NetBSD Problem Report #44362

From  Sun Jan  9 17:32:16 2011
Return-Path: <>
Received: from ( [])
	by (Postfix) with ESMTP id D1EA863B89F
	for <>; Sun,  9 Jan 2011 17:32:15 +0000 (UTC)
Message-Id: <>
Date: Sun,  9 Jan 2011 17:32:14 +0000 (UTC)
Subject: USB port n reset failed
X-Send-Pr-Version: www-1.0

>Number:         44362
>Category:       kern
>Synopsis:       USB port n reset failed
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jan 09 17:35:00 +0000 2011
>Originator:     Bob Nestor
>Release:        NetBSD 5.1 (GENERIC) amd64
NetBSD 5.1 NetBSD 5.1 (GENERIC) #0: Sat Nov  6 13:19:33 UTC 2010 amd64
My monitor, keyboard and mouse are connected thru an IOgear GCS634U KVM switch.  The keyboard and mouse are USB devices.  When the KVM switch is commanded to switch devices to a different computer, NetBSD detects the USB disconnects and logs the events.  When switched back to the NetBSD system the USB sub-system usually detects the connects, logs the events and reconnects the devices.  Occasionally during a reconnect sequence the USB sub-system reports "port ? reset failed" where "?" is the port for the mouse.  At this point the mouse is unusable.  The only way to recover the NetBSD system at this point is to reboot.

The problem doesn't happen all the time, only about once in about 50 disconnect/reconnect cycles.  Moving the USB connections to a different port on the IOgear box doesn't help.  The ports on the IOgear box are known to be operational as they work with other non-NetBSD systems.
See descripion.

NetBSD Home
NetBSD PR Database Search

(Contact us) $NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
$NetBSD:,v 1.8 2006/05/07 09:23:38 tsutsui Exp $
Copyright © 1994-2007 The NetBSD Foundation, Inc. ALL RIGHTS RESERVED.