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System Information
Operating system: Windows-10-10.0.16299 64 Bits
Graphics card: GeForce GTX 960M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 369.09

Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-07-05 06:13, hash: rB66684bdff30f
Worked: (optional)

Short description of error
Freezing of Blender interface for exactly 10-15 seconds time to time regardless of the memory load of the task just before the freeze of interface

Exact steps for others to reproduce the error

1)A plane is textured by shader editor.
2)Evee render is used on Lookdev with scene lights and scene HDRI or lookdev HDRI
3)Node editor window added. All the connections are made and node connections created
4)Shader compilation is completed (no freeze)
5)Changes in nodes made in material glossiness etc, ,
Then, viewport updated with a little time taken for Shader complilation but without freeze, (normal)
6)**Nodes for the materials were being arranged (A node is grabbed to move its position)

Blender UI Freezed for 10 seconds with the mouse arrow in ''loading'' state (bug)
After 10 seconds, everything get back to Normal.**


  1. Almost every 30 minutes, regardless of task applied right before, it freezes exactly 10-15 seconds

Note: It freezes mostly when Eveee 3d viewport is open, but not right after big tasks/change in values, but it freezes like a chronical freeze.



Event Timeline

This happens to me as well,

System Information
Operating system: Windows-10-10.0.15063 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.35

Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-07-01 15:48, hash: rBdcf520cdad79

In more complex scenes, while in lookdev or rendered eevee modes blender freezes for about 10-15s seemingly at random intervals. E.g. when just zooming the view in and out for a minute with the mouse wheel the screen freezes for a bit. Then the view jumps, catching up with some of the inputs made at the start of the freeze if there were any.

Also spotted in a blenderguru tutorial (video link starts at the freeze)

2 other similar bugs have popped up recently right after Blender Guru released his video: T66490 and T66577

The first one may have a workaround that could be worth trying to at least confirm here.

Brecht Van Lommel (brecht) closed this task as Archived.
Brecht Van Lommel (brecht) claimed this task.

This graphics driver is too old, you need the latest driver from the NVIDIA website.

If the issue persists after that, please submit a new bug report, provide a .blend file, and don't write the title in all caps.