix
> > >>       Reviewed by:            emaste, manu
> > >>       Differential Revision:  https://reviews.freebsd.org/D36299
> > >
> > > One possibly surprising result of this is that I did not get dual
> console
> > > output on my rpi after this.  (Curiously this only affected my arm64
> image
> > > but not my armv7 image.)  Loader output goes to both, but kernel
> output is
> > > only on the video console (which I don't normally use for my pi).
> (Also,
> > > none of the ANSI escape sequences used by the loader work on the pi's
> video
> > > console, so once the menu starts it just looks like raw ANSI code
> garbage
> > > until the kernel starts booting.)
> > >
> > > Not sure if this warrants UPDATING as the effect is that the serial
> console
> > > seems to stop working?  The lack of working dual console output is
> perhaps
> > > the only real bug.  Not sure what is up there.
> >
> > FWIW, using 'console="comconsole,efi"' did not work as a workaround.
> Same
> > results (used the video console only for the kernel).  Had to use
> > 'console="comconsole"' in /boot/loader.conf.
>
> On one of my two machines with console="comconsole,vidconsole" failed to
> get past loading the kernel. Booting a rescue USB disk and replacing
> console with "comconsole" only resolved the hang.
>
> I'm not sure why it affected one and not the other as both are identical
> hardware.
>

This is indeed weird. Both EFI or BIOS boot?

Warner