Jupyter kernel doesn't start in 2.90.1

[konstantin-anori]

In blender 2.90.1 jupyter kernel hangs and after some time raises an exception: RuntimeError: Kernel didn't respond to kernel_info_request

There is a workaround: If after blender starts you create a new file (File->New->General) jupyter works fine.

It seems like the timer hack in kernel.py doesn't work any more. Kernel is started by loadHandler() when you create a new file.

I'd be very glad to fix it myself but don't know blender API well enough.

[cheng-chi]

Interesting, I will take a look this weekend.

[cheng-chi]

@konstantin-anori Sorry for the extreeeeeme delay. Just letting you know that I have started working on it. According to my experiment, 2.91 works if you launch it directly from a terminal (and launch kernel in browser), but fails if launched from vscode. Still investigating.

[cheng-chi]

@konstantin-anori Unable to reproduce your error

[john-rogers]

Many thanks for this cheng-chi, it's just what i needed. Although i experienced the same issue as konstantin-anori his fix worked for me. I'm using Blender 2.92 and python 3.7.4