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Re: O2 and 128Mb

To: Giuseppe Sacco <giuseppe@eppesuigoccas.homedns.org>
Subject: Re: O2 and 128Mb
From: "Ilya A. Volynets-Evenbakh" <ilya@total-knowledge.com>
Date: Fri, 21 Jan 2005 12:40:58 -0800
Cc: linux-mips@linux-mips.org
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drop the console=tty0 part

Giuseppe Sacco wrote:

Il giorno gio, 13-01-2005 alle 11:26 -0800, Ilya A. Volynets-Evenbakh ha
scritto:
Please set up serial console, and find out where kernel crashes.
It is pretty obvious that happens before gbefb is initialized, but
after ip32-reset is setup (which sets up timer to blink the LED),
thus should be able to give you some output on serial port.

Sorry for being late,
I tried: I found a laptop equipped with serial port, plugged a nullmodem
serial cable on the laptop serial port and on the serial port labeled "1"
of the O2 machine. I started minicom on the laptop and selected ttyS0, 9600,
8bit, noparity, 1 stop bit.

Then changed in /etc/arcboot.conf, my append line from
append="root=/dev/sda1" to
append="root=/dev/sda1 console=ttyS0,9600n8 console=tty0"

shutdown the O2, unplugged power cable, waited, plugged, swithed on.
Then I changed the OSLoadFilename correctly, and typed "boot".

During the supposed boot, minicom doesn't display *any* character. It
just change the online label from "00:00" to "00:01". Nothing more,

Then, as already explained, the red led on the SGI O2 starts blinking.

I then tried the same "append" line with my working kernel and it worked
as expected: writing to both the serial console and the O2 screen.

How may I better debug the problem? Anyone have a working kernel or,
maybe, a newer arcboot?

Thanks,
Giuseppe

Il giorno gio, 13-01-2005 alle 11:26 -0800, Ilya A. Volynets-Evenbakh ha
scritto:
Please set up serial console, and find out where kernel crashes.
It is pretty obvious that happens before gbefb is initialized, but
after ip32-reset is setup (which sets up timer to blink the LED),
thus should be able to give you some output on serial port.

Oh, and what does it have to do with fact you have 128M of RAM?
Giuseppe Sacco wrote:

Il giorno mer, 12-01-2005 alle 23:49 -0800, Ilya A. Volynets-Evenbakh ha
scritto:


"Cannot boot" is not very good describtion of the problem.

You are right.
Arcboot is Debian version 0.3.8.4. I select the stanza arcboot should
use, with 'setenv OSLoadFilename <stanza>" and the kernel is loaded.
Then it s ran and the only change I see is the red led blinking. The
screen messages are:

Loading program segment 1 at 0x80004000, offset=0x4000, size = 0x3df086
Zeroing memory at 0x803e3086, size = 0x2bf9a
Starting 32-bit kernel

Bye,
Giuseppe

--
Ilya A. Volynets-Evenbakh
Total Knowledge. CTO
http://www.total-knowledge.com


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