Bug 339914

Summary: wrong maximum of scrolling distance slider
Product: [Applications] systemsettings Reporter: sedrubal <kde>
Component: kcm_touchpadAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED DUPLICATE    
Severity: minor CC: mail
Priority: NOR    
Version: 5.17.5   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description sedrubal 2014-10-12 21:59:21 UTC 
After changing the scrolling distance for my touchpad (elantech on acer aspire v3 771g) it is scrolling too fast and on reentering the settings page I get the message: "Active settings don't match saved settings. You currently see saved settings." After researching I detected, that the slider for vertical and horizontal scrolling reaches from 0.0 to 10.0 mm, but when I set this option with xinput (xinput --set-prop 13 273 50 50) I can set this value from 1 to indef., where 1 is very fast and 50 is normal.

Reproducible: Always

Steps to Reproduce:
1. Change the scrolling distance in the settings menu and klick apply
2. close settings menu and open it again
3. scroll something
4. check and manipulate settings with xinput 


Actual Results:  
after step 2: you get the message: Active settings don't match saved settings. You currently see saved settings.
after step 3: the scrolling distance isn't like that, you expected
after step 4: you can rise the scrolling distance more than 10 (10mm is the maximum of the slider) (for me 50 is good and >>50 is possible)

Expected Results:  
after step 2: I want to see the settings i setted bevore
after step 3: I don't want to scroll as fast as it is
after step 4: I expected that the maximum of xinput is equal to the maximum of the slider
Comment 1 sedrubal 2014-10-12 22:05:01 UTC 
In xinput the touchpad is named as "ETPS/2 Elantech Touchpad"
Comment 2 Mat Lechner 2014-10-20 12:41:27 UTC 
I can confirm this issue here on a MacBook Air 4.2. There seems to be a problem with all the settings which are in millimeter units (so not just horizontal and vertical scrolling, but also e.g. maximal tap move). This completely messes the otherwise very nicely working automatic setup; the problem exists since the major redesign of kcm_touchpad. To get my touchpad working as before I need to manually change them via synclient ( synclient MaxTapMove=535 && synclient VertScrollDelta=243 && synclient HorizScrollDelta=243 )

This problem has also been reported by another user in Ubuntu:
https://bugs.launchpad.net/ubuntu/+source/kcm-touchpad/+bug/1308309
Comment 3 Alexander Mezin 2014-10-20 13:09:06 UTC 
Could anybody confirm this problem exists in latest version (1.1)? Because I've already fixed something very similar.

*** This bug has been marked as a duplicate of bug 331706 ***
Comment 4 sedrubal 2014-10-20 14:15:48 UTC 
I don't know how to get kcm 1.1...
Comment 5 Alexander Mezin 2014-10-28 17:24:13 UTC 
(In reply to sederic from comment #4)
> I don't know how to get kcm 1.1...

https://github.com/sanya-m/kcm-touchpad#how-to-install
Don't forget to remove corresponding KUbuntu package before installing
Comment 6 sedrubal 2014-10-28 23:58:04 UTC 
Ok, I know have vers. 1.1 installed. The Bug still exists.

> Don't forget to remove corresponding KUbuntu package before installing

Sorry for asking, but I don't know the apt instance of kcm-touchpad to
remove it...