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Ubuntu 16.04 does not recognize my built-in bluetooth adapter

I installed Ubuntu 16.04 on my Acer Aspire E5-573-347G, and I have not had any problems until I needed to use bluetooth.

The Unity bluetooth menu does not allows me to use any options, as can be viewed below.

Bluetooth menu

The lsusb command returns this information:

Bus 001 Device 002: ID 8087:8001 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 006: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 002 Device 005: ID 1bcf:2c81 Sunplus Innovation Technology Inc. 
Bus 002 Device 003: ID 1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory
Bus 002 Device 002: ID 2188:0ae1  
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

After that, I used rfkill list:

0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: acer-wireless: Wireless LAN
    Soft blocked: no
    Hard blocked: no

[Update 1]
When I use thehcitool scan command, the system returns the following message:
Device is not available: No such device

[Update 2]
Output of command lspci -knn | grep Net -A2:

03:00.0 Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter [168c:0036] (rev 01)
    Subsystem: Lite-On Communications Inc QCA9565 / AR9565 Wireless Network Adapter [11ad:0803]
    Kernel driver in use: ath9k
    Kernel modules: ath9k

Ask Ubuntu Asked by Otto Pinto on November 21, 2021

2 Answers

2 Answers

I had a similar problem and tried all the possible solutions available on different platforms. The only thing I needed to do was turn off the secure boot from the bios. Worked for me.

Answered by sumeghhp on November 21, 2021

Start the terminal from the dashboard.

type cd /var/log

then type grep -i firmware syslog*

These commands will search the system log looking for the word firmware. Look for any text indicating that it's having trouble loading firmware.

If so, then

type sudo apt-get update

then type sudo apt-get install linux-firmware

Then reboot the computer.

These commands will install a missing firmware file that the bluetooth adapter probably needs. No harm done if it doesn't.

If that all doesn't fix your problem, review this from a Google search that I did:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1532267

It sounds kind of like your problem too.

Keep us posted. Cheers, Al

Answered by heynnema on November 21, 2021

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