https://bugs.kde.org/show_bug.cgi?id=434269
Bug ID: 434269
Summary: Pen/mouse stutters after every completed brush stroke
Product: krita
Version: 4.4.3-beta1
Platform: Appimage
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: General
Assignee: krita-bugs-n...@kde.org
Reporter: aut...@autumnlansing.com
Target Milestone: ---
SUMMARY
I originally added this problem onto Bug 421376, but after trying to diagnose
it better I see differences in that bug to what I'm experiencing, so I'm
creating a separate report.
Krita stutters two or three seconds after I complete a pen or mouse stroke. If
I start a new stroke right away, the stutter will happen while I'm drawing. If
I move the cursor across the canvas without drawing, the cursor will stutter as
it moves, and any brush stroke after that is normal. When I complete that brush
stroke however, the stutter cycle begins all over again.
See video:
https://drive.google.com/file/d/11i-G1C847naJ7YajYXeq9ZuDN4SJ3b53/view?usp=sharing
This is not a memory issue. It occurs when there's well over 10 GB of memory
free. It occurs with both pen tablet and mouse. It doesn't matter if Instant
Preview is on or off. It also ONLY occurs in Krita. It doesn't happen in GIMP
or any other program.
I'm experiencing this in the current beta, 4.4.3-beta1. It also occurred in
4.4.2.
I recently upgraded my Nvidia card from a Quadro 600 to a GeForce GTX 660. I'm
not sure if the issue was happening before that, but it's become painfully more
noticeable in the past couple of weeks, perhaps because I'm doing more detail
work in Krita at the moment. The GeForce card, however, is the same card I used
in my previous machine, and there were no problems with it up through November
of last year when I switched computers. I updated the Nvidia drivers today and
the problem still happens.
This stutter makes Krita rather annoying to work with. I've had to adjust my
workflow to wait a few seconds after I complete a line before I start drawing
another.
STEPS TO REPRODUCE
1. Draw a line.
2. Move the cursor after completing the line.
OBSERVED RESULT
The cursor stutters after two or three seconds.
EXPECTED RESULT
No stutter
SOFTWARE/OS VERSIONS
Krita
Version: 4.4.3-beta1
Languages: en_US, en
Hidpi: true
Qt
Version (compiled): 5.12.9
Version (loaded): 5.12.9
OS Information
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: linux
Kernel Version: 5.10.21-200.fc33.x86_64
Pretty Productname: Fedora 33 (Cinnamon)
Product Type: fedora
Product Version: 33
Desktop: X-Cinnamon
OpenGL Info
Vendor: "NVIDIA Corporation"
Renderer: "GeForce GTX 660/PCIe/SSE2"
Version: "4.6.0 NVIDIA 460.56"
Shading language: "4.60 NVIDIA"
Requested format: QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8,
stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer,
swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile
QSurfaceFormat::CompatibilityProfile)
Current format: QSurfaceFormat(version 4.6, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8,
stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer,
swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile
QSurfaceFormat::CompatibilityProfile)
Version: 4.6
Supports deprecated functions true
is OpenGL ES: false
QPA OpenGL Detection Info
supportsDesktopGL: true
supportsOpenGLES: true
isQtPreferOpenGLES: false
Hardware Information
GPU Acceleration: auto
Memory: 24034 Mb
Number of Cores: 4
Swap Location: /tmp
Current Settings
Current Swap Location: /tmp
Current Swap Location writable: true
Undo Enabled: true
Undo Stack Limit: 30
Use OpenGL: true
Use OpenGL Texture Buffer: true
Use AMD Vectorization Workaround: false
Canvas State: OPENGL_SUCCESS
Autosave Interval: 900
Use Backup Files: true
Number of Backups Kept: 1
Backup File Suffix: ~
Backup Location: Same Folder as the File
Backup Location writable: false
Use Win8 Pointer Input: false
Use RightMiddleTabletButton Workaround: false
Levels of Detail Enabled: false
Use Zip64: false
Display Information
Number of screens: 2
Screen: 0
Name: DVI-D-0
Depth: 24
Scale: 1
Resolution in pixels: 1920x1080
Manufacturer: HP Inc.
Model: HP VH240a-
Refresh Rate: 60
Screen: 1
Name: DP-0
Depth: 24
Scale: 1
Resolution in pixels: 1920x1080
Manufacturer: LG Electronics
Model: LG IPS FULLHD
Refresh Rate: 60
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