General

Forgotten Credentials

If you forgot your credentials to the web UI, try this.
sunshine --creds {new-username} {new-password}
./sunshine.AppImage --creds {new-username} {new-password}
flatpak run --command=sunshine dev.lizardbyte.Sunshine --creds {new-username} {new-password}

Web UI Access

Can’t access the web UI?
  1. Check firewall rules.

Nvidia issues

NvFBC, NvENC, or general issues with Nvidia graphics card.

Controller works on Steam but not in games

One trick might be to change Steam settings and check or uncheck the configuration to support Xbox/Playstation controllers and leave only support for Generic controllers.

Also, if you have many controllers already directly connected to the host, it might help to disable them so that the Sunshine provided controller (connected to the guest) is the “first” one. In Linux this can be accomplished on USB devices by finding the device in /sys/bus/usb/devices/ and writing 0 to the authorized file.

Packet loss

Albeit unlikely, some guests might work better with a lower MTU from the host. For example, a LG TV was found to have 30-60% packet loss when the host had MTU set to 1500 and 1472, but 0% packet loss with a MTU of 1428 set in the network card serving the stream (a Linux PC). It’s unclear how that helped precisely so it’s a last resort suggestion.