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

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Message-ID: <ZL8T6ptGgYdF3D96@google.com>
Date:   Mon, 24 Jul 2023 17:14:34 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Bagas Sanjaya <bagasdotme@...il.com>
Cc:     Henrik Rydberg <rydberg@...math.org>,
        Verot <verot.wrongdoer713@...plelogin.com>,
        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: Re: Fwd: Kernel 6.4.4 breaks Elan Touchpad 1206

On Mon, Jul 24, 2023 at 05:10:03PM -0700, Dmitry Torokhov wrote:
> On Tue, Jul 25, 2023 at 07:00:21AM +0700, Bagas Sanjaya wrote:
> > 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
> 
> Please don't as ELAN1206:00 04F3:30F1 looks like I2C-HID and not PS/2
> device that 7b63a88bb62ba2 would affect.

Also 7b63a88bb62ba2 is present in 6.1 since v6.1.34.

Thanks.

-- 
Dmitry