Subject: Re: kern/11321: siop appears to hang my machine
To: Chris Jones <email@example.com>
From: Manuel Bouyer <firstname.lastname@example.org>
Date: 10/29/2000 21:13:17
On Fri, Oct 27, 2000 at 02:54:54PM -0600, Chris Jones wrote:
> Okay, more data:
> With ddb.onpanic = 0, I get essentially the same behavior: It locks
> up, and nothing happens. I gave it five minutes, just in case it was
> taking a long time to write the crash dump before it rebooted.
> Also, it appears that the lockup actually happens when the chio SCSI
> command completes: I can run the command, switch into X, and do stuff
> for a couple of minutes. Then when the changer finishes moving its
> media around, the machine hangs.
> I tried Manuel's suggestion of doing lots of I/O, to see if that would
> trigger it: no luck. X was running at the time, but it was on a
> different terminal. I stayed on ttyE0 and did a:
> # chio move slot 0 drive 0 & tar clf /dev/null /usr
> The tar took longer than the chio, and everything worked just fine.
> What next? SCSIDEBUG?
If it can't be reproduced in text mode it'll be harder.
Any chance to connect through a serial console ?
Connect a null-modem cable between 2 PCs. On the one which will be the term
use tip to connect to the serial port:
(check /etc/remote that the console entry points to the rigth tty)
Boot the other PC and at the boot prompt type
(or com1 if the cable is connected to com1 :)
The boot prompt should now appear on the serial term.
To enter ddb send a break:
enter ~ .
You should now be able to log in on anorther VT and start X
Manuel Bouyer, LIP6, Universite Paris VI. Manuel.Bouyer@lip6.fr