From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Jenkins Subject: Re: Patch needed for ASUS EEEPC 701 2.6.27 (perhaps a regession) Date: Sat, 11 Oct 2008 15:50:21 +0100 Message-ID: <48F0BD2D.8000001@tuffmail.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from nf-out-0910.google.com ([64.233.182.191]:16518 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753833AbYJKOu1 (ORCPT ); Sat, 11 Oct 2008 10:50:27 -0400 Received: by nf-out-0910.google.com with SMTP id d3so454194nfc.21 for ; Sat, 11 Oct 2008 07:50:25 -0700 (PDT) Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Robert Goldner Cc: linux-kernel , linux acpi , linux-stable@vger.kernel.org Robert Goldner wrote: > Hi, > > I am a happy user of an asus eeepc 701 with an self-made kernel 2.6.27. > Its working quite good, but there is one patch needed to avoid problems > related to ACPI and Hotkeys. > After using a few hotkeys there comes a message in syslog like: > ACPI: EC: GPE storm detected, disabling EC GPE > and no hotkey event is recognized any more. This is quite bad on a nettop. Hi, I reported the original bug. It is a regression, though the issue has been present for a few kernel versions now. I recommend that you avoid reproducing the problem. I now have to add "noapic" to the boot options on my EeePC, otherwise it randomly hangs / reboots when I press hotkeys - I think it damaged the hardware. BTW you can avoid reproducing the issue on buggy kernels by not pressing hotkeys quickly - and *never* holding them down; autorepeat is the main problem. Wait for the effect of the previous hotkey press to take effect (e.g. decrementing the screen brightness) before you press a hotkey again. But it is safest to just not use them. > The needed patch and the bug description is available at: > http://bugzilla.kernel.org/show_bug.cgi?id=10919 > The patch is called 'patch vs 2.6.27-rc7' > > The patch fits also to 2.6.27 without any problems and works very fine. > Thanks to everyone who was involved. > > I would suggest to include this patch in the mainline kernel very soon > (e.g. 2.6.28 or if possible in 2.6.27.1). The patch is part of Len's ACPI patch queue for the current merge window, so it should appear in 2.6.28. However it's not marked "CC: linux-stable@vger.kernel.org", so it will not be automatically included in 2.6.27.1. I think it's up to the ACPI maintainers, if they think there's a risk it might introduce other regressions. As you say, it's been tested on a range of problematic laptops, but OTOH this area has been a minefield. Maybe it needs to wait, at least until it's been in an -rc release or two. Alan