From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Garrett Subject: Re: ACPI error messages Date: Thu, 3 Jun 2010 15:16:43 +0100 Message-ID: <20100603141643.GA768@srcf.ucam.org> References: <1275527406.9119.8724.camel@rzhang1-desktop> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from cavan.codon.org.uk ([93.93.128.6]:44575 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754326Ab0FCOQv (ORCPT ); Thu, 3 Jun 2010 10:16:51 -0400 Content-Disposition: inline In-Reply-To: <1275527406.9119.8724.camel@rzhang1-desktop> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Zhang Rui Cc: Alan Stern , "linux-acpi@vger.kernel.org" On Thu, Jun 03, 2010 at 09:10:06AM +0800, Zhang Rui wrote: > This is a BIOS bug to me. The code runs in this way: > > if (not Win7) > good BIOS code > else > buggy BIOS code > > This is a regression because ACPI declares it's win7 compatible in > 2.6.31. I'm afraid we can do nothing in Linux kernel to fix/workaround > it. IMO, we should ping Asus to fix it in their new BIOS release. So if you install Windows 7 on these machines, backlight control doesn't work? -- Matthew Garrett | mjg59@srcf.ucam.org