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Maniphest T70661

Cycles in viewport stuck on initializing indefinitely
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Description

System Information
Operating system: Linux-4.15.0-64-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 1050/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.116

Blender Version
Broken: version: 2.81 (sub 14), branch: master, commit date: 2019-10-08 22:16, hash: rB0812949bbc3d

Cycles display mode in viewport doesn't work, progress says "initializing" indefinitely with no cpu/gpu consumption and rendering never begins. (seems to be scene specific so i have attached a somewhat stripped version of a real project which triggers the bug)

stripped scene for bug report.blend111 MBDownload

Open the attached .blend file, set the top right viewport to "rendered" mode.
On my machine, rendering never begins.

Related Objects

Event Timeline

Matthew Wiebe (cerebral_malfunction) created this task.Oct 9 2019, 3:31 AM
Brecht Van Lommel (brecht) changed the task status from Unknown Status to Resolved.Oct 9 2019, 1:25 PM
Brecht Van Lommel (brecht) claimed this task.
Brecht Van Lommel (brecht) added a subscriber: Brecht Van Lommel (brecht).

Fixed by rB340b9c1dfc6e81efc0fb1e1ffff78203ba6aeddc

Roman Muradov (bluebed) added a subscriber: Roman Muradov (bluebed).Jan 22 2022, 6:20 PM

Is there a resolution to this?
I have the same strange thing (blender 3.0), every now and then the file gets stuck on initializing in cycles and either takes ages, or (most commonly) doesn't render at all. I'm on PC. Tried switching to CPU, etc, nothing helps except reverting to an earlier version--seems to happen apropos of nothing, and I can't find anything about this online. Eevee renders just fine.