From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756565Ab1GAN3o (ORCPT ); Fri, 1 Jul 2011 09:29:44 -0400 Received: from cantor2.suse.de ([195.135.220.15]:59435 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755554Ab1GAN3m (ORCPT ); Fri, 1 Jul 2011 09:29:42 -0400 Date: Fri, 1 Jul 2011 06:29:19 -0700 From: Greg KH To: =?iso-8859-1?Q?=C9ric?= Piel Cc: Alan Stern , LKML , linux-usb@vger.kernel.org, "Rafael J. Wysocki" Subject: Re: Regression 3.0-rc5+ : khubd blocked Message-ID: <20110701132919.GB8902@suse.de> References: <4E0DC172.9010504@tudelft.nl> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <4E0DC172.9010504@tudelft.nl> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 01, 2011 at 02:45:38PM +0200, Éric Piel wrote: > Hello, > I've come across to what looks like a regression in the kernel a > few commits after 3.0-rc5. > > When I turn off a usb hub, to which my mouse and keyboard are connected, > and then turn it on again, they are not detected again. After unplugging > it and waiting a few minutes I get a "task khubd:621 blocked for more > than 120 seconds." > > I haven't investigated much. It seems reproducible here on my x86_64 > laptop. It doesn't seem to happen on a 3.0-rc4. Maybe important, my > kernel already has commit 2e34b429a404675dc4fc4ad2ee339eea028da3ca > "Merge branch 'usb-linus' of > git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6" > > Let me know if you need me to investigate more, or maybe there is > already a fix for that bug? Can you run 'git bisect' to track it down to the exact patch that causes the problem? thanks, greg k-h