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Jörg Dittmer (NoHow)
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Feb 10 2020, 2:17 PM (8 w, 3 d)

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Feb 10 2020

Jörg Dittmer (NoHow) added a comment to T73541: Computer crashes when rendering in cycles with GPU.

@Robert Kirberich (robert) Guetzkow: Ohh, i really apologize. It's indeed the wrong place for that.

Feb 10 2020, 4:48 PM · Render & Cycles, BF Blender
Jörg Dittmer (NoHow) added a comment to T62562: Blender 2.8 Eevee randomly closing during render: EXCEPTION_ACCESS_VIOLATION.

I looked at the cycles documentation and it feels somewhat 'hidden' to the technicaly unexperienced user.
I can imagine that the linked Microsoft document can throw off some/many users.

Feb 10 2020, 4:32 PM · EEVEE & Viewport, BF Blender
Jörg Dittmer (NoHow) added a comment to T62562: Blender 2.8 Eevee randomly closing during render: EXCEPTION_ACCESS_VIOLATION.

I'm running Win7 64bit and had this problem with MeshRoom. There was no popup with the 'driver time out' mentioned, just a message saying 'MeshRoom stopped working'. Maybe it's different on Win10 or it's related to the MeshRoom architecture,

Feb 10 2020, 4:16 PM · EEVEE & Viewport, BF Blender
Jörg Dittmer (NoHow) added a comment to T73035: Eevee crashes when rendering a completely empty scene with just an animated camera.

Cause this is not reproducable... could this be related to the TdrDelay problem?
See my post here: https://developer.blender.org/T73541#868751

Feb 10 2020, 4:04 PM · BF Blender
Jörg Dittmer (NoHow) updated subscribers of T73541: Computer crashes when rendering in cycles with GPU.

@Robert Kirberich (robert) Guetzkow: ahh, good to hear that it's well known :)

Feb 10 2020, 3:50 PM · Render & Cycles, BF Blender
Jörg Dittmer (NoHow) added a comment to T70490: Blender crashes when going into "rendered" viewport mode using cycles..

Hi,
i have a gut feeling that this is again a problem with the Windows TDR feature, espacialy if it happens after a >2sec GUI freeze!

Feb 10 2020, 3:35 PM · Cycles, BF Blender
Jörg Dittmer (NoHow) added a comment to D4265: Cycles: delay CUDA and OpenCL initialization to avoid driver crashes..

Hmm, this all doesn't sound exactly like the problem i have in mind... but just in case:
There is a Windows feature called Timeout Detection and Recovery (TDR) causing a complete GPU reset.
The SubstancePainter people wrote a nice explanation and fix for that:
https://docs.substance3d.com/spdoc/gpu-drivers-crash-with-long-computations-128745489.html

Feb 10 2020, 3:19 PM
Jörg Dittmer (NoHow) added a comment to T73541: Computer crashes when rendering in cycles with GPU.

Hi,
i think this could be related to the very usual (but apperently not well known) windows problem with long running GPU computations.
If crashes happen after >2sec of GUI freeze... i'm pretty sure this is caused by the Windows TDR feature!

Feb 10 2020, 3:03 PM · Render & Cycles, BF Blender
Jörg Dittmer (NoHow) added a comment to T60462: Blender 2.8 (various versions) crashes in GPU animation rendering (many card types), both eevee and cycles.

Wow, sounds again like the usual Windows problem with long running computation on the GPU.
Just posted it on another issue a few minutes ago.
If that happens after > 2sec of freezing the GUI , i have a gut feeling that
the Window Timeout Detection and Recovery (TDR) feature is causing this.

Feb 10 2020, 2:42 PM · Cycles, Eevee, BF Blender
Jörg Dittmer (NoHow) added a comment to T62562: Blender 2.8 Eevee randomly closing during render: EXCEPTION_ACCESS_VIOLATION.

Ahh, i forgot... it surely applies to cycles rendering too!

Feb 10 2020, 2:29 PM · EEVEE & Viewport, BF Blender
Jörg Dittmer (NoHow) added a comment to T62562: Blender 2.8 Eevee randomly closing during render: EXCEPTION_ACCESS_VIOLATION.

Hi all,
it sounds to me like the common problem with heavy GPU computation under Windows.
There is a windows feature called Timeout Detection and Recovery (TDR) which complete resets the GPU after 2sec of freezing (GPU is unresponsive)!
SubstancePainter had the same problems and they wrote a nice tutorial on how to change the "TdrDelay" in the windows registry.
https://docs.substance3d.com/spdoc/gpu-drivers-crash-with-long-computations-128745489.html

Feb 10 2020, 2:28 PM · EEVEE & Viewport, BF Blender