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Date: Tue, 6 Jun 2017 09:59:11 -0700
From: Laura Abbott <labbott@...hat.com>
To: Paul Donohue <linux-kernel@...lSD.com>
Cc: Masaki Ota <masaki.ota@...alps.com>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Pali Rohar <pali.rohar@...il.com>,
Nick Fletcher <nick.m.fletcher@...il.com>,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
scott.s.lowe@...il.com
Subject: Re: [REGRESSION] Touchpad failure after e7348396c6d5 ("Input: ALPS -
fix V8+ protocol handling (73 03 28)")
On 06/02/2017 09:03 PM, Paul Donohue wrote:
> This might be related to https://bugzilla.kernel.org/show_bug.cgi?id=195215
>
> Could you have the user try this change? https://bugzilla.kernel.org/show_bug.cgi?id=195215#c12
>
https://bugzilla.redhat.com/show_bug.cgi?id=1447327#c13
"Cursor movement seems to work, but there are intermittent two-finger scrolling
issues on the right-hand side of the touchpad. There are no issues with cursor
movement or two-finger scrolling on the left-hand side of the touchpad."
> On Fri, Jun 02, 2017 at 10:54:52AM -0700, Laura Abbott wrote:
>> Hi,
>>
>> Fedora got a bug report https://bugzilla.redhat.com/show_bug.cgi?id=1447327
>> of a touchpad failure on a Dell Latitude E7370. Testing showed that the
>> bad commit was
>>
>> commit e7348396c6d51b57c95c6646c390cd078e038e19
>> Author: Masaki Ota <masaki.ota@...alps.com>
>> Date: Fri Mar 17 14:10:57 2017 -0700
>>
>> Input: ALPS - fix V8+ protocol handling (73 03 28)
>>
>> Devices identified as E7="73 03 28" use slightly modified version of V8
>> protocol, with lower count per electrode, different offsets, and different
>> feature bits in OTP data.
>>
>> Fixes: aeaa881f9b17 ("Input: ALPS - set DualPoint flag for 74 03 28 devices")
>> Signed-off-by: Masaki Ota <masaki.ota@...alps.com>
>> Acked-by: Pali Rohar <pali.rohar@...il.com>
>> Tested-by: Paul Donohue <linux-kernel@...lSD.com>
>> Tested-by: Nick Fletcher <nick.m.fletcher@...il.com>
>> Cc: stable@...r.kernel.org
>> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
>>
>> I suspect this particular model needs special handling as well?
>>
>> Thanks,
>> Laura
>>
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