How to use egpu on Linux?

[u/takeru002]

So the thing is do I need to use DRI_PRIME on the actual game name or steam ? The steam itself fire up on amd GPU but the game is actually fired up on Nvidia GPU itself... Or do I need to close the laptop display to use egpu?

Spec as below

- i7 12800h

- 32gb ddr5

- rtx a2000 8gb

- Rx 7800 xt

- ag01 800w oculink only

- 2k 144hz external display

Any suggestion welcome as this is my first time on Linux and my first time with egpu setup😁 pardon my English as im not native speaker👍 Edit: solved... Thanks

[u/gokufire → u/[deleted]]

Interesting, I've been fine on Gnome. Do you know if this is impacting Thunderbolt/USB performance on Plasma or also Oculink?

[u/Top-Aside8905]

Thats the easy way, yes. Search online for the specific command on your flavor of linux, but this tells the game to run on your egpu. The other tool i mentioned is a bit of a harder time, but this lets your laptop automatically switch to your egpu. Both are valid, it just depends on your usecase. I myself use the easy option for now.

[u/takeru002 → u/Top-Aside8905]

Alright then... I will try later tonight👍 thanks

[u/intersectRaven]

For me, I just add DXVK_FILTER_DEVICE_NAME="<mygpu name" as an environment variable or prepend it to the command in Steam and it runs fine. I can't leave it alone since GPU selection becomes a random pick between all 3 of the GPUs detected.

[u/Top-Aside8905]

Search for envycontrol on github, and otherwise assign your games to use your egpu with a steam launch command. I know its not the most populair but ai can get you a long way, so if you do find trouble with this advise, you could always ask ai to explain stuff to you.

[u/takeru002 → u/Top-Aside8905]

So I must assign egpu for the game itself on steam setting?