Bug 175421 - Greedy detection of Sentelic touchpads by the BYD touchpad driver
Summary: Greedy detection of Sentelic touchpads by the BYD touchpad driver
Status: NEW
Alias: None
Product: Drivers
Classification: Unclassified
Component: Input Devices (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_input-devices
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-10-02 15:46 UTC by Christophe Tordeux
Modified: 2016-10-02 15:48 UTC (History)
0 users

See Also:
Kernel Version: v4.6 to v4.8
Subsystem:
Regression: No
Bisected commit-id:


Attachments

Description Christophe Tordeux 2016-10-02 15:46:25 UTC
Starting with kernel v4.6, my Sentelic touchpad STL3888_C0 (and probably other Sentelic touchpads are wrongly detected as BYD touchpads by the BYD touchpad driver and lose multitouch features.

This is a bug of the BYD driver in drivers/input/mouse/byd.c because the BYD driver interprets a standard PS/2 protocol answer from the Sentelic touchpad as handshake from a BYD touchpad.

I submitted a patch to fix this but had no reply:
http://www.spinics.net/lists/linux-input/msg46992.html

This is affecting other users see for example this forum post:
https://forum.manjaro.org/t/touchpad-working-in-kernel-4-5-but-not-in-4-6-or-4-7/7714
Comment 1 Christophe Tordeux 2016-10-02 15:48:54 UTC
Sorry, the patch I submitted can be found at this address:
http://www.spinics.net/lists/linux-input/msg46984.html


(In reply to Christophe Tordeux from comment #0)
> Starting with kernel v4.6, my Sentelic touchpad STL3888_C0 (and probably
> other Sentelic touchpads are wrongly detected as BYD touchpads by the BYD
> touchpad driver and lose multitouch features.
> 
> This is a bug of the BYD driver in drivers/input/mouse/byd.c because the BYD
> driver interprets a standard PS/2 protocol answer from the Sentelic touchpad
> as handshake from a BYD touchpad.
> 
> I submitted a patch to fix this but had no reply:
> http://www.spinics.net/lists/linux-input/msg46992.html
> 
> This is affecting other users see for example this forum post:
> https://forum.manjaro.org/t/touchpad-working-in-kernel-4-5-but-not-in-4-6-or-
> 4-7/7714

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