help with inittab

[Scott Coulter]

Chris,

Does your serial output stop after "Freeing unused kernel memory..."

If it does, you may have an interrupt problem with the UART.  I had to
track down that very problem the other day.  As a test, even if my UART
interrupt was purposely misconfigured, I still saw all of the output up
to and including "Freeing unused kernel memory..."

Scott




___________________________________________________________________

  Scott N. Coulter
  Senior Software Engineer
  
  Cyclone Microsystems          
  370 James Street              Phone:  203.786.5536 ext. 118
  New Haven, CT 06513-3051      Email:  scott.coulter at cyclone.com
  U.S.A.                        Web:    http://www.cyclone.com
___________________________________________________________________

-----Original Message-----
From: linuxppc-embedded-bounces+scott.coulter=cyclone.com at ozlabs.org
[mailto:linuxppc-embedded-bounces+scott.coulter=cyclone.com at ozlabs.org]
On Behalf Of Chris Dumoulin
Sent: Friday, June 09, 2006 3:15 PM
To: Steve Iribarne (GMail)
Cc: linuxppc-embedded at ozlabs.org
Subject: Re: help with inittab

The init is from Busybox. Since I'm getting output from my serial port 
during the kernel boot process, I think it's safe to say that my 
/dev/ttyS0 is properly configured. Besides passing the kernel argument 
console=ttyS0,57600, is there anything else I need to do to properly 
configure the console? I've looked through my kernel configuration to 
make sure that any serial device or console related stuff was enabled 
and configured.

I'm feeling pretty stumped.

- Chris

Steve Iribarne (GMail) wrote:

> On 6/9/06, Chris Dumoulin <cdumoulin at ics-ltd.com> wrote:
>
>> I've now determined that my kernel seems to stop in the following
line
>> of code, in the function init(void * unused), in init/main.c:
>> run_init_process("/sbin/init");
>
>
> Who's init are  you using??
>
> Are you using Busyboxes or sysinit from GNU?
>
>
>> I've determined that it stops at this call by stepping through the
code
>> with a BDI2000.
>>
>> My boot arguments are:
>> console=ttyS0,57600n8 ip=off root=/dev/ram0 rw
>>
>> My current inittab is:
>> ::sysinit:/etc/rc.sh
>> ::ctrlaltdel:/sbin/reboot
>> ::shutdown:/sbin/swapoff -a
>> ::shutdown:/bin/umount -a -r
>> ::restart:/sbin/init
>> ::respawn:/bin/sh
>>
>> I've tried adding an "echo" command to the /etc/rc.sh script that is
>> called, but I don't see any output. I've also trying changing the
>> ::sysinit line in inittab to point to some non-existent script, to
see
>> if I'll get some error message, but I still see nothing. Is it
possible
>> that /sbin/init is dying before it gets to the point of reading
inittab?
>> Any ideas?
>>
>> Regards,
>> Chris Dumoulin
>>
>>
>> Wolfgang Denk wrote:
>>
>> >In message <44888B92.40409 at ics-ltd.com> you wrote:
>> >
>> >
>> >>I am using the linux kernel 2.6.15 and initrd ramdisk image from
ELDK
>> >>4.0. Currently, I seem to be able to boot without errors, but after

>> the
>> >>root filesystem is mounted, things just stop.
>> >>
>> >>
>> >
>> >And  what's  your  console  device?  Are  you  passing  any
console=
>> >arguments  on  the  command  line?  Is the corresponding device
entry
>> >present in the /dev/directory?
>> >
>> >Best regards,
>> >
>> >Wolfgang Denk
>> >
>> >
>> >
>>
>> -- 
>> *--Christopher Dumoulin--*
>> Software Team Leader
>>
>> <http://ics-ltd.com/>
>> <http://ics-ltd.com/>
>>
>> Interactive Circuits and Systems Ltd.
>> 5430 Canotek Road
>> Ottawa, ON
>> K1J 9G2
>> (613)749-9241
>> 1-800-267-9794 (USA only)
>>
>>
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>


-- 
*--Christopher Dumoulin--*
Software Team Leader

<http://ics-ltd.com/>
<http://ics-ltd.com/>

Interactive Circuits and Systems Ltd.
5430 Canotek Road
Ottawa, ON
K1J 9G2
(613)749-9241
1-800-267-9794 (USA only)

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