weirdness, on a hybrid laptop NV/intel, running Linux:

weirdness, on a hybrid laptop NV/intel, running Linux:

‘/home/user/Documents/UnrealProjects/FPS_Game/Saved/StagedBuilds/LinuxNoEditor/FPS_Game/Binaries/Linux/FPS_Game’ …/…/…/FPS_Game/FPS_Game.uproject /Game/FPS_Game/Maps/Testing -stdout -abslog=/tmp/+run+media+user+723b3ed1-c5f7-463e-9064-d037bcacaaa8+src+UnrealEngine-4.27/Logs/Client.log -Messaging -CrashForUAT -SessionId=09AB9A4F6594
uses the right GPU (nv RTX)
but:
this doesnt , it uses the intel GPU even when I use prime-run.
user  …  FPS_Game  out  LinuxNoEditor  ls -lt
total 8
drwxr-xr-x 4 user user 37 27 févr. 12:02 FPS_Game
drwxr-xr-x 3 user user 22 27 févr. 12:02 Engine
-rw-r–r-- 1 user user 872 27 févr. 12:02 Manifest_NonUFSFiles_Linux.txt
-rwxr-xr-x 1 user user 278 27 févr. 12:02 FPS_Game.sh
user  …  FPS_Game  out  LinuxNoEditor  pwd
/home/user/Documents/Unreal Projects/FPS_Game/out/LinuxNoEditor

FYI, all 3D sofware and games (steam and epic) run fine and use the right GPU.
any ideas ? both created/complied with the same code on the same UE4 session , which produced the same binary

ls -l /home/user/Documents/Unreal\ Projects/FPS_Game/Saved/St  2 uilds/LinuxNoEditor/FPS_Game/Binaries/Linux/FPS_Game-Linux-Shipping /home/user/Documents/Unreal\ Projects/FPS_Game/Binaries/Linux/FPS_Game-Linux-Shipping
-rwxr-xr-x 1 user user 97503000 27 févr. 12:01 /home/user/Documents/Unreal Projects/FPS_Game/Binaries/Linux/FPS_Game-Linux-Shipping
-rwxr-xr-x 1 user user 97503000 27 févr. 12:01 /home/user/Documents/Unreal Projects/FPS_Game/Saved/StagedBuilds/LinuxNoEditor/FPS_Game/Binaries/Linux/FPS_Game-Linux-Shipping