Random System Freezes while using Blender #80073

New Issue

Florian · 2020-08-24T12:16:33+02:00

Florian commented

2020-08-24 12:16:33 +02:00

Update

This seems to be a bug in the i915 graphics driver ... there is an open ticket over at their bug tracker: https://gitlab.freedesktop.org/drm/intel/-/issues/2380

System Information
Operating system: Arch Linux (current as of 2020-08-24)
Graphics card: Intel Integrated 10th Gen
system-info.txt: system-info.txt

Blender Version
Broken: (2.83.5, 2.91.0 alpha)
Worked: none

Graphical System Output is frozen system wide. Only fix able by restarting X or Wayland. Sometimes the last two frames flicker back and forth randomly.

Exact steps for others to reproduce the error
This happens randomly after a while after running a short Python script several times. Mostly while simply rotating the scene. I am using the Scripting Layout at that point.

Comment
Honestly I have no idea if this is even a blender problem ... but so far this has only manifested while running blender. As stated above I tried both X, Wayland and at least two versions of Blender. One of the builds had what I think was a cpu renderer option, which also crashed after a while. Is there a way to write debug output to a file that persists a reboot via console?

edit: Reproducable on:

Gnome (X, Classic and Wayland) and XFCE
X and Wayland
Two Blender Versions
i915 (intel driver) with and without "enable_guc=2" and "enable_fbc=1"

The only thing I can not rule out is that it's the Intel Graphics Driver ... but I can't really circumvent that one.

Python Script that was mentioned: script.py

**Update** This seems to be a bug in the i915 graphics driver ... there is an open ticket over at their bug tracker: https://gitlab.freedesktop.org/drm/intel/-/issues/2380 **System Information** Operating system: Arch Linux (current as of 2020-08-24) Graphics card: Intel Integrated 10th Gen system-info.txt: [system-info.txt](https://archive.blender.org/developer/F8808046/system-info.txt) **Blender Version** Broken: (2.83.5, 2.91.0 alpha) Worked: none Graphical System Output is frozen system wide. Only fix able by restarting X or Wayland. Sometimes the last two frames flicker back and forth randomly. **Exact steps for others to reproduce the error** This happens randomly after a while after running a short Python script several times. Mostly while simply rotating the scene. I am using the Scripting Layout at that point. **Comment** Honestly I have no idea if this is even a blender problem ... but so far this has only manifested while running blender. As stated above I tried both X, Wayland and at least two versions of Blender. One of the builds had what I think was a cpu renderer option, which also crashed after a while. Is there a way to write debug output to a file that persists a reboot via console? **edit:** Reproducable on: - Gnome (X, Classic and Wayland) and XFCE - X and Wayland - Two Blender Versions - i915 (intel driver) with and without "enable_guc=2" and "enable_fbc=1" The only thing I can not rule out is that it's the Intel Graphics Driver ... but I can't really circumvent that one. Python Script that was mentioned: [script.py](https://archive.blender.org/developer/F8808052/script.py)

Florian commented

2020-08-24 12:16:33 +02:00

Added subscriber: @fho

Florian commented

2020-08-25 19:10:01 +02:00

This seems to be a bug in the i915 graphics driver ... there is an open ticket over at their bug tracker: https://gitlab.freedesktop.org/drm/intel/-/issues/2380

Not sure what an appropriate status for "not a blender problem" is.

This seems to be a bug in the i915 graphics driver ... there is an open ticket over at their bug tracker: https://gitlab.freedesktop.org/drm/intel/-/issues/2380 Not sure what an appropriate status for "not a blender problem" is.

Richard Antalik commented

2020-08-26 06:38:38 +02:00

Added subscriber: @iss

Richard Antalik commented

2020-08-26 06:38:38 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2020-08-26 06:38:38 +02:00

Can you run Blender form console with --debug argument and redirect output to file just to see if we can confirm GPU/blender issue?

Florian commented

2020-08-28 09:54:38 +02:00

Sure. Here is the output of

blender --debug --debug-gpu

blender-log-2020-08-28T09:50+02:00.txt

Sure. Here is the output of ``` blender --debug --debug-gpu ``` [blender-log-2020-08-28T09:50+02:00.txt](https://archive.blender.org/developer/F8816810/blender-log-2020-08-28T09_50_02_00.txt)

Richard Antalik commented

2020-08-28 11:46:22 +02:00

I don't see any useful info in log. and script works in my case, but Perhaps I need correct data for it to fail. Could you also upload .blend file where you can run this script with crashing?
You could also try to simplify script to try to identify what causes crash by removing some operations.

I don't see any useful info in log. and script works in my case, but Perhaps I need correct data for it to fail. Could you also upload .blend file where you can run this script with crashing? You could also try to simplify script to try to identify what causes crash by removing some operations.

Florian commented

2020-08-28 11:56:23 +02:00

I don't think it's related to the script ... I just included that for completeness. Actually I can crash blender without any file open and the other guy on the i915 bug tracker obviously does have a different scene.

Richard Antalik commented

2020-08-28 13:20:30 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Richard Antalik closed this issue

2020-08-28 13:20:30 +02:00

Richard Antalik self-assigned this 2020-08-28 13:20:30 +02:00

Richard Antalik commented

2020-08-28 13:20:30 +02:00

Thanks for information, I think we can safely assume this is not bug in Blender, so I will close this report. If you get more information, please leave a comment so we can reopen, or create new report with new relevant information.

Andrew Dionne commented

2020-08-29 19:13:17 +02:00

Added subscriber: @CepheidVariable

Andrew Dionne commented

2020-08-29 19:13:17 +02:00

I apologize ahead of time for bothering you with this, but I wanted to point out that this is probably the same problem as https://developer.blender.org/T77466

I'm going to argue that it's a driver bug, because switching away from the Iris driver seems to resolve the crash, and the Intel gitlab discussion points to a geometry shader problem.

I bisected the commit that introduced the GPU hang on the Blender side, and it was commit d712f1f83a, which introduced a new shader for drawing smooth lines, using a geometry shader.

That said, Arch Linux's latest packaged version, 2.83.5-2, released on August 21st, seems to resolve the hang for me, so a commit somewhere between the 17th and the 21st might have fixed the cause of the GPU hang on Blender's side. I know it's not a driver fix that resolved it.

I apologize ahead of time for bothering you with this, but I wanted to point out that this is probably the same problem as https://developer.blender.org/T77466 I'm going to argue that it's a driver bug, because switching away from the Iris driver seems to resolve the crash, and the Intel gitlab discussion points to a geometry shader problem. I bisected the commit that introduced the GPU hang on the Blender side, and it was commit d712f1f83af881be536ec0d183b7d3025c172684, which introduced a new shader for drawing smooth lines, using a geometry shader. That said, Arch Linux's latest packaged version, 2.83.5-2, released on August 21st, seems to resolve the hang for me, so a commit somewhere between the 17th and the 21st might have fixed the cause of the GPU hang on Blender's side. I know it's not a driver fix that resolved it.

Richard Antalik commented

2020-08-31 11:05:44 +02:00

It does look like it is the same issue, when I read whole thread.

That said I will merge this report and keep that one open, since I am not sure if that could be considered a regression, or just a buggy driver.

It does look like it is the same issue, when I read whole thread. That said I will merge this report and keep that one open, since I am not sure if that could be considered a regression, or just a buggy driver.

Richard Antalik commented

2020-08-31 11:19:33 +02:00

Closed as duplicate of #77466

Richard Antalik closed this issue

2020-08-31 11:19:33 +02:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Random System Freezes while using Blender #80073