This is very much a recurring problem with Linux.
You need to find out the type of your hardware bluetooth controller and then install the driver (if there is any).
You can find the type by typing in a terminal sudo dmesg | grep -i Blue
. Look for a line that looks kind of like this:
[ 655.928270] Bluetooth: hci1: BCM20702A1 (001.002.014) build 0000
[ 655.930889] Bluetooth: hci1: BCM20702A1 'brcm/BCM20702A1-0a5c-21e8.hcd' Patch
[ 657.155223] Bluetooth: hci1: BCM20702A1 (001.002.014) build 1764
Or anything that looks like it might contain the type of the hardware controller. Try typing the type into Google if the output of dmesg does not tell you the company.
Best case would be if there are any more packages you can install from Ubuntu repositories. If you know the company, like Realtek or Broadcom, you might be able to locate a repository through searching aptitude (if you don't have aptitude, install it by typing sudo apt-get install aptitude
). Assuming the company is Broadcom, you would type:
sudo aptitude search broadcom
Your output might be something like
i broadcom-sta-common - Common files for the Broadcom STA Wireless driver
p broadcom-sta-dkms - dkms source for the Broadcom STA Wireless driver
p broadcom-sta-modules
p broadcom-sta-source - Source for the Broadcom STA Wireless driver
p
means the package is not installed but available. So, if any of those say Wireless driver, install them typing sudo aptitude install broadcom-sta-dkms
just for example.
If this solves your issues that's great, otherwise: Best of luck.
You would need to type the type into Google adding "driver installation Linux" or similar. The installation process can look many ways so I can't tell you.
The reason for this is probably that Ubuntu developers decided to discontinue some drivers, but I'm not that well informed on the packages Ubuntu ships and how they decide, so I can't tell you why the problem suddenly occurred with upgrading. It is not a first anyway.