Message-ID: <55254969.5060402@redhat.com>
Date:	Wed, 08 Apr 2015 17:29:45 +0200
From:	Hans de Goede <hdegoede@...hat.com>
To:	Hans de Bruin <jmdebruin@...net.nl>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	linux-input <linux-input@...r.kernel.org>,
	"linux-kernel@...r.kernel.org >> Linux Kernel Mailing List" 
	<linux-kernel@...r.kernel.org>,
	Pali Rohár <pali.rohar@...il.com>
Subject: Re: 4.0.0-rc mouse/keyboard events get stuck

Hi,

On 08-04-15 12:59, Hans de Bruin wrote:
> On 04/06/2015 11:23 PM, Dmitry Torokhov wrote:
>> Hi Hans,
>>
>> On Mon, Apr 6, 2015 at 11:39 AM, Hans de Bruin <jmdebruin@...net.nl> wrote:
>>> Since 4.0.0-rc something mu laptop has some mouse /keyboard problems.
>>> When I play KDE kpatience, a card game, card stick to my mousepointer: left
>>> mouse button down on a card, move mouse pointer and card to another place.
>>> left mouse button up to drop the card. This should drop the card, but often
>>> the mouse button up events gets stuck somewhere until I move he mouse
>>> pointer a little bit.
>>> In web based mail clients something similar happens when I drag mail to
>>> another folder.
>>> Sometime after I start a xterm and start typing, the letters don't appear
>>> until move the mouse pointer.
>>>
>>> Bisecting is out of the question. This kernel realease was so dramatic I was
>>> glad to have functioning kde screen when rc4 arrived.
>>>
>>> My laptop is a Dell Latitude D430, it has a touchpad and a pointer an two
>>> sets of buttons.
>>>
>>> dmesg
>>> [    0.636492] input: AT Translated Set 2 keyboard as
>>> /devices/platform/i8042/serio0/input/input4
>>> [    0.633108] mousedev: PS/2 mouse device common for all mice
>>> [   80.543044] input: PS/2 ALPS Mouse as
>>> /devices/platform/i8042/serio1/input/input8
>>
>> Linus just merged 2 fixes to ALPS driver that might help you. Could
>> you please try compiling tip of the tree and telling me if it fixes
>> your issue?
>>
>
> I am at rc.7 and the problem is still there. But maybe you can get away with "user error". Here is a picture of the layout of my laptop:
>
> http://img.clubic.com/000000DC00604500-photo-dell-latitude-d430-4.jpg
>
> Lets call the blue thing ts. The buttons directly beneath the keys ts-l and ts-r. For the touchpad tp, tp-l and tp-r. And because one can never have to many input devices um, um-l and um-r for a usb mouse.
>
> When I play kpatience and stick to one device ts or ts-l or mp and mp-l no problems arise. I can also mix devices for example um and tp-l. There are several combinations. Only one of these ts and tp-l show the problematic behavior. This is the way i use my laptop (user error?)

Ok, this one is a regression which is caused by:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/input/mouse/alps.c?id=04aae283ba6a8cd4851d937bf9c6d6ef0361d794

I've attached a fix which I will formally send / submit upstream in a few minutes too.

> Now something to distract you from the issue, something almost completely different. Something which is also present in 3.18 and probably before. Firefox and other programs have scrollbars on the right side. One can click on it, move the slider and release the button. Except with the combination tp and ts-l, It does not work. Al other combinations do.

This one is not a regression, it is an issue which we've seem to have had for ages and no one has found, or at least
described this accurately until now :) I've done some debugging and this one is fixable, but that is best left to 4.1

I'll whip up a patch and submit it when it is ready.

Regards,

Hans

View attachment "0001-alps-Fix-left-touchpad-button-getting-stuck-when-usi.patch" of type "text/x-patch" (2880 bytes)

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