The viewport may update at 0 FPS while navigating, until the mouse is released. #94963

New Issue

Kai-wei · 2022-01-16T22:35:45+01:00

Kai-wei commented

2022-01-16 22:35:45 +01:00

System Information
Operating system: Windows 10
Graphics card: RTX 3080 Ti

Blender Version
Broken: 3.0.0
Worked: 2.92.0

Short description of error
When working in sculpt mode on a model with multires modifier, the viewport may update at 0 FPS while navigating, until the mouse is released.

Usually when navigating in sculpt mode on a model with multires modifier, the model will switch to a low poly version while navigating. When this bug is happening, the viewport remains frozen and the high poly model remain on screen until mouse is released.

The bug will be temporarily fixed upon clicking on another application or resizing the blender window.

Exact steps for others to reproduce the error

Shift+A to create a plane
Ctrl+E and subdivide it 4 times.
Attach multires modifier onto the plane.
Subdivide it 6 times with the multires modifier.
Use sculpt mode and sculpt without moving the view for around 1~2 minutes (I used a wacom tablet. Using the sculptDraw brush, I added / subtracted (hold ctrl) from the mesh, also using smoothing brush (hold shift) to smooth certain parts, and undo (ctrl + z) multiple times to simulate a normal working environment.)
Try to pan or rotate the view around.

I found another way to trigger this bug, and it's not strictly related to sculpt mode.
(Tested on blender 3.1.0 beta 03b57d3973)

Click around with a Wacom tablet.
Pan the camera around with a Wacom tablet.
Pan the camera around with a mouse.

sculpt mode bug.blend

2022-01-17 04-48-11_Trim.mp4

**System Information** Operating system: Windows 10 Graphics card: RTX 3080 Ti **Blender Version** Broken: 3.0.0 Worked: 2.92.0 **Short description of error** When working in sculpt mode on a model with multires modifier, the viewport may update at 0 FPS while navigating, until the mouse is released. Usually when navigating in sculpt mode on a model with multires modifier, the model will switch to a low poly version while navigating. When this bug is happening, the viewport remains frozen and the high poly model remain on screen until mouse is released. The bug will be temporarily fixed upon clicking on another application or resizing the blender window. **Exact steps for others to reproduce the error** 1. Shift+A to create a plane 2. Ctrl+E and subdivide it 4 times. 3. Attach multires modifier onto the plane. 4. Subdivide it 6 times with the multires modifier. 5. Use sculpt mode and sculpt without moving the view for around 1~2 minutes (I used a wacom tablet. Using the sculptDraw brush, I added / subtracted (hold ctrl) from the mesh, also using smoothing brush (hold shift) to smooth certain parts, and undo (ctrl + z) multiple times to simulate a normal working environment.) 6. Try to pan or rotate the view around. **I found another way to trigger this bug, and it's not strictly related to sculpt mode.** (Tested on blender 3.1.0 beta 03b57d3973) 1. Click around with a Wacom tablet. 2. Pan the camera around with a Wacom tablet. 3. Pan the camera around with a mouse. [sculpt mode bug.blend](https://archive.blender.org/developer/F12807542/sculpt_mode_bug.blend) [2022-01-17 04-48-11_Trim.mp4](https://archive.blender.org/developer/F12807550/2022-01-17_04-48-11_Trim.mp4)

Kai-wei commented

2022-01-16 22:35:45 +01:00

Added subscriber: @Nimbkoll

blender-admin commented

2022-01-16 22:35:45 +01:00

#99780 was marked as duplicate of this issue

blender-admin commented

2022-01-16 22:35:45 +01:00

#94073 was marked as duplicate of this issue

Pratik Borhade commented

2022-01-17 04:46:40 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-01-17 04:46:40 +01:00

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

Pratik Borhade commented

2022-01-17 04:46:40 +01:00

Hi, Thanks for the report. Unable to reproduce on 3.1.0 (34d424fd64bb)

Are you able to replicate on this file?
#94963.blend

I used a wacom tablet.

Doesn't this happen when you pan or rotate with mouse?

Hi, Thanks for the report. Unable to reproduce on 3.1.0 (`34d424fd64bb`) Are you able to replicate on this file? [#94963.blend](https://archive.blender.org/developer/F12807900/T94963.blend) > I used a wacom tablet. Doesn't this happen when you pan or rotate with mouse?

Pratik Borhade commented

2022-01-18 08:22:54 +01:00

Added subscriber: @ppuskas

Kai-wei commented

2022-01-18 17:41:22 +01:00

In #94963#1289060, @PratikPB2123 wrote:

I used a wacom tablet.

Doesn't this happen when you pan or rotate with mouse?

I use a wacom tablet to sculpt on the model, and I use a mouse to navigate the view.

I will try and replicate the bug on the file you provided.

> In #94963#1289060, @PratikPB2123 wrote: >> I used a wacom tablet. > Doesn't this happen when you pan or rotate with mouse? I use a wacom tablet to sculpt on the model, and I use a mouse to navigate the view. I will try and replicate the bug on the file you provided.

Kai-wei commented

2022-01-18 18:19:05 +01:00

Here's the bug reproduced with blender 3.0.0, from opening the file you provided to it happening. It happened on around the 4 minute mark.

