linux-kernel - Re: Elantech SMBus support regression

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Date:   Wed, 12 Dec 2018 15:25:38 +0100
From:   Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:     Kai Heng Feng <kai.heng.feng@...onical.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     "open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: Elantech SMBus support regression

Hi,

sorry for the late reply. I was always meaning to fix this the proper
way but couldn't dedicate a full day of work to go to the bottom of
elan_i2c.

Meanwhile, I am thinking at simply having a blacklist of devices that
we know are not working well (P52, L480, L580 and P72).

Could you get the value of /sys/bus/serio/devices/serio1/firmware_id
from all of these laptops?
I know the P52 is LEN2131, but I don't seem to find the other PNPIds.

Cheers,
Benjamin

On Thu, Nov 22, 2018 at 5:22 AM Kai Heng Feng
<kai.heng.feng@...onical.com> wrote:
>
> Hi Benjamin,
>
> It appears the Elantech SMBus support breaks some users’ touchpad.
>
> Please have a look at [1] [2], thanks!
>
> [1] https://bugs.launchpad.net/bugs/1803600
> [2] https://bugs.archlinux.org/task/59714
>
> Kai-Heng