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Bug with grease pencil for 2D animation: pen locks when I try to draw a line that starts with a hard pen sensitivity.
Needs Information from User, NormalPublic


System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: rB02948a2cab44
(i also tried the 2.93.0 latest alpha at the time of writing and the error was there too)

Short description of error
When I use my tablet pen (Wacom intuos pro large - model PTH-851) and I attempt to draw a new line with a hard pen pressure, the cursor onscreen instead locks in place, doesn't move, and no line is drawn so long as I am still pressing down. Going to a lighter pen pressure after this situation, or starting a new line with a soft pen pressure will allow the line to draw as normal. This happens with pen pressure settings for radius / strength turned off. I do not encounter this issue in other programs like Krita, Autodesk Sketchbook, or Adobe Animate. I can still achieve a line with hard pen pressure if I start with a soft pen pressure and then press harder.

Exact steps for others to reproduce the error
You may need the Wacom tablet model I described, I'm not sure. Start up a new 2D animation blend file (or look at the blend file provided if you want to see what it looks like when the error occurs), and try to draw a line while immediately pressing as hard as possible with the pen. For comparison, also try a line that starts with a soft pen pressure.

Have a good day!

Event Timeline

You may need the Wacom tablet model I described, I'm not sure.

thanks for the report . @Falk David (filedescriptor) , guess you have the same system to reproduce .

I cannot reproduce this on Linux.

@Falk David (filedescriptor) do you have a Windows machine to also confirm with?

@- (Eneyx) Could you check for a driver update? If this is your device 6.3.43-3 is the newest version, released last month.

Dalai Felinto (dfelinto) changed the task status from Needs Triage to Needs Information from User.Tue, Jun 22, 11:50 AM