Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761608AbZJJB4u (ORCPT ); Fri, 9 Oct 2009 21:56:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759112AbZJJB4u (ORCPT ); Fri, 9 Oct 2009 21:56:50 -0400 Received: from netrider.rowland.org ([192.131.102.5]:35315 "HELO netrider.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1757951AbZJJB4t (ORCPT ); Fri, 9 Oct 2009 21:56:49 -0400 Date: Fri, 9 Oct 2009 21:56:08 -0400 (EDT) From: Alan Stern X-X-Sender: stern@netrider.rowland.org To: Benjamin Herrenschmidt cc: Greg KH , "linux-kernel@vger.kernel.org" , "linux-usb@vger.kernel.org" , Hugh Blemings , "Rafael J. Wysocki" Subject: Re: USB serial regression 2.6.31.1 -> 2.6.31.2 (and 2.6.32-rc3) In-Reply-To: <1255134753.2219.3.camel@pasglop> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3725 Lines: 56 On Sat, 10 Oct 2009, Benjamin Herrenschmidt wrote: > (Adding Rafael) > > On Sat, 2009-10-10 at 11:31 +1100, Benjamin Herrenschmidt wrote: > > On Sat, 2009-10-10 at 11:25 +1100, Benjamin Herrenschmidt wrote: > > > Hi folks ! > > > > > > My USB GSM modem (Huawei 169, pretty common stuff) stopped working in > > > the latest ubuntu karmic update. So far, I tracked it down to a > > > regression that happened in the stable releases between 2.6.31.1 and > > > 2.6.31.2 (still present in .3). I haven't tested 2.6.32-rc* yet and > > > haven't had a chance to bisect (need to make myself a trimmed > > > down .config first). > > > > 2.6.32-rc3 is also busted with a different log output: > > > > Oct 10 11:27:36 pasglop kernel: [ 34.480060] usb 4-1: new full speed USB device using uhci_hcd and address 2 > > Oct 10 11:27:36 pasglop kernel: [ 34.645057] usb 4-1: configuration #1 chosen from 1 choice > > Oct 10 11:27:36 pasglop kernel: [ 34.658115] Initializing USB Mass Storage driver... > > Oct 10 11:27:36 pasglop kernel: [ 34.660006] scsi2 : SCSI emulation for USB Mass Storage devices > > Oct 10 11:27:36 pasglop kernel: [ 34.660290] usbcore: registered new interface driver usb-storage > > Oct 10 11:27:36 pasglop kernel: [ 34.660294] USB Mass Storage support registered. > > Oct 10 11:27:36 pasglop kernel: [ 34.661566] usb-storage: device found at 2 > > Oct 10 11:27:36 pasglop kernel: [ 34.661568] usb-storage: waiting for device to settle before scanning > > Oct 10 11:27:36 pasglop kernel: [ 35.100131] usb 4-1: USB disconnect, address 2 > > Oct 10 11:27:36 pasglop kernel: [ 35.345076] usb 4-1: new full speed USB device using uhci_hcd and address 3 > > Oct 10 11:27:41 pasglop kernel: [ 35.503633] usb 4-1: configuration #1 chosen from 1 choice > > Oct 10 11:27:41 pasglop kernel: [ 35.515533] scsi6 : SCSI emulation for USB Mass Storage devices > > Oct 10 11:27:41 pasglop kernel: [ 35.516567] usb-storage: device found at 3 > > Oct 10 11:27:41 pasglop kernel: [ 35.516569] usb-storage: waiting for device to settle before scanning > > Oct 10 11:27:41 pasglop kernel: [ 40.518055] usb-storage: device scan complete > > Oct 10 11:27:41 pasglop kernel: [ 40.521051] scsi 6:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 > > Oct 10 11:27:41 pasglop kernel: [ 40.524065] scsi 6:0:0:1: Direct-Access HUAWEI SD Storage 2.31 PQ: 0 ANSI: 2 > > Oct 10 11:27:41 pasglop kernel: [ 40.546018] sr1: scsi-1 drive > > Oct 10 11:27:43 pasglop kernel: [ 40.547167] sr 6:0:0:0: Attached scsi CD-ROM sr1 > > Oct 10 11:27:43 pasglop kernel: [ 40.548872] sr 6:0:0:0: Attached scsi generic sg2 type 5 > > Oct 10 11:27:43 pasglop kernel: [ 40.549178] sd 6:0:0:1: Attached scsi generic sg3 type 0 > > Oct 10 11:27:43 pasglop kernel: [ 40.681084] usb 4-1: reset full speed USB device using uhci_hcd and address 3 > > Oct 10 11:27:43 pasglop kernel: [ 40.960039] usb 4-1: reset full speed USB device using uhci_hcd and address 3 > > Oct 10 11:27:43 pasglop kernel: [ 41.233071] usb 4-1: reset full speed USB device using uhci_hcd and address 3 > > Oct 10 11:27:43 pasglop kernel: [ 41.509066] usb 4-1: reset full speed USB device using uhci_hcd and address 3 ... > > At the end, I think I yanked it out. This looks a lot like a hardware problem, such as bad USB cables. Could you collect a usbmon trace for bus 4? It ought to show whether this is the case or whether software is at fault. Alan Stern -- 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/