After 7 days of testing, investigation and general scrutiny, an unexpected outcome bubbled to the surface.
Good news first:- Bluetooth works perfectly with kernel 6.11.0-21 Bluetooth works perfectly with kernel 6.8.0-52 Unusual discovery:- Bluetooth works perfectly with kernel 6.11.0-21 - only when both TPM and Secure Boot are enabled Bluetooth works perfectly with kernel 6.8.0-52 - TPM and Secure Boot can be disabled and it still works perfectly Having used Ubuntu for many years with both TPM and Secure Boot disabled, it's surprising that I now have to enable both TPM and Secure Boot to use Bluetooth with a recent kernel. Lastly, following this discovery, I don't know where the Bluetooth problem resides:- UEFI Firmware? Kernel? Mediatek mt7921 device? TPM? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2100027 Title: Bluetooth failure on reboot - Kernel 6.11.0-17 - Mediatek 7921 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2100027/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
