Texture flickering when selecting in solid viewport / AMD Navi RX 5700 series #69377

New Issue

Andreas Lutsch · 2019-09-01T13:38:24+02:00

Andreas Lutsch commented

2019-09-01 13:38:24 +02:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: AMD Radeon RX 5700 XT ATI Technologies Inc. 4.5.13571 Core Profile Context 19.8.2 26.20.13001.40003

Blender Version
Broken: version: 2.81 (sub 4), branch: master, commit date: 2019-09-01 07:31, hash: ae43b1d51b
Worked: 2.80 Stable

Short description of error
The texture flickers in solid viewport shading with texture on while selecting with circle select in vertex or edge mode.

6QEmPJq0ZS.mp4

Also if you use a mirror modifier (or probably other modifiers too) even with any type of selection the texture flickers.

xf4IPvcr8R.mp4

Exact steps for others to reproduce the error

Create a texture and draw something on the basic cube
Go into edit mode and turn on texture in solid viewport shading
Use the circle select tool and change from vertex to edge mode when selecting.

cube.blend

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: AMD Radeon RX 5700 XT ATI Technologies Inc. 4.5.13571 Core Profile Context 19.8.2 26.20.13001.40003 **Blender Version** Broken: version: 2.81 (sub 4), branch: master, commit date: 2019-09-01 07:31, hash: `ae43b1d51b` Worked: 2.80 Stable **Short description of error** The texture flickers in solid viewport shading with texture on while selecting with circle select in vertex or edge mode. [6QEmPJq0ZS.mp4](https://archive.blender.org/developer/F7712872/6QEmPJq0ZS.mp4) Also if you use a mirror modifier (or probably other modifiers too) even with any type of selection the texture flickers. [xf4IPvcr8R.mp4](https://archive.blender.org/developer/F7712873/xf4IPvcr8R.mp4) **Exact steps for others to reproduce the error** 1. Create a texture and draw something on the basic cube 2. Go into edit mode and turn on texture in solid viewport shading 3. Use the circle select tool and change from vertex to edge mode when selecting. [cube.blend](https://archive.blender.org/developer/F7712869/cube.blend)

Andreas Lutsch commented

2019-09-01 13:38:24 +02:00

Added subscriber: @AndreasLutsch

noki paike commented

2019-09-01 14:01:01 +02:00

Added subscriber: @nokipaike

noki paike commented

2019-09-01 14:01:01 +02:00

I have an AMD radeon HD 7600 on windows 10 (gpu with legacy drivers and workarounds) and I don't have this flickering, it seems that it works well

Andreas Lutsch commented

2019-09-01 15:17:41 +02:00

@nokipaike Did you try on the latest 2.81 build? It works for me well too on the 2.80 stable release, but on the nightly build, I get this weird issues. Try the cube I uploaded here with nightly 2.81, maybe add a mirror modifier, and change the vertex/edge/face selection while selecting and deselecting.

noki paike commented

2019-09-01 15:58:24 +02:00

@AndreasLutsch yes I only investigated blender 2.81, usually only check in the latest builds, and in the case, in official builds check if bugs existed before

here i think i know what happens, in my gpu it works because there are workarounds (same blender 2.80 code), while in your gpu, changes have been made somewhere that trigger this bug.

@AndreasLutsch yes I only investigated blender 2.81, usually only check in the latest builds, and in the case, in official builds check if bugs existed before here i think i know what happens, in my gpu it works because there are workarounds (same blender 2.80 code), while in your gpu, changes have been made somewhere that trigger this bug.

Andreas Lutsch commented

2019-09-01 18:00:47 +02:00

You're right, it seems I have this bug only on my PC with the AMD RX 5700 XT, on my laptop with Intel UHD 620 I don't have this issue.

