You can try previous kernel versions your system had prior to the problem,
using this technique:
https://wiki.ubuntu.com/RecoveryMode
No need to select "recovery mode" but other older kernel versions should
still be listed for you to use.
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1710941
Title:
Bluetooth stopped working after update
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