Troubleshooting Bluetooth 5.4 dongle on Ubuntu Linux

Check if the device is detected

lsusb
# detaileed output
lsusb -v

hcitool dev

• lsusb is a command to list USB devices

• hcitool is a command to configure bluetooth devices. hcitool dev will display local Bluetooth devices

• dmesg - print or control the kernel ring buffer

• hciconfig - Configure Bluetooth devices

• rfkill - tool for enabling and disabling wireless devices

• lsmod - Show the status of modules in the Linux Kernel

dmesg | egrep -i 'blue|firm'

hciconfig -a

sudo cat /sys/kernel/debug/usb/devices
sudo cat /sys/kernel/debug/usb/devices | grep Vendor=33fa

Bluetooth: hci0: Opcode 0x1005 failed: -110

-110 means timed out or firmware loading problem

Links

• https://simpleit.rocks/linux/shell/connect-to-bluetooth-from-cli/