drivers – Why is Dell XPS 15 9500 wifi card not recognized on Ubuntu 21.04 Hirsute?

After reading many contributions about the support of the Killer wifi card of the Dell XPS 15 9500 with the 5.10/5.11 kernels, I decided to install Ubuntu 21.04 Hirsute which provides the 5.11 kernel by default.

Everything on the laptop is working fine, great!
But not the wifi card 🙁

  • lspci shows the wifi card
  • lsmod shows the various ath11k modules loaded
  • ifconfig or ip show only the lo interface

What is missing on this installation to recognize the wifi card?