Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S968312Ab0B0NUl (ORCPT ); Sat, 27 Feb 2010 08:20:41 -0500 Received: from one.firstfloor.org ([213.235.205.2]:45004 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S968272Ab0B0NUk (ORCPT ); Sat, 27 Feb 2010 08:20:40 -0500 To: Tomasz Chmielewski Cc: "Justin P. Mattock" , Alberto Panizzo , linux-kernel@vger.kernel.org Subject: Re: core i7: hang at Booting processor 5 APIC 0x3 ip 0x6000 From: Andi Kleen References: <4B687649.5070204@wpkg.org> <4B687EFF.8000202@gmail.com> <4B687F77.5020409@wpkg.org> <4B6885FA.80509@gmail.com> <1265963139.2484.3.camel@realization> <4B751664.8060603@gmail.com> <4B891621.5070807@wpkg.org> Date: Sat, 27 Feb 2010 14:20:34 +0100 In-Reply-To: <4B891621.5070807@wpkg.org> (Tomasz Chmielewski's message of "Sat, 27 Feb 2010 13:54:57 +0100") Message-ID: <87k4tyrf19.fsf@basil.nowhere.org> User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/22.3 (gnu/linux) 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: 1153 Lines: 33 Tomasz Chmielewski writes: > Justin P. Mattock wrote: > >> but what about 2.6.33*(hot off of the press thing). > > I found a way to 100% reproduce the kernel "hang" while booting > 2.6.33. The symptoms will look like here: > > http://wpkg.org/files/i7_hang/ > > > To hang the kernel while booting, just tap repeatedly on the keyboard > as soon as the bootloader starts loading the kernel. > > The kernel hangs for me every time as I do it. > > If it matters, I use a USB keyboard (as a matter of fact, two USB > keyboards are connected as its a multiseat PC, although I tap the keys > on only one of them). Points to USB legacy BIOS code problems. FWIW i've seen the same problem occasionally too, but I can't reproduce it reliably. You could add some printks to the USB handoff code (and see if that appears around the hang (drivers/usb/host/pci-quirks.c:quirk_usb_disable_ehci) -Andi -- 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/