Blender randomly stops responding under Linux. #83939
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Reference: blender/blender#83939
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Blender randomly stops responding under Linux (Debian flavour - Buster and Bullseye versions respectively).
AMDGPU-PRO drivers installed manually - tested versions: 20.10 and 20.40.
The issue happens during tasks such as: modeling, workspace switching, changing viewport shading, playing baked smoke simulation, rendering still images and animations.
There is no sign, warning or stuttering before hangup. The Blender process hangs with one or two CPU cores utilised. After killing the process with SIGTERM or SIGKILL options the process respawns and frees system resources.
Sometimes the RAM is not freed. The Blender and Blender Render windows never dissappears. They can be moved around, resized and switched between workspaces in Linux.
Broken with:
2.90.1 hash
3e85bb34d02.91.0 hash
0f45cab8622.92.0 hash
010f44b855There is no predictable way to reproduce it. I've attached dump from console with options
When the hangup happened the following lines appeared:
Attaching full console log from the session:
blender_dump
system-info.txt
Added subscriber: @silex
Added subscriber: @rjg
Changed status from 'Needs Triage' to: 'Needs User Info'
At a first glance I couldn't see anything in the log file that would explain the freeze. This could be a problem with the graphics driver. Unfortunately, we would need some reproducible steps that allows us to test and verify the problem on our systems.
Thank you. I'll try to fiddle with drivers and find some solid information.
Added subscriber: @ankitm
@ankitm suggested in DevTalk thread https://devtalk.blender.org/t/blender-randomly-hangs-what-cli-debug-options-should-be-enabled-for-gpu-issues/16660/3 running Blender with only one thread (-t 1 argument) to further troubleshoot.
I run animation render overnight that way and there's no sign of hangup so far, and Blender is still responsive.
While reading the report I was (somehow) reminded of
bb49aa0d69and just threading in general so I suggested that -t 1 option.If you can share a simple file with a few objects other people could test it on their systems too.
A deadlock/livelock could certainly be a reason for a hang.
Most of the hangups are happening in 2.90.1, as this is the version I'm running for production right now.
But it was released 23. Sep - way before multithreaded geometry export patch (21 Oct).
HANG_TEST_Blender_2.90.1.blend
As for locking - hangups are happening during intensive work.
After uninstalling AMDGPU-PRO drivers the hangups are gone. I've succesfully run animation render overnight and baked smoke simulation.
Changed status from 'Needs User Info' to: 'Archived'
@silex I'm closing the ticket then, as this seems to have been caused by an issue with the graphics driver.