linux-kernel - Re: [PATCH] platform/x86: thinkpad_acpi: disable bluetooth for some machines

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Date:   Fri, 8 Mar 2019 09:14:24 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     Mario.Limonciello@...l.com, ibm-acpi@....eng.br
Cc:     dvhart@...radead.org, andy@...radead.org,
        ibm-acpi-devel@...ts.sourceforge.net,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] platform/x86: thinkpad_acpi: disable bluetooth for some
 machines


在 2019/3/8 上午7:14, Mario.Limonciello@...l.com 写道:
>   -----Original Message-----
>> From: platform-driver-x86-owner@...r.kernel.org <platform-driver-x86-
>> owner@...r.kernel.org> On Behalf Of Jiaxun Yang
>> Sent: Thursday, March 7, 2019 2:08 AM
>> To: ibm-acpi@....eng.br
>> Cc: dvhart@...radead.org; andy@...radead.org; ibm-acpi-
>> devel@...ts.sourceforge.net; platform-driver-x86@...r.kernel.org; linux-
>> kernel@...r.kernel.org; stable@...r.kernel.org; Jiaxun Yang
>> Subject: [PATCH] platform/x86: thinkpad_acpi: disable bluetooth for some
>> machines
>>
>>
>> [EXTERNAL EMAIL]
>>
>> Some AMD based ThinkPads have a firmware bug that calling
>> "GBDC" will cause bluetooth on Intel wireless cards blocked.

Hi,

Thanks for your suggestions.

> Since this is considered a firmware bug; has the OEM (and IBV) been notified?  Is it
> fixed in a newer version of the firmware?
No. I've noticed them about the bug but they said these models have no 
official Linux support so no plan to fix.
> If so, then this should probably only match particular broken firmware versions.
Disable bluetooth subdriver on these models should be safe since Intel 
cards have built-in RFKill and there is no bluetooth hotkey on these 
machines.
>> Probe these models by DMI match and disable bluetooth subdriver
>> if specified Intel wireless card exist.
>>
>> Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
>> ---

--

Jiaxun Yang