losing serial console
Robert Watson
rwatson at freebsd.org
Thu Jul 8 09:18:55 PDT 2004
On Thu, 8 Jul 2004, Bjoern A. Zeeb wrote:
> 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.
If you back out to before July 2, 2004, does life get any better? That's
the day John committed the preemption changes.
> 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:
<snip>
> Anyone ?
All your settings looke reasonable to me. Has anything changed WRT ACPI
use on your system in the last week? Nate committed the ACPI blacklist
stuff, and I have several boxes that fail to properly use serial ports
when not using ACPI. If ACPI suddenly turned off, that could have
triggered the problem?
Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
robert at fledge.watson.org Principal Research Scientist, McAfee Research
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