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Date:      Tue, 19 Sep 2000 16:41:04 -0700
From:      Mike Smith <msmith@freebsd.org>
To:        Dennis <dennis@etinc.com>
Cc:        hackers@freebsd.org
Subject:   Re: Serial port locks up 4.1 
Message-ID:  <200009192341.QAA00943@mass.osd.bsdi.com>
In-Reply-To: Your message of "Tue, 19 Sep 2000 11:39:50 EDT." <200009191541.LAA18323@etinc.com> 

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> 
> FYI: It seems that if you try to access the serial port on a MB with the
> port disabled, freebsd 4.1 will freeze up solid. Enabling the serial
> console will cause a lock up on boot, and any access to the port will do it
> as well.

This is probably a feature of the board/super-IO chipset in question.  

In particular, the port should never have probed successfully if the port 
was really "disabled", so you should never have been able to access it in 
the first place.

The correct solution, of course, is "don't do that".

-- 
... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also.  But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view.  [Dr. Fritz Todt]




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