Complement about topic: 2 GPUs NVIDIA RTX A2000 and A4000 in Manjaro

Graphics / Linux Linux
1

I need to update below topic, but it was closed.

2 GPUs NVIDIA RTX A2000 GPUs installed in Manjaro, but only the first GPU outputs are displayed

This topic it might help someone who has a similar problem.

I saw that the official Linux driver was updated from version 535 to 550 in last feb 23. The release notes contains some fixes about DRM.

Last week I installed the new driver, and I got success.
12 screens are works well with 3 gpus (A4000). This environment is working with 1080p resolution and DRM module, activated by modprobe.d file.

Sorry to open a new topic about it, but I think that I need to share this solution for all. I received a lot of help here.

2

So which route did you actually take, Prime or Mosaic?

3

In this case, it works using NVIDIA DRM.

NVIDIA DRM enables Nvidia Prime by default, and activates this feature for each display, that connected on the GPU 2 and 3.

One point of attemption is that NVIDIA Settings doesn’t works for displays on 2nd and 3th GPUs. It’s recommended use another screen manager like “Displays” in manjaro XFCE.

4

I guess they’re displayed as “PRIME Display”? Previously , the secondary gpu usually was amd or intel, so it couldn’t configure them. Now that nvidia gpus can be used as secondary output sinks, this is a shortcoming of nvidia-settings .

5

Yes. They’re displayed as Prime Display, but Nvidia-Settings shows these message “PRIME Displays cannot be controlled by nvidia-settings and must be configured by an external RandR capable tool”.

In this case, I can’t control PRIME Displays using Nvidia Settings, just using a default display config app of distro.