Comment 25 for bug 1848953

@florin, backup /lib/firmware folder, and clone aforementioned git repo into the same place. Power off completely for a minute or so and reboot. Detailed commands:

  $ cd /lib
  $ sudo mv firmware firmware.dpkg
  $ sudo git clone https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git firmware

When you finished testing, move the folders back:

  $ cd /lib
  $ sudo mv firmware firmware.git
  $ sudo mv firmware.dpkg firmware