Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756440Ab0DNSXo (ORCPT ); Wed, 14 Apr 2010 14:23:44 -0400 Received: from iolanthe.rowland.org ([192.131.102.54]:39233 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1756227Ab0DNSXn (ORCPT ); Wed, 14 Apr 2010 14:23:43 -0400 Date: Wed, 14 Apr 2010 14:23:40 -0400 (EDT) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: Pedro Ribeiro cc: Daniel Mack , USB list , Andi Kleen , Kernel development list , Andrew Morton , Greg KH Subject: Re: USB transfer_buffer allocations on 64bit systems In-Reply-To: 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: 820 Lines: 19 On Wed, 14 Apr 2010, Pedro Ribeiro wrote: > The best way to trigger the issue is to connect a dib0700 based DVB > adapter. All you need is to connect it. Since it polls for the remote > control every 50 msec, it causes a constant interference. Beware that > on 2.6.34 this behaviour has been corrected. Other DVB adapters may > trigger the same issue if they also poll constatly for the rc. Your computer has two EHCI controllers, doesn't it? Can you plug the DVB into a different USB bus from the audio device? If you do, does the interference still occur? 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/