From c2fae871699d453a8022c8e86a90d3e8d84f150e Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Mon, 24 Mar 2003 15:56:00 +0000
Subject: [PATCH] Don't call sysbeep() in sc_bell() if either duration or pitch
 is zero. Otherwise sysbeep() makes an annoying clicking sound on some
 systems. 'kbdcontrol -b off' just sets the duration and pitch to zero, it
 doesn't set the QUIET_BELL flag.

Tested by:	SorAlx <soralx@cydem.zp.ua>
PR:		misc/41772
MFC after:	1 week
---
 sys/dev/syscons/syscons.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/syscons/syscons.c b/sys/dev/syscons/syscons.c
index b6b8e6b0f2e..88c59e8b626 100644
--- a/sys/dev/syscons/syscons.c
+++ b/sys/dev/syscons/syscons.c
@@ -3547,7 +3547,7 @@ sc_bell(scr_stat *scp, int pitch, int duration)
 	if (scp != scp->sc->cur_scp)
 	    scp->sc->blink_in_progress += 2;
 	blink_screen(scp->sc->cur_scp);
-    } else {
+    } else if (duration != 0 && pitch != 0) {
 	if (scp != scp->sc->cur_scp)
 	    pitch *= 2;
 	sysbeep(pitch, duration);