Bug 362533

Summary:	Tremulous lines when drawing with pencil (hidpi related?)
Product:	[Applications] krita	Reporter:	Ilya V. Portnov <portnov>
Component:	Brush engines	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED WAITINGFORINFO
Severity:	normal	CC:	alvin, halla, osxyz, raghu
Priority:	NOR
Version:	3.0 Beta
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Attachments:	Fuzzy lines 1 (basic smoothing enabled) Fuzzy lines 2 (smoothing disabled) A better situation (krita from git master, debian unstable, 1920x1800 display) Another better situation (kubuntu 16.04, 1366x768 laptop) Tablet log while drawing fuzzy lines (kubuntu, hidpi laptop) Tablet log from lowdpi laptop (kubuntu, 1366x768) Tablet log from lowdpi desktop (debian unstable, git master, 1920x1280)

Description Ilya V. Portnov 2016-05-01 10:14:35 UTC

If I draw many straight lines in a row with thin pencil brush, they are a bit tremolous.
Reproduces on krita3-testing from lime ppa and latest appimage.
This is a laptop with 2880x1620.

Reproducible: Always

Comment 1 Ilya V. Portnov 2016-05-01 10:15:11 UTC

Created attachment 98722 [details]
Fuzzy lines 1 (basic smoothing enabled)

Comment 2 Ilya V. Portnov 2016-05-01 10:15:48 UTC

Created attachment 98723 [details]
Fuzzy lines 2 (smoothing disabled)

Comment 3 Ilya V. Portnov 2016-05-01 10:17:08 UTC

Created attachment 98724 [details]
A better situation (krita from git master, debian unstable, 1920x1800 display)

Comment 4 Ilya V. Portnov 2016-05-01 10:29:13 UTC

Created attachment 98725 [details]
Another better situation (kubuntu 16.04, 1366x768 laptop)

Comment 5 Ilya V. Portnov 2016-05-01 11:37:52 UTC

Created attachment 98727 [details]
Tablet log while drawing fuzzy lines (kubuntu, hidpi laptop)

Comment 6 Ilya V. Portnov 2016-05-01 11:42:19 UTC

Created attachment 98728 [details]
Tablet log from lowdpi laptop (kubuntu, 1366x768)

Comment 7 Ilya V. Portnov 2016-05-01 11:44:55 UTC

Created attachment 98729 [details]
Tablet log from lowdpi desktop (debian unstable, git master, 1920x1280)

Comment 8 eliotJ 2016-05-15 22:44:53 UTC

Hi

Does it's also exists in Krita v2.9.11 or does it's a regression in v3.0 ?

Comment 9 Alvin Wong 2017-09-23 08:10:11 UTC

Hi, is this still present on 3.2.1 or 3.3.0-rc.1?

I doubt this is related to hidpi, could be tablet or driver. Were you testing on all the systems with the same tablet and driver?

Comment 10 Halla Rempt 2017-09-28 14:40:37 UTC

Needinfo

Comment 11 Raghavendra kamath 2018-08-10 04:57:19 UTC

Hi  Ilya

Can you please check if this is still reproducible in the latest version of Krita,

for now I am going to close this bug report due to lack of activity and reply, if you think this bug is still present in the latest version of krita , please feel free to re-open this bug report

thank you

Comment 12 Ilya V. Portnov 2018-08-10 13:02:25 UTC

Hello. 
Unfortunately, currently I do not have access to that HiDPI laptop to check. I'll write here if any news.