Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1162327AbaDCGaz (ORCPT ); Thu, 3 Apr 2014 02:30:55 -0400 Received: from mga09.intel.com ([134.134.136.24]:32805 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161716AbaDCGax (ORCPT ); Thu, 3 Apr 2014 02:30:53 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,784,1389772800"; d="scan'208";a="513885013" Message-ID: <533D001A.5030802@linux.intel.com> Date: Thu, 03 Apr 2014 14:30:50 +0800 From: "Li, Aubrey" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Steven Rostedt , Ingo Molnar , Linus Torvalds , LKML , "H. Peter Anvin" , Thomas Gleixner , Matthew Garrett Subject: Re: FW: [BUG] x86: reboot doesn't reboot References: <20140403021411.6236996f@gandalf.local.home> <070BEF4AC20468458C22969097656CD91163106C@shsmsx102.ccr.corp.intel.com> In-Reply-To: <070BEF4AC20468458C22969097656CD91163106C@shsmsx102.ccr.corp.intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > From: Steven Rostedt [mailto:rostedt@goodmis.org] > Sent: Thursday, April 03, 2014 2:14 PM > To: Linus Torvalds; LKML > Cc: Ingo Molnar; H. Peter Anvin; Thomas Gleixner; Li, Aubrey; Matthew Garrett > Subject: [BUG] x86: reboot doesn't reboot > > I noticed that one of my test boxes no longer does a reboot with the latest > kernel. It goes down and shows: > > [ 51.589896] reboot: Restarting system > [ 51.593567] reboot: machine restart > > > And the system sounds like it turns off (the fans stop), but then I just sit there > and wait, and wait and wait. The system never starts up again. > > I did a bisect and it landed on: a4f1987e4c54 "x86, reboot: Add EFI and > CF9 reboot methods into the default list" which looks like a very likely suspect. I > removed that and fb3bd7b19b2b, as the second commit was just a fix up of the > first, recompiled, installed and rebooted to that kernel. I tried to reboot again > and sure enough after posting the "machine restart" I started getting those > "Press any key to continue." > messages again. That's a good sign. > > Linus mentioned to me to use "reboot=pci" on the kernel command line, but no > dice. That doesn't seem to make a difference. May I know if "reboot=t" make any difference on your system with the change? Thanks, -Aubrey -- 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/