BT function not working on Ubuntu Mate image. (CM4/M2S)

iamblue · October 7, 2023, 10:26am

Hello,

I tried Ubuntu Mate ( 2023-01-12-ubuntu-20.04-mate-desktop-bpi-cm4-aarch64-sd-emmc.img). But the BT function not working for scanning BT device. (such as TWS earphone).

I also installed bluez and tried sudo bluetoothctl and scan on , it shows :Failed to start discovery: org.bluez.Error.NotReady.

How to solve this problem?

Thanks

igorpec · October 7, 2023, 12:05pm

I think this works on Armbian, which is anyway highly recommended. Ubuntu is old, buggy and unmaintained.

github.com/armbian/build

Improve `bananapi-sm1` support `v2`

armbian:main ← pyavitz:bananapi-sm1

opened 12:44AM - 03 Aug 23 UTC

pyavitz

+532 -50

Linux 6.1 (current) / 6.4 (edge) Add "current" to: config/boards/bananapim2pr…o.csc Add uart_AO_B and uart_B to: meson-sm1-bananapi.dtsi Add related pins to: meson-g12-common.dtsi Add wif/bt support to: meson-sm1-bananapi-m5.dts (BT = uart_A) Add the ability to enable via overlays NOTE: The overlay to enable the wifi on the BPI-M5 will be added at a later date. # Checklist: - [ ] My code follows the style guidelines of this project - [ ] I have performed a self-review of my own code - [ ] I have commented my code, particularly in hard-to-understand areas - [ ] I have made corresponding changes to the documentation - [X] My changes generate no new warnings - [ ] Any dependent changes have been merged and published in downstream modules

Download from official page: → Bananapi CM4 io and M2S – Armbian

iamblue · October 16, 2023, 10:15am

Any update ? The Bluetooth function in official image cannot be used. This should be solved. We cannot jump to other OS at will.

August · October 17, 2023, 2:07am

check the bluetooth rfkill state and rtk bluetooth service state

# rfkill list
# systemctl status rtk-hciuart.service

iamblue · October 17, 2023, 3:30am

● rtk-hciuart.service - Attach /dev/ttyS1 to BlueZ stack Loaded: loaded (/lib/systemd/system/rtk-hciuart.service; enabled; vendor preset: enabled) Active: active (running) since Tue 2023-10-17 04:20:57 IST; 6min ago Process: 2995 ExecStartPre=/usr/sbin/rfkill unblock bluetooth (code=exited, status=0/SUCCESS) Main PID: 3020 (rtk_hciattach) Tasks: 1 (limit: 3398) Memory: 1.3M CGroup: /system.slice/rtk-hciuart.service └─3020 /usr/sbin/rtk_hciattach -n -s 115200 ttyS1 rtk_h5

Oct 17 04:20:57 bananapi systemd[1]: Starting Attach /dev/ttyS1 to BlueZ stack… Oct 17 04:20:57 bananapi rfkill[2995]: unblock set for type bluetooth Oct 17 04:20:57 bananapi systemd[1]: Started Attach /dev/ttyS1 to BlueZ stack.

iamblue · October 17, 2023, 3:37am

This log looks good. I open blueman-manager, but it cannot find any bluetooth earbubs.

August · October 17, 2023, 4:43am

did you connect two attenna cables? If so, execute the following commands and show the logs

# rfkill list
# hcitool dev
# hcitool scan

iamblue · October 17, 2023, 5:01am

0: bt-dev: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: phy0: Wireless LAN
	Soft blocked: yes
	Hard blocked: no
2: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no
	
	
	
Devices:
	hci0	C4:3C:B0:AD:C4:96
	
	
Scanning ...
Inquiry failed: Connection timed out

iamblue · October 17, 2023, 5:03am

I tried other official image ( Debian and Khadas build root(Ubuntu)) had same problem.

August · October 17, 2023, 7:45am

Bt scan well on mate after bootup. On gnome, you can restart rtk-hciuart.service after bootup or disable blueman-mechanism.service and using bt with bluetoothctl.

iamblue · October 17, 2023, 9:33am

@August

systemctl restart rtk-hciuart.service
systemctl disable blueman-mechanism.service

working for me . Thanks !