Re: Console serial speed

From: Aaron Wohl (avwohl_at_awohl.com)
Date: 07/26/03

  • Next message: David Gilbert: "wi in access point mode." 
    To: "Russell Cattelan" <cattelan@xfs.org>, freebsd-hackers@freebsd.org
Date: Sat, 26 Jul 2003 09:15:43 -0600

    On 25 Jul 2003 13:06:28 -0500, "Russell Cattelan" <cattelan@xfs.org>
    said:
    > How does one set the serial speed of the console.
    > I changed the boot loader speed to 57600 in make.conf
    > but the kernel seems to chose random speeds each time
    > it's booted.
    > Sometimes it's 9600 sometimes it 115200 other times
    > it's 38400.
    >
    > Note this is on 5.x current
    >
    > Russell Cattelan
    Subject notes on setting up freebsd serial console
    -must be com1
    -com1 must be at port 0x3F8 irq 4
    -in bios set the port and irq as above
    -in bios set serial redirection to com1
    -in bios set baud rate 115200
    -in bios set RTS/CTS flow control
    -edit (or create) /etc/make.conf to add these lines:
    BOOT_COMCONSOLE_PORT= 0x3F8
    BOOT_COMCONSOLE_SPEED= 115200
    -cd /sys/boot
    -make clean
    -make
    -make install
    -fdisk -B
    No im not kidding. Part of the boot knowing baud rate loader lives in
    the main disk boot block.
    -cd /boot
    -edit loader.conf
    -add a line:
    console=comconsole
    -edit /boot.config make it read (with a return after it):
    -Dh
    (the above is minus D h return, thats 4 characters)
    -cd /usr/src/sys/i386/conf
    -edit PASODOBLE (or whatever your kernconf is called)
    -add:
    options CONSPEED=115200 # Console Redirection
    -cd /usr/src
    -make buildkernel KERNCONF=PASODOBLE
    -make installkernel KERNCONF=PASODOBLE
    -reboot
    -pray
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