Re: not working /dev/console

Van: Daniel Braniss <danny@cs.huji.ac.il>
Datum: maandag, 16 december 2024 09:23
Aan: Kurt Jaeger <pi@freebsd.org>
CC: Warner Losh <imp@bsdimp.com>, Freebsd-stable List <stable@freebsd.org>
Onderwerp: Re: not working /dev/console
> 
> 
> > On 9 Dec 2024, at 10:35, Daniel Braniss <danny@cs.huji.ac.il> wrote:
> >
> > hi Kurt & Warner:
> > im trying on a PCengines apu2 fbsd 14.2, but have the same symptoms, no console.
> > dmesg|grep uart -> nothing.
> > after some trials the best i have is:
> >   the bsd-menu showing
> >       5. Cons: Serial
> > and only the kernel messages.
> >
> > no /dev/console, no /dev/ttyu0, but can remote login.
> >
> > btw, all works fine with a 13.1 kernel
> >
> >> On 8 Dec 2024, at 20:27, Kurt Jaeger <pi@freebsd.org> wrote:
> >>
> >> Hi!
> >>
> >>> So, there should be a line like
> >>>
> >>> uart0: console (115200,n,8,1)
> >>>
> >>> if not, then hw.uart.console isn't making it through.
> >>
> >> So somehow the uarts are not found during initialization ?
> >>
> >>> If you are using a custom kernel,
> >>
> >> It's the generic kernel.
> >>
> >>> you can add that to a file and add 'env
> >>> /path/to/file/on/build/host' to the kernel config to wire that into the
> >>> kernel, should the boot path make it hard to set an initial environment
> >>> otherwise. Also, DHCP should still try to grab /boot/loader.conf from the
> >>> tftp/http server as well. That might also be something that needs debugging
> >>> (or hopefully just correct config).
> >>
> >> I'll investigate further.
> 
> 
> I made a diff from booting 13.1 and 14.2 with boot_verbose, and this stands out:
> (only in the 13.1)
> 
> -pcib0: allocated type 4 (0x3f8-0x3f8) for rid 0 of uart0
> -pcib0: allocated type 4 (0x3f8-0x3f8) for rid 0 of uart0
> -uart0: <16550 or compatible> at port 0x3f8 irq 4 flags 0x10 on isa0
> -pcib0: allocated type 4 (0x3f8-0x3f8) for rid 0 of uart0
> -uart0: console (115200,n,8,1)
> -ioapic0: routing intpin 4 (ISA IRQ 4) to lapic 2 vector 53
> -uart0: fast interrupt
> -uart0: PPS capture mode: DCD
> -pcib0: allocated type 4 (0x2f8-0x2f8) for rid 0 of uart1
> -pcib0: allocated type 4 (0x2f8-0x2f8) for rid 0 of uart1
> -uart1: <16550 or compatible> at port 0x2f8 irq 3 on isa0
> -pcib0: allocated type 4 (0x2f8-0x2f8) for rid 0 of uart1
> -ioapic0: routing intpin 3 (ISA IRQ 3) to lapic 3 vector 53
> -uart1: fast interrupt
> -uart1: PPS capture mode: DCD
> 
> does this help?
> cheers,
>     danny
> 
> 
> >>
> >> --
> >> pi@FreeBSD.org         +49 171 3101372                  Now what ?
> >
> 
>  
> 
> 
> 


Hi,

A change was made that uart does not attach on isa anymore.
I think this was the commit about it:
https://cgit.freebsd.org/src/commit/?h=releng/14.2&id=74b9fc7adcf4afb1c3039267e338c3cfdf022957

I don't know much about the details. Somebody else can tell more.

Regards,
Ronald.