Run this command:
rfkill
D TYPE DEVICE SOFT HARD
0 bluetooth hci0 unblocked unblocked
1 wlan phy0 unblocked unblocked
If the wlan is hardware blocked, need to goto BIOS settings and change the wireless adapter to enabled.
For example, the Asrock X399, need to goto the BIOS and find South Bridge to change the wireless from Auto to Enabled.
