linux-kernel - Fwd: Kernel 6.4.4 breaks Elan Touchpad 1206

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Message-ID: <42bc8e02-5ee0-f1c8-610e-e16391e54ee2@gmail.com>
Date:   Tue, 25 Jul 2023 07:00:21 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Henrik Rydberg <rydberg@...math.org>,
        Verot <verot.wrongdoer713@...plelogin.com>
Cc:     Linux Input Devices <linux-input@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Regressions <regressions@...ts.linux.dev>,
        Linux Stable <stable@...r.kernel.org>
Subject: Fwd: Kernel 6.4.4 breaks Elan Touchpad 1206

Hi,

I notice a regression report on Bugzilla [1]. Quoting from it:

> Description:
> When booting into Linux 6.4.4, system no longer recognizes touchpad input (confirmed with xinput). On the lts release, 6.1.39, the input is still recognized.
> 
> Additional info:
> * package version(s): Linux 6.4.4, 6.1.39
> * Device: ELAN1206:00 04F3:30F1 Touchpad
> 
> Steps to reproduce:
> - Install 6.4.4 with Elan Touchpad 1206
> - Reboot
> 
> The issue might be related to bisected commit id: 7b63a88bb62ba2ddf5fcd956be85fe46624628b9
> This is the only recent commit related to Elantech drivers I've noticed that may have broken the input.

See Bugzilla for the full thread:

To the reporter (Verot): Can you attach dmesg and lspci output?

Anyway, I'm adding this regression to be tracked by regzbot:

#regzbot introduced: 7b63a88bb62ba2 https://bugzilla.kernel.org/show_bug.cgi?id=217701
#regzbot title: OOB protocol access fix breaks Elan Touchpad 1206

Thanks.

[1]: https://bugzilla.kernel.org/show_bug.cgi?id=217701

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