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Maniphest T65815

Viewport Randomly Stops Rendering.
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Description

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.91

Blender Version
Broken: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-14 00:12, hash: rB8ac0fef4dfd1
Worked: (optional)

Short description of error
Blender 2.8 randomly stops viewport rendering. The top left says "Cancel"
I'm using Cycles

Exact steps for others to reproduce the error
(Sometimes it works) Make a scene in Blender, use the viewport rendering, wait for this to happen:

Event Timeline

Michael (BlenderGenius) created this task.Jun 14 2019, 8:35 PM
Brecht Van Lommel (brecht) lowered the priority of this task from 90 to 30.Jun 15 2019, 12:22 PM
Brecht Van Lommel (brecht) added a subscriber: Brecht Van Lommel (brecht).

We need a .blend file and exact steps to reproduce the problem.

Michael (BlenderGenius) added a comment.Jun 15 2019, 9:42 PM

All my . Blends do this but here is the most recent one. I don't know if it is just my GPU doing this or if it a reoccurring bug.

Grass.blend24 MBDownload

Update: When I do try to do a final render there is a message saying "CUDA error at C=cuCtxCreate: Launch failed"

Brecht Van Lommel (brecht) changed the task status from Unknown Status to Unknown Status.Jun 17 2019, 6:40 PM
Brecht Van Lommel (brecht) claimed this task.

These overlapping quads are really inefficient to raytrace, which leads to driver timeouts. While this could be optimized, I don't think we can consider this a bug currently.
https://docs.blender.org/manual/en/dev/render/cycles/gpu_rendering.html#the-nvidia-opengl-driver-lost-connection-with-the-display-driver