kdb has no working console and has switched itself off

[Hasan Rashid]

This is only with the 2.6.22.19 kernel. I have a similar device (WRAP board)
with the same setup, just a serial port connected to my computer and KDB
works just fine on that. 

Kernel boot post is as follows:

Linux version 2.6.22 (root at devserver1) (gcc version 3.4.6 20060404 (Red Hat
3.4.6-9)) #9 Wed Jul 16 14:33:49 PDT 2008
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 0000000008000000 (usable)
 BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved)
...
....
.....
kdb: Initialization failed - no console.  kdb is disabled.
kdb version 4.4 by Keith Owens, Scott Lurndal. Copyright SGI, All Rights
Reserved
.....
....
...

Regards, Hasan R.

> -----Original Message-----
> From: kdb-bounce at oss.sgi.com [mailto:kdb-bounce at oss.sgi.com] On Behalf Of
> Jay Lan
> Sent: Thursday, July 17, 2008 12:17 PM
> To: Hasan Rashid
> Cc: kdb at oss.sgi.com
> Subject: Re: kdb has no working console and has switched itself off
> 
> Hasan Rashid wrote:
> > I am running Linux 2.6.22.19 with the kdb-patch, on an embedded device.
> I am
> > connected to the device via serial port as that is the only interface
> > available, other than Ethernet. When my kernel boots up I see the
> following
> > message " kdb has no working console and has switched itself off". And
> > whenever, I try echo "1" > /proc/sys/kernel/kdb I get the same message.
> Why
> > is the kernel disabling it? What do I need to enable in the kernel?
> 
> You need a console to use KDB.
> 
> Can anybody with embedded device experience help him? Thanks!
> 
> - jay
> 
> >
> > TIA!
> >
> > Regards, Hasan R.
> >
> >
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