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Date:   Mon, 20 Feb 2017 16:51:08 +0100
From:   Pali Rohár <>
To:     Marcos Paulo de Souza <>,
        Masaki Ota <>
Cc:     John Preston <>,
        Dmitry Torokhov <>,,
Subject: Unknown ALPS touchpad

Adding Masaki into discussion.

On Sunday 19 February 2017 20:01:07 Marcos Paulo de Souza wrote:
> There are other open bugs mentioning the same problem, with similar ALPS devices:

Unknown ALPS touchpad: E7=73 03 50, EC=73 02 02


Unknown ALPS touchpad: E7=73 00 14, EC=10 00 64

Should be supported since commit 95f75e91 which was introduced in Linux
version v3.13-rc4.


Unknown ALPS touchpad: E7=73 03 0a, EC=88 b3 22


Unknown ALPS touchpad: E7=73 03 0a, EC=88 b3 18

> This one without even a dmesg output:

Sorry, this one does not contain any useful information.

> Maybe they are related, or  also need some touch to let them being discovered as proper devices?

Masaki, can you look at those unknown ALPS touchpad identifiers and
provide some information about protocol which they are using?

Basically touchpads with these identifiers are unsupported by last
kernel version:

E7=73 03 50, EC=73 02 02
E7=73 03 0a, EC=88 b3 22
E7=73 03 0a, EC=88 b3 18

Pali Rohár

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