From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Grover Subject: Re: [ibm-acpi-devel] TP Edge E220s freezes when hotkeys pressed Date: Wed, 11 May 2011 09:42:08 -0700 Message-ID: <4DCABC60.9000103@redhat.com> References: <4DC97328.9090200@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mx1.redhat.com ([209.132.183.28]:26457 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753558Ab1EKR1w (ORCPT ); Wed, 11 May 2011 13:27:52 -0400 In-Reply-To: <4DC97328.9090200@redhat.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: ibm-acpi-devel@lists.sourceforge.net Cc: linux-acpi@vger.kernel.org On 05/10/2011 10:17 AM, Andy Grover wrote: > I just got an Edge e220s, and am having some issues. If I press Fn-F7 > (lower screen brightness) two times or Fn-F8 (increase brightness) the > laptop freezes up solid. I get an unhandled HKEY 0x6050 message from > Fn-F7 the first time I press it, but I'm not thinking thinkpad_acpi is > the culprit, since the behavior is the same (2nd F7, 1st F8 freezes > laptop) even without the module loaded. > > Do you have any advice or insight into this issue, or how to diagnose > the cause of this issue? [ccing linux-acpi too] Self-replying.. Apparently the hang is ACPI-related, it only happens when using ACPI backlight controls. It works if acpi=off, but that's not really a good solution these days. I think this means I'm out of luck without a BIOS update -- the backlight ASL (avail on request) ends up calling a "SMI" method, so the trail ends there. I also found out that blacklisting the video module doesn't work, perhaps because i915 depends on it? Another weird thing is that acpi_backlight=vendor causes it to hang, right before gdm screen comes up, so that's not an option either, alas. Cmon Lenovo bios people, I thought you had a clue! Regards -- Andy