From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751788Ab0JMQIb (ORCPT ); Wed, 13 Oct 2010 12:08:31 -0400 Received: from 92.236.191.90.dyn.estpak.ee ([90.191.236.92]:50975 "EHLO x41" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750963Ab0JMQIa (ORCPT ); Wed, 13 Oct 2010 12:08:30 -0400 X-Greylist: delayed 438 seconds by postgrey-1.27 at vger.kernel.org; Wed, 13 Oct 2010 12:08:29 EDT Subject: BUG: USB3.0 =?ISO-8859-1?Q?=B5PD720200?= complains about over-current From: =?ISO-8859-1?Q?T=F5nu?= Samuel To: linux-kernel Cc: tonu@jes.ee Content-Type: text/plain; charset="UTF-8" Date: Wed, 13 Oct 2010 19:01:09 +0300 Message-ID: <1286985669.4853.14.camel@x41.itrotid.ee> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! I know, this is place where only Gods speak and others not. But I am sure there is something odd I found and someone here can take care of it. In situation when nothing is connected to any USB ports Ubuntu 10.04.1 stock kernel complains: spider@spider:~$ zcat /var/log/kern.log.2.gz | grep -i current | head Sep 29 23:30:12 spider kernel: [ 9.048388] hub 8-0:1.0: over-current change on port 1 Sep 29 23:30:12 spider kernel: [ 9.152036] hub 8-0:1.0: over-current change on port 2 Sep 29 23:30:12 spider kernel: [ 9.256038] hub 8-0:1.0: over-current change on port 3 Sep 29 23:30:12 spider kernel: [ 9.360037] hub 8-0:1.0: over-current change on port 1 Sep 29 23:30:12 spider kernel: [ 9.464036] hub 8-0:1.0: over-current change on port 2 Sep 29 23:30:12 spider kernel: [ 9.570621] hub 8-0:1.0: over-current change on port 3 Sep 29 23:30:12 spider kernel: [ 9.672037] hub 8-0:1.0: over-current change on port 1 Sep 29 23:30:12 spider kernel: [ 9.776038] hub 8-0:1.0: over-current change on port 2 Sep 29 23:30:12 spider kernel: [ 9.880049] hub 8-0:1.0: over-current change on port 3 Sep 29 23:30:13 spider kernel: [ 9.984041] hub 8-0:1.0: over-current change on port 1 spider@spider:~$ This runs forever and makes computer busy forever just running those messages. I verified same behavior exists with vanilla 2.6.35.7. Disabling USB3.0 in BIOS turns off problem and all USB2 ports remain to work. So probably this is xHCI driver who complains. I looked bit around in source and see it is copied from USB2 code and possibly USB3 has something different. I've read USB3 can supply more power, so possibly something here has changed. My hardware: Motherboard ASUS M4A88T-I Deluxe http://www.asus.com/product.aspx?P_ID=jGAoIFEziW5sPYy7 it has USB3 chip "NEC D720200F1" on it: http://digi.physic.ut.ee/mw/images/d/de/20100926_digi_007.png NEC is joined Renesas, so this is his link for datasheet etc: http://www2.renesas.com/usb/en/product/upd720200.html If you propose patch, I can give him test run. Tõnu