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Capturing OOPS through the serial port
I am trying to capture OOPS through the serial port.
/usr/src/linux/Documentation/serial-console.txt tells me that
You can specify multiple console= options on the kernel command line.
Output will appear on all of them. The last device will be used when
you open /dev/console. So, for example:
So I am trying to specify Serial port /dev/ttyS0 as another console, and
the OOPS message should be redirected to that too.
So I took the following steps:
1) Booted Linux with
at the LILO prompt
2) Put a LOOPBACK connector(tested it also... its working fine) on
Serial Port ttyS0
3) Opened up 2 Xterm sessions simultaneously
4) cat /dev/ttyS0 in Xterm 1
5) Generated OOPS by dereferencing a NULL pointer through a Kernel
module in Xterm 2
6) Looking at Xterm 1 hoping in vain to see the OOPS coming there
OOPS is being Generated as I can see it using `dmesg`
Before generating the OOPS i did this experiment:
In Xterm 2, I did
# echo Yahoo >/dev/ttyS0
I see the messgae coming in Xterm 1 where I've done a
# cat /dev/ttyS0
(the Yahoo comes faithfully on Xterm 1, but comes after exponentially
rising NEWLINES repetitively)
But once the OOPS has been generated, this experiment fails! 2
Please give me some Enlightenment!
What can I be doing wrong?
Any more suggestions as to how I can capture OOPS through the Serial
port are welcome.
R o h i t R o m e h a r s h a n S i n g h