xubuntu@xubuntu:~$ sudo apt-get install --reinstall linux-firmware
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be upgraded:
  linux-firmware
1 upgraded, 0 newly installed, 0 to remove and 58 not upgraded.
Need to get 24.3 MB of archives.
After this operation, 5,685 kB of additional disk space will be used.
Get:1 http://security.ubuntu.com/ubuntu/ trusty-security/main linux-firmware all 1.127.15 [24.3 MB]
Fetched 24.3 MB in 1min 14s (327 kB/s)                                         
(Reading database ... 155971 files and directories currently installed.)
Preparing to unpack .../linux-firmware_1.127.15_all.deb ...
Unpacking linux-firmware (1.127.15) over (1.127.14) ...
Setting up linux-firmware (1.127.15) ...