These might be on some help:

https://dev1galaxy.org/viewtopic.php?pid=20903#p20903
- my fixed version of /etc/init.d/nvidia-persistenced.
and
https://dev1galaxy.org/viewtopic.php?pid=20917#p20917
- which explains that you can probably also get away with simply removing or disabling nvidia-persistenced as for most use cases it's not needed unless you want to use CUDA.

Oh thanks!

Actually I want use CUDA for Blender...

EDIT

Oh boy you are a genius... I would really like being able to open a code, understand it, and eventually fix it!!!

https://dev1galaxy.org/viewtopic.php?pid=20903#p20903
- my fixed version of /etc/init.d/nvidia-persistenced.
and
https://dev1galaxy.org/viewtopic.php?pid=20917#p20917
- which explains that you can probably also get away with simply removing or disabling nvidia-persistenced as for most use cases it's not needed unless you want to use CUDA.

I am fully Devuanized but we are few and systemd is all over the world hence trying to find a solution these days has been complicated, I have an issue with an Nvidia package (nvidia-persistenced) not fully installed, the workarounds I found involved looking at journalctl and fixing the way systemd initializes the GPU.

Should learn how check to the logs again, then beside SYSLOG, DMESG, X.org.log and propably KERN.log where have I to check for potential issues related with this package not completely installed?

Honestly I had a tons of issues more that were resolved moving from stable to testing as I have to the habit to use Debian.

Thanks,

Danielsan