Bug 411487 - kcm-wacomtablet is providing incorrect default settings, causing choppy, wobbly lines and inability to click
Summary: kcm-wacomtablet is providing incorrect default settings, causing choppy, wobb...
Alias: None
Product: wacomtablet
Classification: Plasma
Component: general (show other bugs)
Version: 3.1.0
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Valerii Malov
Depends on:
Reported: 2019-09-01 09:27 UTC by Tyson Tan
Modified: 2019-12-21 07:18 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In:


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Description Tyson Tan 2019-09-01 09:27:57 UTC
After upgrading to a larger Wacom pen display (DTH-3220/3221), I noticed it draws wobbly lines in Krita and it felt less responsive than the smallest model (DTH-1320). 

I found out that kcm-wacomtablet is providing incorrect default settings:
Raw Sample Rate = 1
Suppress Rate = 0

While the correct default settings should be:
Raw Sample Rate = 4
Suppress Rate = 2
(as the popup message would suggest them)

After I set them correct, The lines became smooth and responsive again. Please double-check the settings. Thank you!

Manjaro Linux KDE 18.04
KDE Plasma 5.16.4
KDE Framwork 5.60.0
Qt 5.13.0
Linux Kernel 5.2.8-1
libinput 1.14.0-1
kcm-wacomtablet 3.1.1
Comment 1 Oliver Sander 2019-09-30 14:56:07 UTC
I'd like to try this on Debian Buster, but I don't find the kcm-wacomtablet program.  What is the Debian way to get the sample and suppress rates?
Comment 2 Shawn Rutledge 2019-12-21 07:16:30 UTC
I was just trying the Wacoms on KDE Neon (I managed to reproduce https://bugreports.qt.io/browse/QTBUG-77826 there).  What I noticed is that even more of the defaults were not sane: as soon as I installed kcm-wacomtablet, I couldn't click with the stylus anymore.  It took me a while to realize that it had unmapped all the buttons, and I had to set that up again manually (map stylus tip to left click, one button to right click and another to middle click).  This issue is also mentioned here, by the way:  https://wiki.manjaro.org/index.php?title=Wacom_Tablet_And_Pen#KDE_Plasma_5_2
Comment 3 Shawn Rutledge 2019-12-21 07:18:31 UTC
I didn't really notice lines being choppy though, but maybe something is different on my system.