Re: ALPS DualPoint double click bug

From: "Pali Rohár" <pali.rohar@gmail.com>
To: Douglas Christman <douglaschristman@gmail.com>
Cc: linux-input@vger.kernel.org, Hans de Goede <hdegoede@redhat.com>,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>
Subject: Re: ALPS DualPoint double click bug
Date: Wed, 22 Jul 2015 09:21:16 +0200	[thread overview]
Message-ID: <20150722072116.GA22138@pali> (raw)
In-Reply-To: <CANuv8QxKap=K=OoCufcM-Yxujmg+3sUOjWX2D9r7qf==EQoTFQ@mail.gmail.com>

On Tuesday 21 July 2015 19:51:48 Douglas Christman wrote:
> On Tue, Jul 21, 2015 at 3:12 AM, Pali Rohár <pali.rohar@gmail.com> wrote:
> > It is not enough. If do not want to recompile full kernel, but just only
> > psmouse.ko I think that the easiest way is to change this define
> >
> >  #define psmouse_dbg
> >
> > in file drivers/input/mouse/psmouse.h to call dev_warn instead dev_dbg.
> > And then just compile psmouse.ko and reload it.
> 
> Thanks, that seemed to do the trick.  This is what I get from dmesg now:
> 
> [    6.281814] psmouse serio1: cypress_ps2: send extension cmd 0x00, [0 0 0 0]
> [    6.540028] psmouse serio1: cypress_ps2: Command 0x00 response data
> (0x): 00 00 14
> [    6.582031] psmouse serio1: alps: E6 report: 00 00 64
> [    6.617471] psmouse serio1: alps: E7 report: 22 02 14
> [    6.656974] psmouse serio1: alps: EC report: 10 00 64
> [    7.104479] psmouse serio1: alps: E6 report: 00 00 64
> [    7.139714] psmouse serio1: alps: E7 report: 22 02 14
> [    7.176568] psmouse serio1: alps: EC report: 10 00 64
> [    7.368849] psmouse serio1: alps: F5 report: 05 01 0a
> [    7.541367] input: AlpsPS/2 ALPS DualPoint Stick as
> /devices/platform/i8042/serio1/input/input11
> [    7.571454] input: AlpsPS/2 ALPS DualPoint TouchPad as
> /devices/platform/i8042/serio1/input/input8

Ok, your ALPS touchpad is identified as:

{ { 0x22, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } },	/* Dell Latitude D600 */

You mentioned that commit 92bac83d introduced your problem:

========================================
commit 92bac83dd79e60e65c475222e41a992a70434beb
Author: Hans de Goede <hdegoede@redhat.com>
Date:   Sun Apr 12 15:42:35 2015 -0700

    Input: alps - non interleaved V2 dualpoint has separate stick button bits
========================================

Hans, can you look at this problem as it is clearly problem with
protocol V2?

-- 
Pali Rohár
pali.rohar@gmail.com
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