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Date:   Tue, 4 Apr 2017 06:55:00 +0000
From:   Masaki Ota <>
To:     Nikolaus Rath <>,
        linux-kernel <>,
        "" <>
Subject: RE: [PATCH 1/2] Alps HID I2C T4 device support

Hi, Nikolaus,

Your Touchpad is 044E:120C, right?

PATCH 1/2 supports 044E:120C Touchpad device.
I think you can use all features of this Touchpad.

PATCH 2/2 supports 044E:1215 Touchpad device.
You don't need to care about this.

If Touchpad does not work completely, there is something an error.
What does dmesg show?

Best Regards,
Masaki Ota
-----Original Message-----
From: Nikolaus Rath [] 
Sent: Tuesday, April 04, 2017 12:09 PM
To: 太田 真喜 Masaki Ota <>; linux-kernel <>;
Subject: Re: [PATCH 1/2] Alps HID I2C T4 device support

Hi Ota,

> -Support Alps HID I2C T4 Touchpad device.
> -Laptop names that use this Touchpad:HP Zbook Studio, Elitebook Folio 
> G1, Elitebook 1030 G1, Elitebook 1040 G3
> Signed-off-by: Masaki Ota <masaki.ota@...xxxxxxxx>
> ---
>  drivers/hid/hid-alps.c | 500 +++++++++++++++++++++++++++++++++++++++----------
>  drivers/hid/hid-core.c |   3 +-
>  drivers/hid/hid-ids.h  |   1 +
>  3 files changed, 403 insertions(+), 101 deletions(-)
I tried your patch on an HP Elitebook, but with rather limited success. Before, I was able to use the touchpad in limited fashion ( With your patch (applied on top of 4.10), the touchpad no longer reacts at all.

That said, I didn't find a patch 2/2 anywhere.. is there something missing?


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