From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756924AbZEUWlU (ORCPT ); Thu, 21 May 2009 18:41:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754712AbZEUWlL (ORCPT ); Thu, 21 May 2009 18:41:11 -0400 Received: from mail-ew0-f176.google.com ([209.85.219.176]:44902 "EHLO mail-ew0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753083AbZEUWlK (ORCPT ); Thu, 21 May 2009 18:41:10 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; b=lxMtXX+FX3gS307NkAnLlhle6qgEB9t6+6PaRft4pjppRkdxS7Ly4+xsFVhi1s3Qy5 6OHKReLZFUbEufPsdnifN6rBMwSC47P31rHh6fCe/yOrZs/g11Xa8IxIL1ZFdxeTGqwE YzL9ntEbd6Lq94vzBS/RcTiBvvyuH7Gxi6Y3Q= Message-ID: <4A15D85C.3030708@gmail.com> Date: Fri, 22 May 2009 00:40:28 +0200 From: Niel Lambrechts User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1pre) Gecko/20090521 Shredder/3.0b3pre MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Re: BUG: blank screen - unless keyboard/synaptic combo References: <4A12FCB2.6090409@gmail.com> In-Reply-To: <4A12FCB2.6090409@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/19/2009 08:38 PM, Niel Lambrechts wrote: > I have a strange problem in that during a resume from hibernate my > text console (or X) remains blank - that is, until I simultaneously > press a keyboard key and touch the synaptic pad. It is not sufficient > to press just one or the other, it needs to be done simultaneously and > it resumes fine after doing this. I have tried quite hard to overcome this issue. All of the following hibernation tests I tried involved booting into a text console, without ever starting X. With each test I still had a blank screen upon resume, and each time it was fully recoverable by pressing any keyboard key/synaptic pad touch combo. 1. Disabling a CPU core - NO CHANGE. Based on a "multi-processor concurrency" fix mentioned on the web (Ubuntu bug #272307). 2. Upgrade BIOS to latest level - NO CHANGE. BIOS 6FET70WW, released 04/17/2009. 3. Switching to ATI Mobility Radeon HD 3650 graphics card. NO CHANGE. My Lenovo W500 has "switchable graphics" BIOS option, and I tried this test with both the integrated or the above-mentioned card without difference. _This result seems quite interesting to me, as if it could be some type of bus related freeze where the keyboard/synaptic combo plays a role._ 4. Disabling BIOS Options - NO CHANGE. Enabling/disabling security chip features + TXT features. Disabling fingerprint reader. Disabling memory security feature. 5. Kernel options - NO CHANGE. ACPI debugging - I enabled CONFIG_ACPI_DEBUG, but did not see any messages generated when I pressed a keyboard key + synaptic mousepad combo that recovers the console. FIRMWARE_EDID - still testing this. Any suggestions on anything else I could try would be most welcome...! Thanks, Niel