From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gabriele Mazzotta <gabriele.mzt@gmail.com>
Subject: Re: [Bug 106031] Regression in 4.2.x: in airplane mode each time I
 open my laptop lid
Date: Thu, 22 Oct 2015 12:54:33 +0200
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Cc: Darren Hart <dvhart@infradead.org>, "platform-driver-x86@vger.kernel.org" <platform-driver-x86@vger.kernel.org>, Alex Hung <alex.hung@canonical.com>

On 22/10/2015 12:50, Pali Roh=C3=A1r wrote:
> On Thursday 22 October 2015 12:44:08 Gabriele Mazzotta wrote:
>> On 22/10/2015 10:51, Pali Roh=C3=A1r wrote:
>>> On Thursday 22 October 2015 10:26:47 Gabriele Mazzotta wrote:
>>>> I'll see if I can find a batter way to deal with this problem,
>>>> dell-laptop can detect the presence of an hardware switch.
>>>
>>> dell-rbtn.ko has acpi method CRBT which returns if notebook has hw =
switch or
>>> toggle key.
>>>
>>> And rfkill implementation in dell-laptop.ko does not work correctly=
 on
>>> XPS machines. And because userspace implementation of smbios works =
fine,
>>> I think that problem is in kernel driver rather in BIOS/firmware...
>>
>> I was thinking about something such as the following, which should f=
avor
>> the hardware slider when available. This should work if my assumptio=
n is
>> correct, that is the laptops with a working RBTN method are the ones
>> having problems.
>>
>
> Hm... wait! There are machines with HW slider and type is RBTN_TOGGLE=
?
>
> I thought that all machines with HW slider has type RBTN_SLIDER and
> others have RBTN_TOGGLE.

Yes, this is the problem I've been talking about ever since the work
on this driver started. AFAIK we don't know how to detect these laptops
(my XPS13 is one of them).