Date: Wed, 12 Jul 2017 09:16:43 +0200
Message-ID: <s5hlgnuf7l0.wl-tiwai@suse.de>
From: Takashi Iwai <tiwai@suse.de>
To: Paul Donohue <linux-kernel@PaulSD.com>
Cc: Laura Abbott <labbott@redhat.com>, Masaki Ota <masaki.ota@jp.alps.com>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Pali Rohar <pali.rohar@gmail.com>,
        Nick Fletcher <nick.m.fletcher@gmail.com>,
        "linux-input@vger.kernel.org" <linux-input@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "scott.s.lowe@gmail.com" <scott.s.lowe@gmail.com>
Subject: Re: [REGRESSION] Touchpad failure after e7348396c6d5 ("Input: ALPS - fix V8+ protocol handling (73 03 28)")
In-Reply-To: <20170711195821.GG1855@TopQuark.net>
References: <937d0082-5c51-e0b5-dcf9-efade5ecbde5@redhat.com>
        <20170603040349.GB16345@TopQuark.net>
        <e841f28c-4d63-170a-482f-8ef1deda1900@redhat.com>
        <KAWPR01MB1092C3572946C54C2CC4DEFBC7CD0@KAWPR01MB1092.jpnprd01.prod.outlook.com>
        <75b84b97-5f36-a3be-bb4e-e43cd72d9921@redhat.com>
        <KAWPR01MB1092CFFDF4C4490669DCE92CC7C00@KAWPR01MB1092.jpnprd01.prod.outlook.com>
        <20170619184315.GF1855@TopQuark.net>
        <0995261b-8d19-64af-9b66-e1eab579a3d4@redhat.com>
        <20170619232026.GG1855@TopQuark.net>
        <s5hwp7f3rdc.wl-tiwai@suse.de>
        <20170711195821.GG1855@TopQuark.net>
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On Tue, 11 Jul 2017 21:58:21 +0200,
Paul Donohue wrote:
> 
> On Tue, Jul 11, 2017 at 05:50:07PM +0200, Takashi Iwai wrote:
> > Hi, just joining to the party in the middle, as I'm also facing the
> > same problem on Dell E7270 laptop.  Has this issue already been
> > addressed?
> > 
> > If not, the following was my result:
> > 
> > - the first patch slowed the pointer movement a lot, it's even slower
> >   than the old kernel (e.g. 4.4.x).
> >   The two finger scroll works fine on all touchpad area now.
> > 
> > - the second patch made the pointer movement even faster than now (as
> >   I feel, not quite sure).  The two finger scroll doesn't work at the
> >   right side of the touchpad.
> > 
> > 
> > The kernel output from the first patch is below:
> >   psmouse serio1: alps: test1 pitch 37x37 num-electrodes 8x7 physical size 25x22mm res 69x69 max 1792x1536
> > 
> > Let me know if you have any further test.
> > 
> > 
> > thanks,
> > 
> > Takashi
> 
> Do you have the kernel output from the second patch?

Here it is:

psmouse serio1: alps: test2 pitch 50x54 num-electrodes 20x11 physical size 95x54mm res 25x23 max 2432x1280


Takashi