This was previously marked as duplicate of bug 1823150, which was actually resolved by upgrading BIOS, not the linux-firmware deb. Maybe you'd also like to do the same? From GigaByte's support site [1], there is already several new revisions available.
[1]: https://www.gigabyte.com/Motherboard/GA-Z170N-Gaming-5-rev-10 #support-dl-bios -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1824703 Title: Intel 8260 Bluetooth non-functioning, command timeouts To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1824703/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs