23.10 to 24.04 upgrade needed to reinstall of GPU drivers for Blender to see them

[Jaakan Shorter]

how to reproduce the issue

1. clean install of Ubuntu 23.10 on something like a Dell Optiplex 5050 + GTX 1650
2. make sure nvidia-driver-535(proprietary, tested) is installed and active
3. install Blender 4.1.1 from Snap
4. open Blender and go to the GPU settings, GPU should be listed
5. update to current patch level IE update-manager ( reboot )
6. upgrade to 24.04 via update-manager -d ( reboot )
7. open Blender and go to the GPU settings, GPU should be missing

to fix

1. switch to nouveau ( reboot )
2. switch back to nvidia-driver-535(proprietary, tested) ( reboot )
3. open Blender and go to the GPU settings, GPU should be listed

Dell Optiplex 5050 ( GF's daughter's computer, she uses for Blender 4.1.1 )
I7-7700
GTX 1650 + nvidia-driver-535(proprietary, tested)
was on Ubuntu 23.10

Did an update-manager -d to 24.04 and everything seemed to go smoothly. I opened Blender 4.1.1 and it couldn't find the GPU. I had to switch to nouveau, reboot, switch back to nvidia-driver-535(proprietary, tested), and reboot and Blender 4.1.1 could find the GPU again.

I did the same on my computer

Custom PC
i5-12400F
Arc A750 + intel's Ubuntu Repo
was on Ubuntu 23.10

Did an update-manager -d to 24.04 and everything seemed to go smoothly too. I opened Blender 4.1.1 and it couldn't find the GPU. I tired older versions no luck. reinstalled all the packages from intel no luck. this might be partly an intel issue so I posted in their community too

https://community.intel.com/t5/Intel-ARC-Graphics/Blender-can-t-find-my-GPU-now-upgraded-to-Ubuntu-24-04-from-23/m-p/1593065#M13990