Bug 419162

Summary:	Poor quality of the stroke pen
Product:	[Applications] krita	Reporter:	ca3 <ca3games>
Component:	Tablets (tablet issues are only very rarely bugs in Krita!)	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED DOWNSTREAM
Severity:	normal	CC:	halla, tamtamy.tymona
Priority:	NOR
Version:	4.2.7.1
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description ca3 2020-03-23 22:05:00 UTC

SUMMARY
There's really poor quality of the pen stroke using Lubuntu 19.10 and using a Parblo A609 Pen Tablet.
Any random stroke suddenly isn't clean but can end up having a random stroke attack and create a really poor line.

STEPS TO REPRODUCE
https://www.youtube.com/watch?v=XWIwyfA75PI

I attach a video of the stroke results.

Comment 1 Tiar 2020-03-23 22:11:15 UTC

Can you please check Configure Krita -> Tablet Settings -> Tablet Tester. Do the artefacts appear there as well?

Also do you use a repository version or the appimage? If you're not using the appimage, please try it.

Comment 2 ca3 2020-03-23 22:28:05 UTC

(In reply to Tymond from comment #1)
> Can you please check Configure Krita -> Tablet Settings -> Tablet Tester. Do
> the artefacts appear there as well?

Can confirm the artifacts don't appear under tablet Tester.

Also I'm using the Ubuntu sudo apt install command (Lubuntu 19.10).

Comment 3 Bug Janitor Service 2020-03-24 04:33:18 UTC

Thanks for your comment!

Automatically switching the status of this bug to REPORTED so that the KDE team
knows that the bug is ready to get confirmed.

In the future you may also do this yourself when providing needed information.

Comment 4 Halla Rempt 2020-03-24 10:40:17 UTC

Please try the appimage instead (https://download.kde.org/stable/krita/4.2.9/krita-4.2.9-x86_64.appimage) . We apply a lot of patches to Qt to improve they way Qt handles tablets.

Comment 5 ca3 2020-03-24 20:44:42 UTC

(In reply to Boudewijn Rempt from comment #4)
> Please try the appimage instead
> (https://download.kde.org/stable/krita/4.2.9/krita-4.2.9-x86_64.appimage) .
> We apply a lot of patches to Qt to improve they way Qt handles tablets.

Can confirm the quality of the line is greatly improved, however there still a very few artifacts on the stroke, but very few.

It's much better line quality with the appimage binary.

Comment 6 Bug Janitor Service 2020-03-25 04:33:20 UTC

Thanks for your comment!

Automatically switching the status of this bug to REPORTED so that the KDE team
knows that the bug is ready to get confirmed.

In the future you may also do this yourself when providing needed information.

Comment 7 Halla Rempt 2020-03-25 10:57:00 UTC

Okay, then there is nothing we can do, other than recommending that distribution patch Qt.