From owner-freebsd-stable@FreeBSD.ORG Mon Sep 29 20:05:20 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 525911065688 for ; Mon, 29 Sep 2008 20:05:20 +0000 (UTC) (envelope-from ronald-freebsd8@klop.yi.org) Received: from smtp-out0.tiscali.nl (smtp-out0.tiscali.nl [195.241.79.175]) by mx1.freebsd.org (Postfix) with ESMTP id 0B3B98FC21 for ; Mon, 29 Sep 2008 20:05:19 +0000 (UTC) (envelope-from ronald-freebsd8@klop.yi.org) Received: from [212.123.145.58] (helo=guido.klop.ws) by smtp-out0.tiscali.nl with smtp id 1KkOze-0001GT-D7 for ; Mon, 29 Sep 2008 22:05:18 +0200 Received: (qmail 21861 invoked from network); 29 Sep 2008 20:05:03 -0000 Received: from localhost (HELO 82-170-177-25.ip.telfort.nl) (127.0.0.1) by localhost with SMTP; 29 Sep 2008 20:05:03 -0000 Date: Mon, 29 Sep 2008 22:05:02 +0200 To: "Bruce M Simpson" , "FreeBSD stable" From: "Ronald Klop" Content-Type: text/plain; format=flowed; delsp=yes; charset=us-ascii MIME-Version: 1.0 References: <48E02557.2020303@incunabulum.net> Content-Transfer-Encoding: 7bit Message-ID: In-Reply-To: <48E02557.2020303@incunabulum.net> User-Agent: Opera Mail/9.52 (FreeBSD) Cc: Subject: Re: USB detach/attach hangs with 7.0-RELEASE and 7.1-PRERELEASE X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Sep 2008 20:05:20 -0000 On Mon, 29 Sep 2008 02:46:15 +0200, Bruce M Simpson wrote: > Hi, > > I've noticed some general instability with plugging in or removing USB > devices with FreeBSD 7.x, even when the devices are not actively in use. > > I had this happen with umass and ucom devices 3 times today. The machine > hangs solid, there are no obvious signs of a panic or trap to DDB. I > can't provide backtraces unfortunately -- these hangs happen on both my > laptop and desktop, and I usually have X running -- if I had more > specific information, I'd open a PR. > > Again, there seems to be no reason why this should happen, the devices > are off-the-shelf consumer items known to work with existing drivers, > and have been repeatedly used in other OSes without these hangs > happening; consider this an "anecdotal report". > > [For some reason my IBM laptop will often not allow me to break into DDB > on a driver related panic, and will just immediately reboot -- I lack > free time to track down exactly why this could be. > My desktop has a USB keyboard and this appears not to be supported by > DDB, I ordered a PS/2 keyboard which hasn't arrived, but that's another > story.] > > thanks > BMS On my computer I had to disable USB support in the BIOS because it 'conflicted' with USB support of FreeBSD. FreeBSD still detects USB and all connected devices. Maybe this helps on your computer also. Ronald.