Random vertices light up as if they were selected (but they're not) when I select one vertice at a time #77731

New Issue

Manu Järvinen · 2020-06-10T18:10:54+02:00

Manu Järvinen commented

2020-06-10 18:10:54 +02:00

System Information
Operating system: Linux-5.4.0-7634-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GeForce GTX 780 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.82

Blender Version
Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: 211b6c29f7

Short description of error

See the GIF above (sorry my mouse cursor didn't get recorded :(
so, in short, when I select one vertex and then select another, random vertices light up as if they're selected but they're not. Really annoying.
this happened to me in 2.82a as well (but only in Linux, not in Windows)

Exact steps for others to reproduce the error

load factory settings
subdivide the default cube 10 times, add subsurf modifier (CTRL+2), shade smooth
in EDIT mode, duplicate the mesh 6 or so times
select one vertex, select another vertex, the glitch seems to happen (like in the GIF above)

BLEND
mesh_glitches_bugreport.blend

**System Information** Operating system: Linux-5.4.0-7634-generic-x86_64-with-debian-bullseye-sid 64 Bits Graphics card: GeForce GTX 780 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.82 **Blender Version** Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: `211b6c29f7` **Short description of error** ![mesh_glitches_bugreport.gif](https://archive.blender.org/developer/F8606198/mesh_glitches_bugreport.gif) - See the GIF above (sorry my mouse cursor didn't get recorded :( - so, in short, when I select one vertex and then select another, random vertices light up as if they're selected but they're not. Really annoying. - this happened to me in 2.82a as well (but only in Linux, not in Windows) **Exact steps for others to reproduce the error** - load factory settings - subdivide the default cube 10 times, add subsurf modifier (CTRL+2), shade smooth - in EDIT mode, duplicate the mesh 6 or so times - select one vertex, select another vertex, the glitch seems to happen (like in the GIF above) **BLEND** [mesh_glitches_bugreport.blend](https://archive.blender.org/developer/F8606200/mesh_glitches_bugreport.blend)

Manu Järvinen commented

2020-06-10 18:10:54 +02:00

Added subscriber: @ManuJarvinen

Pablo Vazquez commented

2020-06-10 18:31:06 +02:00

Added subscriber: @pablovazquez

Pablo Vazquez commented

2020-06-10 18:31:06 +02:00

Can't reproduce in current master.


renderer:	'Quadro RTX 4000 with Max-Q Design/PCIe/SSE2'
vendor:		'NVIDIA Corporation'
version:	'4.5.0 NVIDIA 440.82'

Can't reproduce in current master. ```Linux 5.4.0-7634-generic #38~1591219791~20.04~6b1c5de-Ubuntu SMP Thu Jun 4 02:56:10 UTC 2 x86_64 x86_64 x86_64 GNU/Linux renderer: 'Quadro RTX 4000 with Max-Q Design/PCIe/SSE2' vendor: 'NVIDIA Corporation' version: '4.5.0 NVIDIA 440.82' ```

Pablo Vazquez commented

2020-06-10 18:31:13 +02:00

Removed subscriber: @pablovazquez

Manu Järvinen commented

2020-06-10 20:34:45 +02:00

Oh man :( Is it because of my GPU? We even have the same driver.
And this same issue happened to me in both Xubuntu and in Pop!_OS :(

Oh man :( Is it because of my GPU? We even have the same driver. And this same issue happened to me in both Xubuntu and in Pop!_OS :(

Philipp Oeser commented

2020-06-11 13:50:24 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-06-11 13:50:24 +02:00

Also cannot reproduce.

System Information
Operating system: Linux-5.5.13-200.fc31.x86_64-x86_64-with-fedora-31-Thirty_One 64 Bits
Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.64
version: 2.90.0 Alpha, branch: master, commit date: 2020-06-11 07:24, hash: 3f648f5b42 and 2.83 release

Also cannot reproduce. **System Information** Operating system: Linux-5.5.13-200.fc31.x86_64-x86_64-with-fedora-31-Thirty_One 64 Bits Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.64 version: 2.90.0 Alpha, branch: master, commit date: 2020-06-11 07:24, hash: `3f648f5b42` and 2.83 release

Germano Cavalcante commented

2020-06-12 16:58:21 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-06-12 16:58:21 +02:00

It also works fine here.
@ManuJarvinen, can you try the latest development snapshot of blender: https://builder.blender.org/download

Operating system: Windows-10-10.0.18941 64 Bits
Graphics card: Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.5.13586 Core Profile Context 19.50.01.05 26.20.15001.5006

It also works fine here. @ManuJarvinen, can you try the latest development snapshot of blender: https://builder.blender.org/download ---- **Operating system:** Windows-10-10.0.18941 64 Bits **Graphics card:** Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.5.13586 Core Profile Context 19.50.01.05 26.20.15001.5006

Manu Järvinen commented

2020-06-13 19:19:14 +02:00

@mano-wii , tried the latest 2.90, same issue :(
Here's a screenrecord of that: https://www.youtube.com/watch?v=r1miqKNnk-8

But it only happens on Linux builds for me, in Pop!_OS and in Xubuntu to be exact.

Damn, what is wrong with my machine :(

@mano-wii , tried the latest 2.90, same issue :( Here's a screenrecord of that: https://www.youtube.com/watch?v=r1miqKNnk-8 But it only happens on Linux builds for me, in Pop!_OS and in Xubuntu to be exact. Damn, what is wrong with my machine :(

Clément Foucault commented

2020-07-01 17:02:07 +02:00

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

Nick Gammon commented

2020-08-24 04:44:26 +02:00

Added subscriber: @nickgammon

Nick Gammon commented

2020-08-24 04:44:26 +02:00

That is definitely happening to me with Blender version 2.83.5.

