Bug 457818 - Canvas window not responding to changes like painting, or zooming in and out. The percentage popup for the zooming shows and changes, but nothing happens on the canvas. The menu and dockers respond still.
Summary: Canvas window not responding to changes like painting, or zooming in and out....
Status: RESOLVED NOT A BUG
Alias: None
Product: krita
Classification: Applications
Component: * Unknown (other bugs)
Version First Reported In: 5.1.0-RC1
Platform: Microsoft Windows Microsoft Windows
: NOR normal
Target Milestone: ---
Assignee: Krita Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-08-12 23:20 UTC by Sketchbookluxe
Modified: 2023-01-26 13:30 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

Attachments
Krita Usage log (163.43 KB, application/vnd.openxmlformats-officedocument.wordprocessingml.document)
2022-08-12 23:20 UTC, Sketchbookluxe 		Details
View All Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description Sketchbookluxe 2022-08-12 23:20:18 UTC 
Created attachment 151293 [details]
Krita Usage log

SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***


STEPS TO REPRODUCE
1. Sketch with 'c) pencil-2', 'smudge soft', and 'b) Eraser Small' in a 3GB Krita file with at least 29 layers for up to eight hours using a Samsung stylus pen (NOT the S-pen Pro) on a GalaxyBook Pro 360.  Integrate the following steps while drawing.
2. Switch between normal blending mode and erase blending mode often.  Also switch between layers often.  Sometimes try using the stylus button to function as an eraser.  The stylus button will take a long time to switch to an eraser brush, if it does.
3. Zoom in and out often on the canvas with touch input using two fingers to pinch and pull.  Then try drawing on the canvas often after zooming in or out.

OBSERVED RESULT
The canvas eventually will not show any new drawing strokes.  It will also not zoom in or out visibly on the canvas.  It will show that the zoom percentage is changing in the black popup, but nothing will happen to the canvas.  The menu and dockers will still respond as normal.  If a new file is opened, the canvas will still not display changes.  Only after restarting Krita, will the canvas function normally again for a time.

EXPECTED RESULT
The canvas will continue to display new drawing strokes for as long as you use Krita without having to restart the program.  The canvas will visibly zoom in and out using a two finger pinch and pull touch gensture for as long as Krita is used without needing to restart the program.

SOFTWARE/OS VERSIONS
Windows: 10 x64
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
Comment 1 wolthera 2023-01-26 13:30:02 UTC 
Hi,

What I am seeing in the usage log you shared is that Krita is running out of memory and the problems you describe are consistent with that. You can tell when this happens, because the resolution info in the status bar at the bottom will have turned red (it tries to show how much memory is being consumed, and turns red when it's over 80~%).

My recommendation would be that you first try to increase the amount of memory Krita is allowed to use in settings -> configure Krita -> Performance.  I'd recommend setting it to 80% maximum, so that you still may be able to run other applications like a music player or chat program. Lowering the amount of undo steps can also help. If you keep having memory troubles despite this, it might be time to accept that the kind of artworks you're making are just too big for what your computer can handle, and start working smaller or with fewer layers.