linux-kernel - Re: [PATCH 2/2] toshiba-acpi: Support TOS1900-type devices

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Date:	Tue, 9 Jun 2009 17:45:29 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Azael Avalos <coproscefalo@...il.com>
Cc:	linux-acpi@...r.kernel.org, dsilvers@...tec.co.uk,
	toshiba_acpi@...ebeam.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] toshiba-acpi: Support TOS1900-type devices

On Tue, Jun 09, 2009 at 10:42:00AM -0600, Azael Avalos wrote:

> However, everytime you poll the INFO method, the TECF variable receives
> a zero, so the next time you want to poll the INFO method, you
> receive a zero also, unless you "activate" the TECF variable again
> perhaps tru' _Q43 or by directly writing a one into it.

Right, but _Q43 should be called when you hit a hotkey. The fact that 
it's not is what's causing the problem here.

> 1. Activate Hotkey Events call 0x1E.
> 2. It activates something internally causing Hotkey Events being
>    stored in TOHK.
> 3. Whenever I press an Fn-Key combo let's say Fn-Esc, the actual key gets
>    stored in TOHK, in this case 0x101, but just lasting a couple seconds
>    (or even less...), it seems it's volatile.
> 4. Polling TOHK via the INFO method or directly gets me the actual hotkey,
>    but again, must real quick since it will disappear (I used 100 ms polling).
> 5. Figure out a way of getting those Hotkey Events in a nice manner...
>    I managed to get them, but sometimes I got them repeated due to the
>    polling timer...

When you hit a hotkey, what happens in /proc/interrupts? Do you see an 
i8042 event or an acpi event?
-- 
Matthew Garrett | mjg59@...f.ucam.org
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