docs(linux): fix for no steamvr dashboard on hybrid graphics (#2511)

* docs(linux): fix for no steamvr dashboard on hybrid graphics

* docs(linux) specify dashboard fix is for nvidia

* docs(linux): note to first close the steam client before opening it with render offload

wiki/Linux-Troubleshooting.md

@@ -82,6 +82,9 @@ Put `DRI_PRIME=1 %command%` into SteamVR's commandline options and in those of a
 
 Put `__NV_PRIME_RENDER_OFFLOAD=1 __VK_LAYER_NV_optimus=NVIDIA_only __GLX_VENDOR_LIBRARY_NAME=nvidia %command%` into SteamVR's commandline options and in those of all VR games you intend to play with ALVR.
 
+### SteamVR Dashboard not rendering in VR on Nvidia discrete GPU
+If you encounter issues with the SteamVR dashboard not rendering in VR you may need to run the entire steam client itself via PRIME render offload. First close the steam client completey if you have it open already, you can do so by clicking the Steam dropdown in the top left and choosing exit. Then from a terminal run: `__NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia steam-runtime`
+
 ## Wayland
 
 When using old Gnome (< 47 version) under Wayland you might need to put `WAYLAND_DISPLAY='' %command%` into the SteamVR commandline options to force XWayland on SteamVR. This fixes issue with drm leasing not being available.