Erratic pen pressure #92436

New Issue

Jason Klee · 2021-10-23T16:00:57+02:00

Jason Klee commented

2021-10-23 16:00:57 +02:00

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.12

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-10-22 22:32, hash: 231d66d8ba
Worked: 2.93.4

Short description of error
Tablet pen pressure is erratic in both sculpting and grease pencil. occasionally pressure seems to be 100%
using xp-pen star 06, windows ink turned off in tablet settings. changing tablet API in blender doesn't help.
This doesn't happen in krita or in Blender 2.93.4.

Exact steps for others to reproduce the error

create a plane and subdivide for sufficient resolution for sculpting
sculpt lightly on the mesh. occasionally the problem will present itself.

OR:

Create new 2D animation (CTRL N -> 2D Animation, or File New 2D Animation)
draw light strokes. occasionally the problem will present itself.

**System Information** Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.12 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-10-22 22:32, hash: `231d66d8ba` Worked: 2.93.4 **Short description of error** Tablet pen pressure is erratic in both sculpting and grease pencil. occasionally pressure seems to be 100% using xp-pen star 06, windows ink turned off in tablet settings. changing tablet API in blender doesn't help. This doesn't happen in krita or in Blender 2.93.4. **Exact steps for others to reproduce the error** 1. create a plane and subdivide for sufficient resolution for sculpting 2. sculpt lightly on the mesh. occasionally the problem will present itself. OR: 1. Create new 2D animation (CTRL N -> 2D Animation, or File New 2D Animation) 2. draw light strokes. occasionally the problem will present itself.

Jason Klee commented

2021-10-23 16:00:57 +02:00

Added subscriber: @jasonklee

Richard Antalik commented

2021-10-27 07:16:30 +02:00

Added subscribers: @PrototypeNM1, @iss

Richard Antalik commented

2021-10-27 07:16:30 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2021-10-27 07:16:30 +02:00

@jasonklee can you provide screenshot/recording of how this issue exhibits?

@PrototypeNM1 does this ring a bell?

@jasonklee can you provide screenshot/recording of how this issue exhibits? @PrototypeNM1 does this ring a bell?

Nicholas Rishel self-assigned this 2021-10-27 08:20:41 +02:00

Nicholas Rishel commented

2021-10-27 08:20:41 +02:00

Is pen pressure 100% for the full stroke when this happens, or just part of it? A screenshot of the issue would help narrow down the problem.

Jason Klee commented

2021-11-01 13:25:07 +01:00

it's the full stroke. here is a video of the problem. the first 3 strokes are affected, then it works normally for a while then it happens several more times. https://www.youtube.com/watch?v=_EKENK46o-0

Nicholas Rishel commented

2021-11-01 18:56:44 +01:00

Thanks for the video. The cause of this issue relates to #89341 (fixing it will hide the problem).

I'll need to put together some tests to better understand what your tablet is doing.

Thanks for the video. The cause of this issue relates to #89341 (fixing it will hide the problem). I'll need to put together some tests to better understand what your tablet is doing.

Jason Klee commented

2021-11-03 17:06:09 +01:00

You're welcome. Just to clarify, my tablet is not in mouse mode as I think #89341 would suggest. Also, I've discovered that when I use "Windows Ink" in my tablet driver, the problem seems to be gone, but windows ink introduces other problems system wide. Hopefully this helps you somehow.

Nicholas Rishel commented

2021-11-03 17:23:32 +01:00

Thanks for clarifying, it was more a note to self as I know the code causing the problem. :)

Nicholas Rishel commented

2021-11-24 02:45:25 +01:00

The symptoms of this issue should be resolved by 60c0b79256, but there remains an underlying issue that needs further investigation. Lack of pen pressure was an indicator that Wintab was falling back to low frequency input, which can result in jagged lines when drawing.

The symptoms of this issue should be resolved by 60c0b7925625, but there remains an underlying issue that needs further investigation. Lack of pen pressure was an indicator that Wintab was falling back to low frequency input, which can result in jagged lines when drawing.

Nicholas Rishel commented

2021-11-24 02:45:42 +01:00

Changed status from 'Needs User Info' to: 'Confirmed'

Nicholas Rishel commented

2022-05-09 00:48:04 +02:00

@jasonklee could you repeat the bug by running blender.exe --debug-wintab with this build, copy the system console to this link, and link the paste in a reply to this report?

Just a note: this bug report doesn't happen in the main release of Blender because of fallback that is hiding it. We'd still like to fix this properly because the fallback causes jagged lines when drawing.

@jasonklee could you repeat the bug by running `blender.exe --debug-wintab` with [this build](https:*builder.blender.org/download/experimental/blender-3.3.0-alpha+wintab.6abc638a8b90-windows.amd64-release.zip), copy the system console [to this link](https:*developer.blender.org/paste/edit/form/default/), and link the paste in a reply to this report? Just a note: this bug report doesn't happen in the main release of Blender because of fallback that is hiding it. We'd still like to fix this properly because the fallback causes jagged lines when drawing.

Nicholas Rishel commented

2022-05-09 00:48:11 +02:00

Changed status from 'Confirmed' to: 'Needs User Info'

Jason Klee commented

2022-05-15 18:22:45 +02:00

https://developer.blender.org/P2946

Hope it helps.

https://developer.blender.org/P2946 Hope it helps.

Jason Klee commented

2022-05-15 18:28:17 +02:00

here is another without loading previous preferences just in case.

https://developer.blender.org/P2947

here is another without loading previous preferences just in case. https://developer.blender.org/P2947

Nicholas Rishel commented

2022-05-21 18:53:34 +02:00

@jasonklee Could you try this build, and if things are still broken then same instructions as before for getting the log.

Note for self: this build tests if using PK_CHANGED filters invalid data.

@jasonklee Could you try [this build](https://builder.blender.org/download/experimental/blender-3.3.0-alpha+wintab.2ffd8cfd3a9d-windows.amd64-release.zip), and if things are still broken then same instructions as before for getting the log. Note for self: this build tests if using PK_CHANGED filters invalid data.

Nicholas Rishel commented

2022-05-29 20:02:48 +02:00

@jasonklee quick ping if you're still available to test the prior build; heads up that we normally close tasks that go without reply for a week.

Richard Antalik commented

2022-06-24 19:36:28 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Richard Antalik closed this issue

2022-06-24 19:36:28 +02:00

Richard Antalik commented

2022-06-24 19:36:28 +02:00

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed.

Thanks again for the report. If the problem persists please open a new report with the required information.

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed. Thanks again for the report. If the problem persists please open a new report with the required information.

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Erratic pen pressure #92436