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From: Mario Limonciello <mario_limonciello@dell.com>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Alex Hung <alex.hung@canonical.com>,
	Linux ACPI Mailing List <linux-acpi@vger.kernel.org>
Subject: Re: [PATCH] ACPI / blacklist: blacklist Win8 OSI for Dell Inspiron 7437
Date: Wed, 20 May 2015 12:42:14 -0500	[thread overview]
Message-ID: <555CC776.3030802@dell.com> (raw)
In-Reply-To: <5554F4B2.8080801@dell.com>

On 05/14/2015 02:17 PM, Mario Limonciello wrote:
>
> On 05/14/2015 02:13 PM, Matthew Garrett wrote:
>> On Thu, May 14, 2015 at 02:02:02PM -0500, Mario Limonciello wrote:
>>
>>> * Battery information was not displayed in the OS.  The BIOS team
>>> found that the Linux wasn't asking for battery information in the OS
>>> in the same way that Windows does.  The delta path creates a SMI
>>> event to get battery information.
>> Huh. Is there any chance we can find out what the difference is so we
>> can make them equivalent?
>>
> That was my reaction too.  I'm asking for some technical details on this.
Hi Matthew,

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.

Thanks,

  reply	other threads:[~2015-05-20 17:42 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-23  3:24 [PATCH] ACPI / blacklist: blacklist Win8 OSI for Dell Inspiron 7437 Alex Hung
2015-04-24  8:21 ` Matthew Garrett
2015-04-27  8:30   ` Alex Hung
2015-04-27 17:46     ` Matthew Garrett
2015-04-28  4:53       ` Alex Hung
2015-04-28  5:24         ` Matthew Garrett
2015-04-28  9:51           ` Alex Hung
2015-04-28 17:11             ` Matthew Garrett
2015-04-29 10:09               ` Alex Hung
2015-05-14 19:02                 ` Mario Limonciello
2015-05-14 19:13                   ` Matthew Garrett
2015-05-14 19:17                     ` Mario Limonciello
2015-05-20 17:42                       ` Mario Limonciello [this message]
2015-05-20 18:42                         ` Matthew Garrett
2015-05-20 20:16                           ` Mario Limonciello
2015-06-02  3:20                             ` Alex Hung

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