Tablet Pressure not working in New Window #93323

New Issue

Adam Cantrell · 2021-11-23T10:04:48+01:00

Adam Cantrell commented

2021-11-23 10:04:48 +01:00

System Information
Operating system: Windows 10 20H1
Graphics card: Nvidia 2070 8G
Drawing Tablet: Huion Kamvas 16 Pro 2019
system-info.txt

Blender Version
Broken: 2.92.0 and 2.93.6

Short description of error
Pen pressure not working on newly created window. Very repeatable.

The steps outlined bellow as well as the attached video evidence prove that the Tablet Pen is working In blender just not on the newly created window.

Exact steps for others to reproduce the error

Open Blender
Open Project
Create new Window from Main View
Move New window to Kamvas 16 Tablet
Use tablet pen to paint the mask.
Pressure does not work.
Verify by toggling Pen pressure button in radius and strength fields.
Use tablet pen again to verify
Pressure still not working.
Close The window on the Kamvas Tablet.
Move Main Window to Kamvas Tablet.
Use tablet pen to paint the mask.

Pressure is working.

Expected behavior would be that the pressure works in the newly created window.

**System Information** Operating system: Windows 10 20H1 Graphics card: Nvidia 2070 8G Drawing Tablet: Huion Kamvas 16 Pro 2019 [system-info.txt](https://archive.blender.org/developer/F11917178/system-info.txt) **Blender Version** Broken: 2.92.0 and 2.93.6 **Short description of error** Pen pressure not working on newly created window. Very repeatable. The steps outlined bellow as well as the attached video evidence prove that the Tablet Pen is working In blender just not on the newly created window. <video src="https://archive.blender.org/developer/F11882738/2021-11-23_03-52-41.mkv" title="2021-11-23 03-52-41.mkv" controls></video> **Exact steps for others to reproduce the error** - Open Blender - Open Project - Create new Window from Main View - Move New window to Kamvas 16 Tablet - Use tablet pen to paint the mask. - **Pressure does not work.** - Verify by toggling Pen pressure button in radius and strength fields. - Use tablet pen again to verify - **Pressure still not working.** - Close The window on the Kamvas Tablet. - Move Main Window to Kamvas Tablet. - Use tablet pen to paint the mask. # Pressure is working. Expected behavior would be that the pressure works in the newly created window.

Adam Cantrell commented

2021-11-23 10:04:48 +01:00

Added subscriber: @adamc1228

Adam Cantrell commented

2021-11-23 20:51:47 +01:00

With a fresh restart of my computer and fresh eyes, I can confirm that the default scene exhibits this behavior and that it does not appear project specific.

Results of additional Testing:

Fresh PC Boot
Fresh Launch of Blender
Shift Drag to create new window from main view-port.
Move the new window to the Kamvas Tablet.
Do not Load Existing Project and Use default scene
Switch Main view port to Texture Paint
Press N to open right pane
Click Tool
Click + to add texture slot of type "Basic Color"
Proceed with Defaults
Enable Pressure for Radius and Strength
Select a color in the color picker
Use Tablet Pen to Draw mask.
Pressure not working.

If you repeat the process and omit step 3 and drag the main window to the Kamvas tablet instead, then the pressure works. This testing was done with the default scene and cube. During this additional testing I think I can make out what is the inner ring that indicates the pressure but it appears to instantly snap to maximum radius of the brush. The best I can relate this behavior to is that it is treating the tablet input on the new window as a mouse click which would use the the max radius we defined.

With a fresh restart of my computer and fresh eyes, I can confirm that the default scene exhibits this behavior and that it does not appear project specific. Results of additional Testing: - Fresh PC Boot - Fresh Launch of Blender - Shift Drag to create new window from main view-port. - Move the new window to the Kamvas Tablet. - Do not Load Existing Project and Use default scene - Switch Main view port to Texture Paint - Press N to open right pane - Click Tool - Click + to add texture slot of type "Basic Color" - Proceed with Defaults - Enable Pressure for Radius and Strength - Select a color in the color picker - Use Tablet Pen to Draw mask. - Pressure not working. If you repeat the process and omit step 3 and drag the main window to the Kamvas tablet instead, then the pressure works. This testing was done with the default scene and cube. During this additional testing I think I can make out what is the inner ring that indicates the pressure but it appears to instantly snap to maximum radius of the brush. The best I can relate this behavior to is that it is treating the tablet input on the new window as a mouse click which would use the the max radius we defined.

Nicholas Rishel commented

2021-11-24 02:49:25 +01:00

Added subscriber: @PrototypeNM1

Nicholas Rishel commented

2021-11-24 02:49:25 +01:00

Could you check if the issue is present in Blender 3.0?

Adam Cantrell commented

2021-11-24 07:13:02 +01:00

I can confirm that Blender 3.0.0 beta available for download (Beta November 24, 02:41:54 - v30 - 3844e9dbe7 - zip) exhibits the same issue. Interestingly, the inner ring to indicate pressure, is constantly cycling (visually) from tiny to large as I paint but continues to operate as if 100% pressure is applied all the time as in blender 2.92 and 2.93.6 in the new window.

