Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753229AbYJCTIV (ORCPT ); Fri, 3 Oct 2008 15:08:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750951AbYJCTIL (ORCPT ); Fri, 3 Oct 2008 15:08:11 -0400 Received: from www.sr71.net ([198.145.64.142]:54997 "EHLO blackbird.sr71.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750718AbYJCTIK (ORCPT ); Fri, 3 Oct 2008 15:08:10 -0400 Subject: Re: USB disconnects every 30 seconds (2.6.27-rc8) From: Dave Hansen To: Alan Stern Cc: gregkh , "linux-kernel@vger.kernel.org" , linux-usb@vger.kernel.org In-Reply-To: References: Content-Type: text/plain Date: Fri, 03 Oct 2008 12:08:06 -0700 Message-Id: <1223060886.7944.55.camel@nimitz> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5360 Lines: 97 On Fri, 2008-10-03 at 14:40 -0400, Alan Stern wrote: > On Fri, 3 Oct 2008, Dave Hansen wrote: > > I'm seeing some odd USB behavior with newer kernels > > (2.6.27-rc8-00062-g330f647 to be exact). Almost exactly, every 30 > > seconds, one of my USB hubs disconnects. > > Actually two of the hubs disconnect: 3-4.1 and 3-4.4.4. Neither is > beneath the other. Yeah, it's a "7-port hub". I assume that means that it's a pair of 4-porters plugged together somehow. It is this exact model: http://store.pchcables.com/usb7posepohu.html > > At first, I thought it was a > > hardware issue, and started swapping cables. Then, I realized that I'd > > *just* rebooted into a new kernel. So, I booted back to the distro > > kernel and these went away. > > > > Even though my mouse is hanging off that hub, > > No it isn't. The mouse is 3-4.4.1, which is not below either 3-4.1 or > 3-4.4.4. Huh, that's odd. The T61 has two (empty) USB ports on the left, one on the right, and 4 on the dock. The configuration I've had so far is the 7-port hub plugged into one of the four ports on the back of the T61. > > The machine is a Lenovo T61 plugged into the Lenovo dock. At this > > point, the only thing plugged into the suspect hub is my mouse. > > In fact, nothing is plugged into either of the hubs. > > In theory this could be caused by a problem in the dock. But it would > be better to get more information before trying to pin down the cause. > > You should use usbmon (see Documentation/usb/usbmon.txt) to record a > trace of everything happening on bus 3. And to keep things simple, you > should unplug all the USB devices except for one of the magical > disappearing hubs. Unfortunately, the disconnects don't happen unless both my 7-port hub and the mouse are connected. So, I've disconnected everything but those two things. I also plugged the mouse into the single port on the right side of the T61 instead of the dock. usbmon output: http://sr71.net/~dave/linux/1.mon.out I've also attached appended the corresponding dmesg with annotations of what I did when. plug in mouse: Oct 3 11:53:51 nimitz kernel: [ 8253.306987] usb 2-1: new low speed USB device using uhci_hcd and address 4 Oct 3 11:53:51 nimitz kernel: [ 8253.420284] usb 2-1: configuration #1 chosen from 1 choice Oct 3 11:53:52 nimitz kernel: [ 8253.476663] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1a.1/usb2/2-1/2-1:1.0/input/input13 Oct 3 11:53:52 nimitz kernel: [ 8253.493970] input: USB HID v1.10 Mouse [Logitech USB Receiver] on usb-0000:00:1a.1-1 plug in '7 port' hub: Oct 3 11:54:26 nimitz kernel: [ 8288.132987] usb 3-4.3: new high speed USB device using ehci_hcd and address 47 Oct 3 11:54:26 nimitz kernel: [ 8288.188960] usb 3-4.3: configuration #1 chosen from 1 choice Oct 3 11:54:26 nimitz kernel: [ 8288.189371] hub 3-4.3:1.0: USB hub found Oct 3 11:54:26 nimitz kernel: [ 8288.189669] hub 3-4.3:1.0: 4 ports detected Oct 3 11:54:26 nimitz kernel: [ 8288.339300] usb 3-4.3.4: new high speed USB device using ehci_hcd and address 48 Oct 3 11:54:26 nimitz kernel: [ 8288.395323] usb 3-4.3.4: configuration #1 chosen from 1 choice Oct 3 11:54:26 nimitz kernel: [ 8288.395611] hub 3-4.3.4:1.0: USB hub found Oct 3 11:54:26 nimitz kernel: [ 8288.395928] hub 3-4.3.4:1.0: 4 ports detected 'hub disconnects:' (I didn't do anything physically here) Oct 3 11:54:52 nimitz kernel: [ 8313.567487] usb 3-4.3: USB disconnect, address 47 Oct 3 11:54:52 nimitz kernel: [ 8313.567492] usb 3-4.3.4: USB disconnect, address 48 Oct 3 11:54:52 nimitz kernel: [ 8313.619115] usb 3-4.3: new high speed USB device using ehci_hcd and address 49 Oct 3 11:54:52 nimitz kernel: [ 8313.675618] usb 3-4.3: configuration #1 chosen from 1 choice Oct 3 11:54:52 nimitz kernel: [ 8313.675887] hub 3-4.3:1.0: USB hub found Oct 3 11:54:52 nimitz kernel: [ 8313.676232] hub 3-4.3:1.0: 4 ports detected Oct 3 11:54:52 nimitz kernel: [ 8313.823367] usb 3-4.3.4: new high speed USB device using ehci_hcd and address 50 Oct 3 11:54:52 nimitz kernel: [ 8313.880913] usb 3-4.3.4: configuration #1 chosen from 1 choice Oct 3 11:54:52 nimitz kernel: [ 8313.881140] hub 3-4.3.4:1.0: USB hub found Oct 3 11:54:52 nimitz kernel: [ 8313.881485] hub 3-4.3.4:1.0: 4 ports detected Oct 3 11:55:22 nimitz kernel: [ 8343.572344] usb 3-4.3: USB disconnect, address 49 Oct 3 11:55:22 nimitz kernel: [ 8343.572355] usb 3-4.3.4: USB disconnect, address 50 Oct 3 11:55:22 nimitz kernel: [ 8343.695579] usb 3-4.3: new high speed USB device using ehci_hcd and address 51 Oct 3 11:55:22 nimitz kernel: [ 8343.754283] usb 3-4.3: configuration #1 chosen from 1 choice Oct 3 11:55:22 nimitz kernel: [ 8343.754598] hub 3-4.3:1.0: USB hub found Oct 3 11:55:22 nimitz kernel: [ 8343.754923] hub 3-4.3:1.0: 4 ports detected Oct 3 11:55:22 nimitz kernel: [ 8343.908841] usb 3-4.3.4: new high speed USB device using ehci_hcd and address 52 Oct 3 11:55:22 nimitz kernel: [ 8343.964966] usb 3-4.3.4: configuration #1 chosen from 1 choice Oct 3 11:55:22 nimitz kernel: [ 8343.965247] hub 3-4.3.4:1.0: USB hub found -- Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/