(I use a wacom tablet to sculpt on the model, and I use a mouse to navigate the view.)
2022-01-19 01-00-20.mp4

Here's the bug reproduced with blender 3.0.0, from opening the file you provided to it happening. It happened on around the 4 minute mark. (I use a wacom tablet to sculpt on the model, and I use a mouse to navigate the view.) [2022-01-19 01-00-20.mp4](https://archive.blender.org/developer/F12810308/2022-01-19_01-00-20.mp4)

Kai-wei commented

2022-01-27 08:14:33 +01:00

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

Kai-wei commented

2022-01-30 04:22:36 +01:00

Tested on blender 3.1.0 beta 03b57d3973

I found another way to trigger this bug.

Click around with a Wacom tablet.
Pan the camera around with a Wacom tablet.
Pan the camera around with a mouse.

2022-01-30 11-17-29.mp4

Tested on blender 3.1.0 beta 03b57d3973 I found another way to trigger this bug. 1. Click around with a Wacom tablet. 2. Pan the camera around with a Wacom tablet. 3. Pan the camera around with a mouse. [2022-01-30 11-17-29.mp4](https://archive.blender.org/developer/F12834951/2022-01-30_11-17-29.mp4)

Pratik Borhade commented

2022-01-30 05:56:36 +01:00

Added subscriber: @PrototypeNM1

Pratik Borhade commented

2022-01-30 05:56:36 +01:00

Hi @PrototypeNM1 , are you able to confirm this behavior?

Nicholas Rishel self-assigned this 2022-02-13 00:44:55 +01:00

Nicholas Rishel commented

2022-02-13 00:44:55 +01:00

Just a guess but I'm thinking the issue is we're somehow not counting button presses correctly.

Pratik Borhade commented

2022-02-25 17:51:13 +01:00

@PrototypeNM1 hi, I see you claimed the task. That means you are able to reproduce?

Philipp Oeser commented

2022-03-28 15:05:30 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-03-28 15:05:30 +02:00

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

Philipp Oeser commented

2022-03-28 15:05:30 +02:00

In #94963#1314043, @PratikPB2123 wrote:
@PrototypeNM1 hi, I see you claimed the task. That means you are able to reproduce?

same here ( asking myself if you could reproduce @PrototypeNM1 )

> In #94963#1314043, @PratikPB2123 wrote: > @PrototypeNM1 hi, I see you claimed the task. That means you are able to reproduce? same here ( asking myself if you could reproduce @PrototypeNM1 )

Nicholas Rishel commented

2022-05-01 07:14:33 +02:00

@Nimbkoll Can you run the current nightly from command line with the argument blender.exe --debug-wintab, recreate the bug, and copy the command line output here, and link the resulting paste to this report?

(For posterity, iirc @PratikPB2123, @lichtwerk, and I have discussed reproducibility of Wintab bugs in either other bug reports or in blender chat. Please ping me in blender.chat if I'm not remembering correctly)

@Nimbkoll Can you run the current nightly from command line with the argument `blender.exe --debug-wintab`, recreate the bug, and copy the command line output [here](https://developer.blender.org/paste/edit/form/default/), and link the resulting paste to this report? (For posterity, iirc @PratikPB2123, @lichtwerk, and I have discussed reproducibility of Wintab bugs in either other bug reports or in blender chat. Please ping me in blender.chat if I'm not remembering correctly)

Nicholas Rishel commented

2022-05-01 07:14:54 +02:00

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

Kai-wei commented

2022-05-12 14:07:28 +02:00

In #94963#1349671, @PrototypeNM1 wrote:
@Nimbkoll Can you run the current nightly from command line with the argument blender.exe --debug-wintab, recreate the bug, and copy the command line output here, and link the resulting paste to this report?

(For posterity, iirc @PratikPB2123, @lichtwerk, and I have discussed reproducibility of Wintab bugs in either other bug reports or in blender chat. Please ping me in blender.chat if I'm not remembering correctly)

https://developer.blender.org/P2940

Here's the command line output, I recreated the bug, and then quit blender right afterwards. It was done with 3.3.0 Alpha (8d9d5da137)

> In #94963#1349671, @PrototypeNM1 wrote: > @Nimbkoll Can you run the current nightly from command line with the argument `blender.exe --debug-wintab`, recreate the bug, and copy the command line output [here](https://developer.blender.org/paste/edit/form/default/), and link the resulting paste to this report? > > (For posterity, iirc @PratikPB2123, @lichtwerk, and I have discussed reproducibility of Wintab bugs in either other bug reports or in blender chat. Please ping me in blender.chat if I'm not remembering correctly) https://developer.blender.org/P2940 Here's the command line output, I recreated the bug, and then quit blender right afterwards. It was done with 3.3.0 Alpha (8d9d5da13706)

Kai-wei commented

2022-05-12 14:07:41 +02:00

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

Pratik Borhade commented

2022-07-18 03:46:02 +02:00

Added subscriber: @vaughmj1

Philipp Oeser removed the

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The viewport may update at 0 FPS while navigating, until the mouse is released. #94963