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Date: Mon, 9 Mar 2009 20:25:36 +0100
From: Ed Schouten <ed@80386.nl>
To: pluknet <pluknet@gmail.com>
Message-ID: <20090309192536.GY19161@hoeg.nl>
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Cc: FreeBSD Current <freebsd-current@freebsd.org>
Subject: Re: panic: mutex Giant not owned at
	/usr/src/sys/kern/tty_ttydisc.c:1127
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Hi,

Can you try the attached patch? Let me know if it fixes the issue you're
having. The reason why we're seeing such panics lately, is because the
new TTY layer has one big improvement: it has assertions. This means
that there are a lot of bugs in the old code where we call into the TTY
layer without holding locks. Ugh. :-)

--=20
 Ed Schouten <ed@80386.nl>
 WWW: http://80386.nl/

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Index: syscons.c
===================================================================
--- syscons.c	(revision 189489)
+++ syscons.c	(working copy)
@@ -3277,7 +3277,7 @@
 			    sc_draw_cursor_image(scp);
 			}
 			tp = SC_DEV(sc, scp->index);
-			if (tty_opened(tp))
+			if (!kdb_active && tty_opened(tp))
 			    sctty_outwakeup(tp);
 #endif
 		    }

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