losing serial console

[Bjoern A. Zeeb]

On Thu, 8 Jul 2004, Bjoern A. Zeeb wrote:

> had a kernel yesterday with SCHED_4BSD where boot -h and serial
> console worked fine. Then I had built a kernel (same sources with
> SCHED_ULE and with updated sources somewhen this night).
>
> After console=comconsole pxeboot prints things on serial console - so
> this works; but after boot (-h) nothing is printed with both ULE
> kernels.
>
> checked sio0 and sio1 for output - just in case. also checked the screen
> but neither with boot -h nor with boot anything appears there either.
>
> anyone any ideas ?

ok I further tested things and cannot get serial console with either
4BSD or ULE with sources from around 20040707-2120 UTC so it's not a
problem of the scheduler.

I'd really like to know why the thing is rebooting somewhen later but
it's some kind of problem w/o console.

Could it be a problem with pxeboot ? (I also had tried older ones I
had lying around but no change).

I tested with and without the following in make.conf:
BOOT_COMCONSOLE_PORT=  0x3F8
BOOT_COMCONSOLE_SPEED= 9600


here's what a show gives before booting:

--- cut ---
LINES=24
boot.netif.gateway=...
boot.netif.hwaddr=...
boot.netif.ip=...
boot.netif.netmask=...
boot.nfsroot.nfshandle=X0000000000000000000000000000000000000000000000000000000000000000X
boot.nfsroot.path=/pxeroot
boot.nfsroot.server=...
boot_verbose=1
console=comconsole
currdev=pxe0:
interpret=OK
kernelname=/boot/kernel/kernel
loaddev=pxe0:
module_path=/boot/kernel;/boot/modules
vfs.root.mountfrom=ufs:/dev/md0c
--- cut ---


Anyone ?

-- 
Bjoern A. Zeeb				bzeeb at Zabbadoz dot NeT