I can confirm that Blender 3.0.0 beta available for download **(Beta November 24, 02:41:54 - v30 - 3844e9dbe771 - zip)** exhibits the same issue. Interestingly, the inner ring to indicate pressure, is constantly cycling (visually) from tiny to large as I paint but continues to operate as if 100% pressure is applied all the time as in blender 2.92 and 2.93.6 in the new window.

Nicholas Rishel self-assigned this 2021-12-04 04:39:33 +01:00

Nicholas Rishel commented

2021-12-04 04:39:33 +01:00

There's a common driver bug where the tablet sends input to the wrong window. When I get a down moment I'll add some logging to check if that's the case.

Philipp Oeser commented

2022-01-21 11:43:20 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-01-21 11:43:20 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Philipp Oeser commented

2022-01-21 11:43:20 +01:00

Works fine for me here (but I am on Linux, single monitor with a Wacom Intuos 4, so I cant really "move the window to the tablet").

In #93323#1264475, @PrototypeNM1 wrote:
There's a common driver bug where the tablet sends input to the wrong window. When I get a down moment I'll add some logging to check if that's the case.

@PrototypeNM1 : did you get to adding the logging? How can we proceed here?

Works fine for me here (but I am on Linux, single monitor with a Wacom Intuos 4, so I cant really "move the window to the tablet"). > In #93323#1264475, @PrototypeNM1 wrote: > There's a common driver bug where the tablet sends input to the wrong window. When I get a down moment I'll add some logging to check if that's the case. @PrototypeNM1 : did you get to adding the logging? How can we proceed here?

Malinguaggi commented

2022-01-24 21:31:21 +01:00

Added subscriber: @Voguart

Malinguaggi commented

2022-01-24 21:31:21 +01:00

Hello friends,
I have a relatively similar problem with my Huion tablet.
Blender version 3.0
Huion kamvas pro 20 tablet with latest huion driver update.
System Windows 10, 64 Pro,
Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz 4.00GHz

The support of the latter and random in sculpt mode, once the stylus is lifted from the screen the test pattern of the stylus disappears, I have to press the screen more times with the stylus so that the pattern remains on the screen . This problem only occurs from Blender version 3.0.

Hello friends, I have a relatively similar problem with my Huion tablet. Blender version 3.0 Huion kamvas pro 20 tablet with latest huion driver update. System Windows 10, 64 Pro, Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz 4.00GHz The support of the latter and random in sculpt mode, once the stylus is lifted from the screen the test pattern of the stylus disappears, I have to press the screen more times with the stylus so that the pattern remains on the screen . This problem only occurs from Blender version 3.0.

Malinguaggi commented

2022-01-24 21:33:13 +01:00

This comment was removed by @Voguart

*This comment was removed by @Voguart*

Nicholas Rishel commented

2022-05-09 00:49:45 +02:00

Changed status from 'Needs Developer To Reproduce' to: 'Needs User Info'

Nicholas Rishel commented

2022-05-09 00:49:45 +02:00

@adamc1228 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?

@adamc1228 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?

Adam Cantrell commented

2022-05-13 02:44:22 +02:00

Thanks, I will download that and hopefully give it a try before the end of the weekend.

Nicholas Rishel commented

2022-05-21 18:48:10 +02:00

@adamc1228 Quick reminder for followup. :)

Adam Cantrell commented

2022-05-24 03:22:42 +02:00

Hi Nicholas,

Sorry for the delay. I have attached the link with the Console data as requested. Additionally, I recorded a short video of the test if that assists you. I would like to point out that my system specs have changed slightly since this was opened in December.

Changes;
Fresh Install Windows 11
GPU is now 3080.

2022-05-23 21-15-10.mkv

Console Paste

Hi Nicholas, Sorry for the delay. I have attached the link with the Console data as requested. Additionally, I recorded a short video of the test if that assists you. I would like to point out that my system specs have changed slightly since this was opened in December. Changes; Fresh Install Windows 11 GPU is now 3080. [2022-05-23 21-15-10.mkv](https://archive.blender.org/developer/F13101827/2022-05-23_21-15-10.mkv) [Console Paste](https://developer.blender.org/P2971)

Nicholas Rishel commented

2022-05-29 19:57:24 +02:00

Looking at the logs, it appears that the Wintab context recognizes that the window has changed, then keeps delivering events to the first window (paired with the Wintab context for the latter window). This is unambiguously a driver bug, but one we might be able to work around.

Given we've seen this same broken behavior for other drivers, I think I'll at least test an approach that would fix it. Just a heads up that If the "fix" breaks other devices we might have to write this off as a driver issue that we can't fix and we'll have to redirect to reporting the bug to the manufacturer.

Looking at the logs, it appears that the Wintab context recognizes that the window has changed, then keeps delivering events to the first window (paired with the Wintab context for the latter window). This is unambiguously a driver bug, but one we might be able to work around. Given we've seen this same broken behavior for other drivers, I think I'll at least test an approach that would fix it. Just a heads up that If the "fix" breaks other devices we might have to write this off as a driver issue that we can't fix and we'll have to redirect to reporting the bug to the manufacturer.

Nicholas Rishel commented

2022-05-29 19:59:40 +02:00

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

Philipp Oeser removed the

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Tablet Pressure not working in New Window #93323

Pressure is working.