From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261247AbVGLHzD (ORCPT ); Tue, 12 Jul 2005 03:55:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261245AbVGLHzD (ORCPT ); Tue, 12 Jul 2005 03:55:03 -0400 Received: from totor.bouissou.net ([82.67.27.165]:52379 "EHLO totor.bouissou.net") by vger.kernel.org with ESMTP id S261246AbVGLHzB (ORCPT ); Tue, 12 Jul 2005 03:55:01 -0400 From: Michel Bouissou Organization: Me, Myself and I To: Alan Stern Subject: Re: Kernel 2.6.12 + IO-APIC + uhci_hcd = Trouble Date: Tue, 12 Jul 2005 09:54:59 +0200 User-Agent: KMail/1.7.2 Cc: "Protasevich, Natalie" , linux-kernel@vger.kernel.org References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Content-Disposition: inline Message-Id: <200507120954.59522@totor.bouissou.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Le Mardi 12 Juillet 2005 03:54, Alan Stern a écrit : > > So the problem is circled to 2.6 kernel, uhci_hcd and UP IO-APIC. > > Don't rule out the hardware too quickly.  2.4 and 2.6 manage the UHCI > controllers in different ways. I saw ;-) > In particular, the usb-uhci driver in 2.4 does not suspend the controller > when no devices are attached, whereas uhci-hcd in 2.6 does.  (So does the > "alternate" uhci driver in 2.4.)  [...] > To try and help pin things down, tomorrow (i.e., Tuesday) I'll send you a > test patch to completely disable the UHCI controllers, leaving them awake > and idle, not generating interrupts.  If you still get those spurious > IRQs, they will have to come from somewhere else.  (Assuming you can > devote server time to this sort of testing...) I'll try my best, although I will have little time for playing with this until the end of this week, and will be on travel next week. But if you send me a test patch, I'll try my best to test it. Cheers. -- Michel Bouissou OpenPGP ID 0xDDE8AC6E