GPU Strangeness

[FedPete]

Yesterday I’ve concluded my Robot entry in the weekly collab. Working with Blender Cycles with GPU mode turned on. I’m using CUDA as a setting in the preferences.
Tonight I wanted to start with the next collab subject, involving glass. So I need Cycles and GPU turned on. I didn’t have a (known to me) Blender update, currently using 3.3.0

But now I can’t turn on my GPU. Blender states:

No compatible GPU’s found for Cycles
Requires NVIDIA GPU with compute capability 3.0

And this is strange, normally I could choose between onboard Intel GPU or NVidia.
Now both are invisible to the software … Even good old onboard Intel. What happened with compute capability?

Using Ubuntu

Any hints?

[Todd_Vance]

All I have is this change for 3.3:

https://wiki.blender.org/wiki/Reference/Release_Notes/3.3/Cycles#GPU_Rendering

Requires Intel Arc or Data Center GPU, and a specific Linux driver 22.26.23570 or newer.

[NP5]

So weird if it was working the previous day and you changed nothing.

Just try a restart of the computer.?
Could it be the gpu died?

[Todd_Vance]

Pretend it’s Windows and try restarting. It might just work.

Actually, I was trying CUDA programming on a Linux box (a decade ago) stuffed with graphics cards. (it was under my desk and made a good space heater) From time to time, a memory error would make the cards hang and I had to reboot. I think modern cards are more resilient to memory errors, but it still might work.

[zeRgenTa]

I’ve had it happen to me a few times, but only when my computer suspends while Blender is running and cycles is enabled. A simple reboot fixes it.

@FedPete

Using Ubuntu

Is there any chance you’re using the snap version of blender, and an update changed what hardware snap packages have access to?

[FedPete]

Yes, “snap” is doing the update, which is also a strange mechanism. Always pending …
I will reboot. and see what’s happening.

[FedPete]

Hurrah! A reboot did the trick.
Got a nice message about CUDA-supported GPUs.

But I did also some investigation about my graphics card.

My NVIDIA Quadro K3000M (2012) is a laptop thingy.
If this card at speed factor 1 (relative Performance).
A GeForce RTX 3090 Ti is 31 times faster.

So, do you need a high-end card to create beautiful scenes?
No, it helps only in development time and complex scenes.
And with the new CyclesX I have already an improved preview view.

Thanks to you all!
Have fun, and show what you are working on.

Note: Also strange, all replies got automatically “Solution” marked.