Bug 46371

Summary:	SynPS/2 Synaptics TouchPad missing space
Product:	Drivers	Reporter:	kriha6
Component:	Input Devices	Assignee:	drivers_input-devices
Status:	CLOSED CODE_FIX
Severity:	normal	CC:	arutemus, dmitry.torokhov, florian, kdudka, p.finizio, reiver, seth
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	3.5.3	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	maximum coordinates xinput list-props Patch to adjust threshold for treating position values as negative

Description kriha6 2012-08-23 14:45:53 UTC

There is "dead" space on the right side of the touchpad that cannot be used. It is insensitive to touching.

Comment 1 Dmitry Torokhov 2012-08-23 17:13:24 UTC

What tool did you use to detect this? Does evtest utility report events when finger in that dead zone?

Comment 2 kriha6 2012-08-23 21:04:19 UTC

Yes, evtest does report events when I finger the dead zone.

Comment 3 Dmitry Torokhov 2012-08-23 21:45:40 UTC

Could you tell me what is maximum coordinates reported by evtest for your touchpad and also what 'xinput list-props' shows for it?

Comment 4 kriha6 2012-08-24 06:12:17 UTC

Created attachment 78361 [details]
maximum coordinates

I wasn't sure what you mean by maximum coordinates but I touched the four corners of the touchpad while runnning evtest and this is the output.

Comment 5 kriha6 2012-08-24 06:14:44 UTC

Created attachment 78371 [details]
xinput list-props

Comment 6 Alan Swanson 2012-09-09 00:18:36 UTC

I have same problem starting with 3.5.3 where the vertical scroll region on Synaptics touchpad no longer works, only pressure events are reported. Reverting "Input: synaptics - handle out of bounds values from the hardware" resolves the problem.

Comment 7 Seth Forshee 2012-09-10 21:42:58 UTC

Created attachment 79731 [details]
Patch to adjust threshold for treating position values as negative

Could you test this patch to see if it fixes the problem? Thanks.

Comment 8 Alan Swanson 2012-09-11 10:28:40 UTC

Yes, this patch fixes the issue with my vertical scroll region. Thank you.

Comment 9 Arteom 2012-09-23 22:49:11 UTC

I had the same problem. Patch fixed it.

Comment 10 Alan Swanson 2012-10-01 12:40:09 UTC

Unfortunately this bugfix was not included with the just released Linux 3.6 but is in Dmitri's for-linux input git as of two days ago. After it's in 3.7-rc can we get a stable inclusion request for 3.5 and 3.6 please?

Comment 11 Dmitry Torokhov 2012-10-01 16:20:26 UTC

Yes, sorry about this. The commit is marked for stable so should get picked up for 3.6.1.

Comment 12 Piero Finizio 2012-10-10 08:24:02 UTC

All right on 3.6.1-1.fc18.i686 from Fedora - Kojii's Repository.
Thank you Dmitry.

Comment 13 Florian Mickler 2012-10-15 20:46:28 UTC

A patch referencing this bug report has been merged in Linux v3.7-rc1:

commit 824efd37415961d38821ecbd9694e213fb2e8b32
Author: Seth Forshee <seth.forshee@canonical.com>
Date:   Fri Sep 28 10:29:21 2012 -0700

    Input: synaptics - adjust threshold for treating position values as negative