Re: Serial console only works after reboot?

From: Bruce M Simpson <bms_at_spc.org> Date: Mon, 5 Jan 2004 00:38:03 +0000 · This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:37:36 UTC

On Sun, Jan 04, 2004 at 04:41:03PM -0700, M. Warner Losh wrote:
> Somewhere along the way, it gets set to 115200.  Maybe it is
> initialized to 115200 by the boot blocks?  I think once there's a
> divisor programmed into the serial port, the kernel console code
> doesn't change it.  I could be wrong about this, however....

Try installing boot0sio as your boot manager. It specifically requests 9600
8-N-1 via BIOS calls. However this does mean that boot selection has to
happen over COM1.

BMS