Steam on Linux - cheatsheet

steamonlinux.md

Useful environment variables to run app on dGPU

__NV_PRIME_RENDER_OFFLOAD=1         # enable renderer offloading
__GLX_VENDOR_LIBRARY_NAME=nvidia    # required for GLX app
__VK_LAYER_NV_optimus=NVIDIA_only   # report only NVIDIA gpu to Vulkan

DXVK (https://github.com/doitsujin/dxvk) might use the iGPU, we filter for Nvidia devices only.
use glxinfo|grep 'OpenGL renderer string' to get the string use vulkaninfo|grep deviceName to get the string (from vuklan-tools package)

DXVK_FILTER_DEVICE_NAME="GeForce"
DXVK_HUD=1
PROTON_LOG=1 # optionnal

Steam game command line parameter:

__NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia __VK_LAYER_NV_optimus=NVIDIA_only DXVK_FILTER_DEVICE_NAME="GeForce" %command%

DXVK_HUD possible values

• 1: devinfo,fps
• full: all of them
• devinfo: Displays the name of the GPU and the driver version.
• fps: Shows the current frame rate.
• frametimes: Shows a frame time graph.
• submissions: Shows the number of command buffers submitted per frame.
• drawcalls: Shows the number of draw calls and render passes per frame.
• pipelines: Shows the total number of graphics and compute pipelines.
• memory: Shows the amount of device memory allocated and used.
• gpuload: Shows estimated GPU load. May be inaccurate.
• version: Shows DXVK version.
• api: Shows the D3D feature level used by the application.
• compiler: Shows shader compiler activity
• samplers: Shows the current number of sampler pairs used [D3D9 Only]

Edit user_settings.py in $HOME/.steam/steam/steamapps/common/Proton/ so it's applied on every Proton games