Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754153AbYJCSIg (ORCPT ); Fri, 3 Oct 2008 14:08:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752933AbYJCSI1 (ORCPT ); Fri, 3 Oct 2008 14:08:27 -0400 Received: from www.sr71.net ([198.145.64.142]:47050 "EHLO blackbird.sr71.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751659AbYJCSI0 (ORCPT ); Fri, 3 Oct 2008 14:08:26 -0400 X-Greylist: delayed 1362 seconds by postgrey-1.27 at vger.kernel.org; Fri, 03 Oct 2008 14:08:26 EDT Subject: USB disconnects every 30 seconds (2.6.27-rc8) From: Dave Hansen To: gregkh Cc: "linux-kernel@vger.kernel.org" , linux-usb@vger.kernel.org Content-Type: text/plain Date: Fri, 03 Oct 2008 10:45:39 -0700 Message-Id: <1223055939.7944.32.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: 1850 Lines: 44 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. 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, I don't seem to notice the disconnects. $ dmesg | grep disconnect [ 3599.496217] usb 3-4.4.4: USB disconnect, address 122 [ 3599.677346] usb 3-4.1: USB disconnect, address 121 [ 3627.804621] usb 3-4.1: USB disconnect, address 124 [ 3628.004400] usb 3-4.4.4: USB disconnect, address 123 [ 3659.496421] usb 3-4.4.4: USB disconnect, address 126 [ 3659.676186] usb 3-4.1: USB disconnect, address 125 [ 3689.493763] usb 3-4.1: USB disconnect, address 3 [ 3689.708916] usb 3-4.4.4: USB disconnect, address 127 [ 3719.497221] usb 3-4.4.4: USB disconnect, address 7 [ 3719.684965] usb 3-4.1: USB disconnect, address 6 [ 3749.496323] usb 3-4.1: USB disconnect, address 9 [ 3749.691180] usb 3-4.4.4: USB disconnect, address 8 Full dmesg and .config: http://sr71.net/~dave/linux/config-10-03-2008.1.txt http://sr71.net/~dave/linux/dmesg-10-03-2008.1.log The last one I tried before this was -rc3, and it appears to be OK. The Ubuntu 2.6.24-19-generic kernel also appears not to have this issue. A quick scan of LKML and linux-usb didn't turn up anything similar. 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. -- 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/