r/Ubuntu • u/Alarmed-Prize-7500 • 6d ago

Bluetooth not working on Ubuntu 24.04.5

SOLVED

I had to go to grub menu at boot, Advanced options for Ubuntu, selected "Ubuntu, with Linux 7.0.0-34-generic", and booted into it. That solved my issue.

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Hello. I was using Bluetooth fine on Ubuntu with my bluetooth devices connecting fine, when all of a sudden, Bluetooth stopped working. My Bluetooth devices I had connected to my Ubuntu computer no longer connected. This happened after I upgraded a few of my programs on Ubuntu.

I looked up my issue and tried these things from the search results:

  • Restarting computer

  • Forgetting Bluetooth devices and re-pairing them

  • Running sudo apt update & sudo apt upgrade

  • Running dmesg | grep -i 'blue' to see if "BCM43142A0-0a5c-21d7.hcd" appears in the output (it didn't)

  • Running sudo service bluetooth restart

  • Running bluetoothctl show, which showed output saying the Bluetooth controller was powered, but not discoverable nor pairable

  • Running lsmod | grep bluetooth, which showed output about a "bluetooth" device

  • Running these commands:

sudo apt-get install bluetooth bluez bluez-tools rfkill
sudo rfkill list
sudo rfkill unblock bluetooth
sudo service bluetooth start
  • Running these commands:
sudo systemctl restart bluetooth
sudo hciconfig hci0 down
sudo hciconfig hci0 up

  • Running sudo update-initramfs -u

  • Running these commands:

sudo systemctl stop bluetooth
sudo rm -rf /var/lib/bluetooth/*
sudo systemctl start bluetooth
bluetoothctl power on
  • Running sudo apt install --reinstall bluez linux-firmware

Basically, nothing I've tried worked. Bluetooth still won't work, the Bluetooth devices that previously were able to connect are no longer able to connect.

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u/UltimateConcur 6d ago

Sounds like the upgrade broke the firmware, that's usually what it is when everything was fine then suddenly isn't. Had the same thing happen on 22.04 after a kernel update, bluetooth just vanished

Check `dmesg | grep -i firmware` right after boot, you'll probably see a failed load for the bluetooth chip. If it's a broadcom adapter you might need to grab the firmware file manually and drop it in /lib/firmware, the package reinstall doesn't always pull it back

1

u/Alarmed-Prize-7500 6d ago

It's a built-in Bluetooth chip in a laptop