From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Jenkins Subject: [BISECTED] EEE PC hangs when booting off battery Date: Sun, 12 Apr 2009 14:11:57 +0100 Message-ID: <49E1E89D.7040502@tuffmail.co.uk> References: <49E065CF.6040408@tuffmail.co.uk> <66dc75180904111107q645fbb77i3cf927ffab7a7ef0@mail.gmail.com> <49E1ADAE.2030103@tuffmail.co.uk> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:received:received:sender:message-id:date:from :user-agent:mime-version:to:cc:subject:references:in-reply-to :content-type:content-transfer-encoding; bh=fMgMX9cIh+tZfTIs6E6JNl7R3BIonEb3oH8DIRIEuVA=; b=mVEG21g7cb2R02LXX8TIJWV4RNkTUOixZg9yrz+fsqeF6lIVC2zMyMI+1oyXOe3vk1 WSai/eyK5IQIxtKDQf/wlSor3vIpOv0eGgtXpcgFpJn2QzqXOqmSV6l+ZEaIjt/nCCET IGUlURTCcBy5ZRoPX9SDlcIpb+js3OaTnMe+I= In-Reply-To: <49E1ADAE.2030103-cCz0Lq7MMjm9FHfhHBbuYA@public.gmane.org> Sender: kernel-testers-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii" To: Bjorn Helgaas Cc: linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel , Kernel Testers List 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