From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mario Limonciello Subject: Re: [PATCH] ACPI / blacklist: blacklist Win8 OSI for Dell Inspiron 7437 Date: Wed, 20 May 2015 15:16:08 -0500 Message-ID: <555CEB88.70407@dell.com> References: <20150427174646.GA22664@srcf.ucam.org> <20150428052448.GA3458@srcf.ucam.org> <20150428171100.GA24599@srcf.ucam.org> <5554F12A.3010003@dell.com> <20150514191358.GB23853@srcf.ucam.org> <5554F4B2.8080801@dell.com> <555CC776.3030802@dell.com> <20150520184242.GA32453@srcf.ucam.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from ausc60ps301.us.dell.com ([143.166.148.206]:47010 "EHLO ausc60ps301.us.dell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752819AbbETURK (ORCPT ); Wed, 20 May 2015 16:17:10 -0400 In-Reply-To: <20150520184242.GA32453@srcf.ucam.org> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Matthew Garrett Cc: Alex Hung , Linux ACPI Mailing List On 05/20/2015 01:42 PM, Matthew Garrett wrote: > On Wed, May 20, 2015 at 12:42:14PM -0500, Mario Limonciello wrote: > >> I've gotten some more information on this. >> Windows: Asks for battery information update multiple times. >> Linux: Only asks once for battery information update. >> >> The net result is that on Linux ACPI battery is missing. In the >> _REV test BIOS workaround, a SMI event was added to ask for battery >> information update. > Hm. Why does only asking once not result in us seeing the battery? > I'm not sure, this is all I was told about the difference in behavior with Windows that prompted this bios workaround. Looking through the kernel log, i'm wondering if maybe 75646e758a0ecbed5024454507d5be5b9ea9dcbf will actually have fixed this. Alex, What was the last kernel validated on the 7*37 family? Can you see if a kernel that includes 75646e758a0ecbed5024454507d5be5b9ea9dcbf does resolve it?