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  • boot.cfg consdev ucom0 ?

    From bill@oh.no@21:1/5 to All on Mon Feb 24 22:27:47 2020
    Was playing around with an old serial terminal but all I had for cabling
    was a USB RS-232 adapter. I can do the following and get a login:

    #/etc/ttys
    ttyU0 "/usr/libexec/getty std.9600" vt100 on secure local

    So that works but one doesn't get to interact with the bootloader nor
    see the subsequent boot process; for that one needs to specify a port in /etc/boot.cfg using 'consdev' but my reading of boot.cfg(5) and boot(8)
    only show the following 'consdev' options:

    com[0-3], com[0-3]kbd, auto

    Should "auto" work or is there some other way to specify a USB connected
    serial terminal for console?

    -mb

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  • From Hauke Fath@21:1/5 to bill@oh.no on Tue Jul 21 10:19:36 2020
    <bill@oh.no> wrote:

    [console on USB serial adapter]

    Was playing around with an old serial terminal but all I had for cabling
    was a USB RS-232 adapter.

    Unfortunately, the bootloader and early kernel subsystems do not support serial-over-usb for console. There are orders of magnitude in complexity between pushing a byte to an UART, and through a USB stack.

    Cheerio,
    Hauke

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