kern/59260: Panic by integer divide fault in Thinkpad A31p / IRQ Problem?

[Daniel Lang]

The following reply was made to PR kern/59260; it has been noted by GNATS.

From: Daniel Lang <dl at leo.org>
To: freebsd-gnats-submit at FreeBSD.org
Cc: imp at freebsd.org, jhb at freebsd.org
Subject: Re: kern/59260: Panic by integer divide fault in Thinkpad A31p / IRQ Problem?
Date: Wed, 3 Dec 2003 13:48:35 +0100

 Dear Warner, Dear John,
 
 I believe the problem is solved now. Although the live debugging
 did not turn up anything useful to me, meanwhile, I stumbled
 upon something else:
 
 In a newsarticle
 
 hw.pci.allow_unsupported_io_range
 
 was mentioned, together with a (different) problem on a
 Thinkpad (different model). I set this sysctl to 1
 in /boot/loader.conf and now, it appears the system works
 like charm now.
 
 I'm not sure how to rate this. I guess it means quirky
 hardware, that is out of spec, but there exists a workaround.
 I'm happy that my system seems to work now, but I guess
 the panics should be prevented. Maybe the quirky hardware
 can be detected, a big warning messages issued during boot, and
 the workaround activated? Well, I guess that would be difficult
 if not impossible, otherwise it would have been done already.
 
 Please submit this workaround to the PR (my last email to you
 and freebsd-gnats-submit@ was somehow not included into the
 audit trail). Feel free to close it then.
 
 Thanks again for your explanations.
 
 Best regards,
  Daniel
 -- 
 IRCnet: Mr-Spock              - Truth lies in the eye of the beholder - 
  Daniel Lang * dl at leo.org * +49 89 289 18532 * http://www.leo.org/~dl/