From: Chase Douglas <chase.douglas@canonical.com>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>, linux-input@vger.kernel.org
Subject: Re: disable touchpad?
Date: Fri, 24 Feb 2012 14:27:06 -0800 [thread overview]
Message-ID: <4F480EBA.7020509@canonical.com> (raw)
In-Reply-To: <1396991.aDtuZKT2u4@dtor-d630.eng.vmware.com>
On 02/24/2012 01:31 PM, Dmitry Torokhov wrote:
> On Friday, February 24, 2012 12:04:04 PM Randy Dunlap wrote:
>> (b) My Toshiba Portege laptop has a touchpad on/off button. Is that
>> supported?
>
> Kernel probably emits one of KEY_TOUCHPAD_* for it; whether it is handled
> in userspace I do not know.
I have heard from some of our engineers who have looked into this that
the interface for these buttons is not standardized. Sometimes the
buttons turn off the touchpad in hardware. Sometimes they emit events
that tell the OS to turn it off, and the OS needs to know how to handle it.
On top of that, LEDs are sometimes there to tell you if the trackpad is
on or off. These are also not standardized. Sometimes they are hooked up
to the hardware, and when the hardware is off they go off. Sometimes
they are just a plain old LED and the OS needs to turn it on and off.
Fun...
-- Chase
next prev parent reply other threads:[~2012-02-24 22:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-24 20:04 disable touchpad? Randy Dunlap
2012-02-24 21:31 ` Dmitry Torokhov
2012-02-24 22:27 ` Chase Douglas [this message]
2012-02-24 22:37 ` Seth Forshee
2012-02-25 1:49 ` Randy Dunlap
2012-02-24 22:55 ` Dmitry Torokhov
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