Thanks Jeff, 

I'll give it a try, if it doesn't work I'll compile a kernel. The
machine is headless so I don't want to use open firmware to disable
the serial console.

Matt

On Apr 5, 2005 10:44 AM, Jeff Rizzo <riz@tastylime.net> wrote:
> Matthew Reilly wrote:
> 
> >I know I had this problem once before with my 68k macs ( I think)
> >
> >I just installed current on my Umax C500 (with 280mhz G3 upgrade) and
> >it's working great. The only problem is when I unplug the serial
> >console it dumps into the debugger. I know this is because
> >disconnecting the cable sends a break. I read some solutions involving
> >shorting two pins of the serial port with a resistor or recompiling
> >the kernel with "options DDB_FROMCONSOLE=0" but I could swear there
> >was another way to do this. Like changing the system console from the
> >serial port? Does that make any sense?
> >
> >thanks,
> >
> >Matt Reilly
> >
> >
> 
> Well, if the system console is not the serial port (which is settable in
> OpenFirmware), then it won't do this.   There's also a sysctl to set the
> key sequence to trigger DDB - I seem to recall it doesn't work on
> macppc, but I could be wrong.  It's "hw.cnmagic"  Use sysctl to set it
> to a sequence of keys... I sometimes use "|}{".
> 
> +j
> 
> 
>