Messages in this thread | | | Date | Mon, 7 Jun 1999 07:44:27 -0400 (EDT) | From | "Steven N. Hirsch" <> | Subject | Re: Oops trace of 2.2.9-ac2 lockups |
| |
On Mon, 7 Jun 1999, Keith Bennett wrote:
> > hi, sorry for the unsolicited mail but i didnt want to clog up > the list with yet another stupid question ...
Actually, IMHO, many folks could benefit from this discussion. So, I'm taking the liberty of posting to the kernel list.
> > Steven N. Hirsch wrote: > > After considerable grief, I got serial console output working and captured > > two of the lockups. > > i suspect i may be getting the same problems - i have a similar setup > (Dual-PII400, 128Mb ram, advansys scsi card, 2.2.9-ac2 kernel) > but i cant get any mesages from the kernel when it freezes. > > how did you get this console output to work? maybe then i could > generate some usefull information to send to the list.
Hi Keith,
You must rebuild the kernel with serial console support - in _addition_ to the usual VGA + console on virtual terminal. Then, take a look at:
linux/Documentation/serial-console.txt
for the gory details. I added the following line to the 2.2.9-ac2 lilo.conf stanza:
append="console=ttyS1,9600 console=tty0"
Make sure your /dev/console device is major-5, minor-1! Mine was not.
Before rebooting, delete any existing /etc/ioctl.save file.
Then the system restarts, kernel messages will appear on both the VGA console and the serial port. I connected the offending box, via a null-modem adapter, to a second machine running minicom in text capture mode. This works like a champ - capturing the entire oops, which may then be run through ksymoops for decoding.
Hope this helps.
Steve
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |