I am using ubuntu 18.04 on my ASUS-X550L laptop. In the settings it says "No bluetooth found. Plug in a dongle to use bluetooth." I tried sudo rfkill unblock all and systemctl restart bluetooth.service. It didn't work.

Output of sudo rfskill list all

0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

Output of systemctl status bluetooth.service

● bluetooth.service - Bluetooth service
   Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset
   Active: inactive (dead)
     Docs: man:bluetoothd(8)

Output of lsusb; dmesg | egrep -i 'blue|firm'

Bus 001 Device 002: ID 8087:8000 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 04f2:b40a Chicony Electronics Co., Ltd 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[    0.000000] [Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x20 (or later)
[    0.062011] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[    1.556640] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
[    2.453984] psmouse serio4: elantech: assuming hardware version 4 (with firmware version 0x361f03)
[   24.429952] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[   37.043932] ieee80211 phy0: rt2x00lib_request_firmware: Info - Loading firmware file 'rt3290.bin'
[   37.055254] ieee80211 phy0: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.37
  • Please edit to include results from terminal for lsusb; dmesg | egrep -i 'blue|firm'
    – Jeremy31
    Jun 2, 2018 at 19:36
  • You could try github.com/loimu/rtbth-dkms I have no idea if it actually works
    – Jeremy31
    Jun 7, 2018 at 10:30
  • I've got the same issue after installing acpi package.
    – ferdy
    Dec 21, 2018 at 7:37

1 Answer 1


Not sure for your case:

  1. Verify the network driver.

  2. Try the following commands:

    rfkill block bluetooth
    rfkill unblock bluetooth

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