I have built the 2 kernels and can confirm that b2cc23398e8166b38f8715026273503b081c2a7a is the offending commit.
I have already opened a bug report here : https://bugzilla.kernel.org/show_bug.cgi?id=210453 Is this the good way ? What should I add more ? ** Bug watch added: Linux Kernel Bug Tracker #210453 https://bugzilla.kernel.org/show_bug.cgi?id=210453 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906515 Title: Bluetooth : No device found (rtl8822cu) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906515/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs