Score:1

Bluetooth not working - no controller available

at flag

I have installed Ubuntu a year ago after I bought my laptop, and I have one issue with Bluetooth.

It's not working every time, it shows "BLUETOOTH NOT FOUND PLUG IN A DONGLE TO USE A BLUETOOTH". I have checked my Bluetooth is active and running but I can't use it.

enter image description here

It shows like this every time:

enter image description here

And I checked in bluetooth control to scan on it shows no default controller available. I have been struggling with this since I installed Ubuntu.

Pilot6 avatar
cn flag
If you tried everything, we can't help you. But you didn't thy to find out what is the BT device ;-)
Pilot6 avatar
cn flag
You didn't provide any information to work with.
Linux Genie avatar
tf flag
Can you please try these commands: $ sudo systemctl start hciuart $ sudo bluetoothctl
Rakesh Vemula avatar
at flag
to linux genie it is the result " Failed to start hciuart.service: Unit hciuart.service not found."
Rakesh Vemula avatar
at flag
what kind of information do you need
Jeremy31 avatar
ke flag
We could use results from terminal for `lspci -nnk | grep -iA3 net; lsusb; sudo dmesg | egrep -i 'blue|firm'`
Rakesh Vemula avatar
at flag
To Jeremy31 i have runned these commands in terminal and posting results in this link
Rakesh Vemula avatar
at flag
1-https://www.linkpicture.com/q/Screenshot-from-2023-01-09-19-20-55.png
Rakesh Vemula avatar
at flag
2-https://www.linkpicture.com/q/Screenshot-from-2023-01-09-19-21-15.png
Rakesh Vemula avatar
at flag
3-https://www.linkpicture.com/q/Screenshot-from-2023-01-09-19-22-42.png 4-https://www.linkpicture.com/q/Screenshot-from-2023-01-09-19-23-34.png
Jeremy31 avatar
ke flag
You don't have Bluetooth hardware so Bluetooth doesn't work
Rakesh Vemula avatar
at flag
No i have Bluetooth hardware my laptop had Bluetooth and i have used it before installing Ubuntu in windows
us flag
https://bugzilla.kernel.org/show_bug.cgi?id=215167
Score:0
us flag

The interim workaround is to perform the following which will flush the command history for the device that's failing to respond:

modprobe -r btusb && modprobe btusb

These commands must be run as root.

enter image description here

Then, bluetooth works. I am not sure for exactly how long, as it still seems to go out again after awhile.

The Ubuntu bug to track this (please ignore my link in the comments above as that is LKML territory) is, I believe, https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1960016.

I sit in a Tesla and translated this thread with Ai:

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