Andreas Lutsch changed title from ~~Texture flickering when selecting~~ to Texture flickering when selecting in solid viewport / AMD Navi RX 5700 series

2019-09-09 09:45:48 +02:00

Andreas Lutsch commented

2019-09-09 12:21:50 +02:00

Here is my system info and gpu debug of blender.

system-info.txt

GPU Debug.txt

Here is my system info and gpu debug of blender. [system-info.txt](https://archive.blender.org/developer/F7726737/system-info.txt) [GPU Debug.txt](https://archive.blender.org/developer/F7726736/GPU_Debug.txt)

Jeroen Bakker commented

2019-09-12 14:13:44 +02:00

Added subscriber: @Jeroen-Bakker

Jeroen Bakker commented

2019-09-12 14:18:27 +02:00

Hi @AndreasLutsch

I am not able to reproduce this issue yet. Could you in the meantime update your graphics drivers to the latest version and see if that solves you problem?

Hi @AndreasLutsch I am not able to reproduce this issue yet. Could you in the meantime update your graphics drivers to the latest version and see if that solves you problem?

Jeroen Bakker self-assigned this 2019-09-12 14:22:13 +02:00

Jeroen Bakker commented

2019-09-12 14:22:13 +02:00

Aw wait am able to reproduce it on Linux with an AMD Vega 64.

Jeroen Bakker commented

2019-09-12 14:56:10 +02:00

First bad commit is c3d037e88f
Other issue that might be related is

switching rendering engines during circle select doesn't render textures.

First bad commit is c3d037e88f Other issue that might be related is * switching rendering engines during circle select doesn't render textures.

Andreas Lutsch commented

2019-09-12 23:39:47 +02:00

Could you in the meantime update your graphics drivers to the latest version and see if that solves you problem?

The newest driver 19.9.2 with the latest 2.81 build still has the issue.

> Could you in the meantime update your graphics drivers to the latest version and see if that solves you problem? The newest driver 19.9.2 with the latest 2.81 build still has the issue.

Clément Foucault commented

2019-09-27 15:28:04 +02:00

Added subscriber: @fclem

Clément Foucault commented

2019-09-27 15:28:04 +02:00

Ok the bug is caused by glBufferData inside DRW_instance_buffer_finish > GPU_vertbuf_use but only after the selection code which resets the number of items in idatalist->pool_buffers.
I don't understand why this is happening as the vbo ids are all valid and no error is reported. What is even more strange, is that it affects another vbo which has no connection with the ones in DRW_instance_buffer_finish.

I will commit a workaround, but this bug might appear again from somewhere else (I couldn't figure a way to when I tried).

Ok the bug is caused by `glBufferData` inside `DRW_instance_buffer_finish > GPU_vertbuf_use` but only after the selection code which resets the number of items in `idatalist->pool_buffers`. I don't understand why this is happening as the vbo ids are all valid and no error is reported. What is even more strange, is that it affects another vbo which has no connection with the ones in DRW_instance_buffer_finish. I will commit a workaround, but this bug might appear again from somewhere else (I couldn't figure a way to when I tried).

blender-admin commented

2019-09-27 15:31:03 +02:00

This issue was referenced by df3891ed81

This issue was referenced by df3891ed817ff7b4bc8ba1c4c313f0fc2df8eb1f

Clément Foucault commented

2019-09-27 15:38:05 +02:00

Changed status from 'Open' to: 'Resolved'

Clément Foucault closed this issue

2019-09-27 15:38:05 +02:00

Andreas Lutsch commented

2019-09-28 09:50:06 +02:00

There are still some issues when using the mirror modifier, when you turn off adjust on cage, the issue is present, but with both displaying modifier in edit mode and adjust on cage, it's fine.

DqKgVT7p27.mp4

There are still some issues when using the mirror modifier, when you turn off adjust on cage, the issue is present, but with both displaying modifier in edit mode and adjust on cage, it's fine. [DqKgVT7p27.mp4](https://archive.blender.org/developer/F7778329/DqKgVT7p27.mp4)

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Texture flickering when selecting in solid viewport / AMD Navi RX 5700 series #69377