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Blender was working fine for me recently, but now I'm observing a problem. Blender 2.81a and 2.79 seem to have the same issue. using cycles I get a crash as soon as I select GPU from the list of rendering devices. I don't even start rendering, it crashes just by selecting GPU. I went to check settings (do not recall if its set to GPU or GPU+CPU) only to find that clicking the System tab in settings also causes an instant crash. The computer is updated regularly, but I don't know when the issue showed up. How can I troubleshoot this?

on the console the only piece of information it seems to give me is "segmentation fault"

OS is Ubuntu 18.04LTS

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  • $\begingroup$ Maybe the GPU is not supported. $\endgroup$
    – Lukasz-40sth
    Commented Jan 23, 2020 at 10:29
  • $\begingroup$ This exact configuration was working previously, it just suddenly started to crash. $\endgroup$
    – user845238
    Commented Jan 23, 2020 at 23:10
  • $\begingroup$ when adding the -d switch to print debug options, the crash shows this: : CommandLine Error: Option 'help-list' registered more than once! LLVM ERROR: inconsistency in registered CommandLine options Writing: MyFile.crash.txt Segmentation fault (core dumped) googling that command line issue and LLVM error, that sounds like openCL related stuff. I noticed something else that's more troublesome, if I open a file that was saved with the compute device set to GPU it will crash when going to the system tab in settings, clicking the output options button, or attempting to render. $\endgroup$
    – user845238
    Commented Jan 24, 2020 at 0:06

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In the event that it helps someone else out, I think the issue was an incompatibility with a kernel update. It's unfortunate but it appears that AMDGPU lags behind Ubuntu in kernel compatibility.

The machine recently updated to Kernel version 5.3. reverted it to 5.0 which was the previous version, reinstalled amdgpu and everything is fine again. I installed amdgpu (pro version this time) 19.50, which is the latest version as of Jan 2020.

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