Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757431AbZDLNMV (ORCPT ); Sun, 12 Apr 2009 09:12:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753420AbZDLNMG (ORCPT ); Sun, 12 Apr 2009 09:12:06 -0400 Received: from mail-bw0-f169.google.com ([209.85.218.169]:51745 "EHLO mail-bw0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752021AbZDLNMC (ORCPT ); Sun, 12 Apr 2009 09:12:02 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=qEX8oAiNv+/Z7LNTeOocbDYh4XpyNUkzJBLk1YRRGogjzCmGxfAALZBgdAwdAaWAFG bUaZDxO727BFbKfdnzww9D+b9hDuft6+7v0h2WUYOnf/o0a53ld4HdlgSmpDnz2mOPLs rXq1hbadC2z1enJ3po+i+arWXFT04pPtOgao8= Message-ID: <49E1E89D.7040502@tuffmail.co.uk> Date: Sun, 12 Apr 2009 14:11:57 +0100 From: Alan Jenkins User-Agent: Thunderbird 2.0.0.21 (X11/20090318) MIME-Version: 1.0 To: Bjorn Helgaas CC: linux-acpi@vger.kernel.org, linux-kernel , Kernel Testers List Subject: [BISECTED] EEE PC hangs when booting off battery References: <49E065CF.6040408@tuffmail.co.uk> <66dc75180904111107q645fbb77i3cf927ffab7a7ef0@mail.gmail.com> <49E1ADAE.2030103@tuffmail.co.uk> In-Reply-To: <49E1ADAE.2030103@tuffmail.co.uk> 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 Content-Length: 2679 Lines: 82 Alan Jenkins wrote: > Tzy-Jye Daniel Lin wrote: > >> On Sat, Apr 11, 2009 at 5:41 AM, Alan Jenkins >> wrote: >> >> >>> Regression #6 on latest git! (last known good is 2.6.29-rc8) >>> >>> Magic SysRQ keys work though. Unfortunately, SysRq-W / SysRq-T generate >>> too much output, so the useful bits immediately scroll off the top of >>> the screen. I can't press SysRq-P (even if that would help), because >>> the SysRQ key on my laptop is accessed using a Fn modifier key, which >>> also turns the left hand side of the keyboard into a numeric pad. >>> >>> >> I don't own an Eee, but having played with one, the key sequence >> >> Alt down >> Fn down >> SysRq down, up >> Fn up >> P down, up >> Alt up >> >> should work just fine. As long as you keep holding Alt, you don't >> need to continue holding SysRq after the initial keypress. >> >> >> >>> Magic SysRQs on my USB keyboard generate no response. (Sometimes the >>> numlock key seems to work though. I can't tell on the laptop keyboard >>> because the laptop doesn't have a numlock led). >>> >>> >> SysRq over USB has never worked. On PC hardware, Magic SysRq depends >> on features of the built-in i8042 controller, which only handles PS/2 >> input. >> >> > Great, thanks a lot! > > I was able to run SysRq-P, and found the following backtrace - > > Pid: 0 > EIP is at acpi_idle_enter_bm+0x1df/0x208 [processor] > cpud_idle_call > cpu_idle > rest_init > start_kernel > i386_start_kernel > 7ec0a7290797f57b780f792d12f4bcc19c83aa4f is first bad commit commit 7ec0a7290797f57b780f792d12f4bcc19c83aa4f Author: Bjorn Helgaas Date: Mon Mar 30 17:48:24 2009 +0000 ACPI: processor: use .notify method instead of installing handler directly This patch adds a .notify() method. The presence of .notify() causes Linux/ACPI to manage event handlers and notify handlers on our behalf, so we don't have to install and remove them ourselves. Signed-off-by: Bjorn Helgaas CC: Zhang Rui CC: Zhao Yakui CC: Venki Pallipadi CC: Anil S Keshavamurthy Signed-off-by: Len Brown However, reverting this commit from v2.6.30-rc1 doesn't solve the hang. Alan -- 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/