Fbdev disables HDMI audio output on Linux (560.35.03)

  • Arch Linux x86_64
  • Nvidia drivers 560.35.03
  • GTX1070 (MSI)

Enabling fbdev (nvidia_drm.fbdev=1) on kernel command line completely disables HDMI/DispalyPort audio output. Disabling fbdev restores audio. Tested on various kernel versions (6.6.x - 6.11.x)