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From: "Aaron Wohl" <freebsd@soith.com>
To: "Scott Long" <scottl@freebsd.org>,
	"Nicole" <nicole@daemontech.com>
Date: Mon, 01 Sep 2003 18:52:51 -0600
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cc: current@freebsd.org
cc: "Scott M. Likens" <damm@fpsn.net>
Subject: Re: Question related to FreeBSD Serial Console...
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If you do try a USB keyboard be sure and test reboot -d (make a kernel
core).  On the intel servers I have reboot -d (or any panic) causes the
kernel to lockup forever.  In the routine where it writes out kernel
dumps it pools for a control-c hit on the console that routine (poll for
a char) turns out to block on USB keyboards during shutdown, I suspect
too much of the user level USB code has been turned off by then.

I ended up turning off the kernel (5.1) USB support, not running the usb
deamon and removing moused.  To save on USB related kernel crashes.