My graphics card is: NVIDIA Corporation GK110 [GeForce GTX 780] (rev a1) - GeForce GTX 780/PCIe/SSE2
Operating system: Ubuntu 18.04.4 LTS

In addition to any vertices that are supposed to be selected, random other ones are coloured orange, white or black incorrectly.

Zooming changes the incorrect colours.
Going into Preferences -> Viewport and checking/unchecking virtually any option (eg. Object Info) triggers a redraw which causes different incorrect colouring.
Sometimes nothing is incorrectly coloured.
It is not consistent, that is zooming out and back in does not reproduce the same colouring of vertices.
Going from object to edit mode changes the incorrect vertices (if you keep going in and out of edit mode, changing nothing else, different incorrect vertices are coloured).
At any given moment multiple instances of white vertices, and orange vertices will be visible at once.
If you select all, then multiples instances of black vertices, and white vertices will be visible at once.
When I click to select one vertex, the object will flicker showing multiples different lots of incorrectly coloured vertices, before stabilizing into the final (incorrect) version. (I would say, at least one flicker before the final result, it happens quite fast).

Also happens with Blender 2.82.6

Does not happen with Blender 2.81.16.

With a cube subdivided 50 times (15,608 vertices) something like 20 to 30 vertices are incorrectly coloured. That is, a small percentage, usually clustered together. There can be multiple clusters.

It is, by the way, incredibly annoying. You can't tell what you have selected and what is randomly showing as selected when it isn't.

I made the above by editing the default cube and subdividing 50 times. Nothing else.

Having said all that, I cannot reproduce on another Ubuntu PC with the graphics card: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06)

That is definitely happening to me with Blender version 2.83.5. My graphics card is: NVIDIA Corporation GK110 [GeForce GTX 780] (rev a1) - GeForce GTX 780/PCIe/SSE2 Operating system: Ubuntu 18.04.4 LTS In addition to any vertices that are supposed to be selected, random other ones are coloured orange, white or black incorrectly. * Zooming changes the incorrect colours. * Going into Preferences -> Viewport and checking/unchecking virtually any option (eg. Object Info) triggers a redraw which causes different incorrect colouring. * Sometimes nothing is incorrectly coloured. * It is not consistent, that is zooming out and back in does not reproduce the same colouring of vertices. * Going from object to edit mode changes the incorrect vertices (if you keep going in and out of edit mode, changing nothing else, different incorrect vertices are coloured). * At any given moment multiple instances of white vertices, and orange vertices will be visible at once. * If you select all, then multiples instances of black vertices, and white vertices will be visible at once. * When I click to select one vertex, the object will flicker showing multiples different lots of incorrectly coloured vertices, before stabilizing into the final (incorrect) version. (I would say, at least one flicker before the final result, it happens quite fast). Also happens with Blender 2.82.6 Does **not** happen with Blender 2.81.16. With a cube subdivided 50 times (15,608 vertices) something like 20 to 30 vertices are incorrectly coloured. That is, a small percentage, usually clustered together. There can be multiple clusters. It is, by the way, incredibly annoying. You can't tell what you have selected and what is randomly showing as selected when it isn't. ![Screenshot from 2020-08-24 12-41-29.png](https://archive.blender.org/developer/F8807376/Screenshot_from_2020-08-24_12-41-29.png) I made the above by editing the default cube and subdividing 50 times. Nothing else. --- Having said all that, I cannot reproduce on another Ubuntu PC with the graphics card: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06)

Nick Gammon commented

2020-08-24 05:37:02 +02:00

Further testing shows that it works correctly with the X.Org X server driver, but not various versions of the NVIDIA drivers, see below.

However I think you need the NVIDIA driver to get the GPU Compute option for rendering.

Also, the problem (when it occurs) happens under Eevee and also Cycles. Interestingly, if you have Cycles selected, and Viewport Shading set to Rendered (with 32 samples) then in edit mode the incorrect pixels are displayed (differently) 32 times - once for each render pass.

It seems odd (to me) that Blender renders 32 passes of an object when it is in edit mode. Perhaps that is just because the whole window is redrawn 32 times, whether or not some objects are in edit mode.

However as I said above, the problem did not occur in Blender 2.81.16. So this is not simply a graphics card problem.

Further testing shows that it works correctly with the X.Org X server driver, but not various versions of the NVIDIA drivers, see below. ![Screenshot from 2020-08-24 13-20-04.png](https://archive.blender.org/developer/F8807514/Screenshot_from_2020-08-24_13-20-04.png) However I think you need the NVIDIA driver to get the GPU Compute option for rendering. Also, the problem (when it occurs) happens under Eevee and also Cycles. Interestingly, if you have Cycles selected, and Viewport Shading set to Rendered (with 32 samples) then **in edit mode** the incorrect pixels are displayed (differently) 32 times - once for each render pass. It seems odd (to me) that Blender renders 32 passes of an object when it is in edit mode. Perhaps that is just because the whole window is redrawn 32 times, whether or not some objects are in edit mode. However as I said above, the problem did not occur in Blender 2.81.16. So this is not simply a graphics card problem.

Nick Gammon commented

2020-08-24 05:42:01 +02:00

The problem persists with the 23 August 2020 Beta version: blender-2.90.0-ebf10b72b05f-linux64.tar.xz