Public bug reported:

Using kernel 6.11.0-17, Bluetooth works on first boot. If I reboot, GUI
settings shows Bluetooth Turned Off and the on/off slider is completely
inactive

Ubuntu 24.04.2 (fully upgraded)
Gnome 46 (Wayland)

GMKtec NucBox K2, AMD Ryzen™ 7 7735HS with Radeon™ Graphics × 16, Wifi
and bluetooth combined Mediatek mt7921

Bluetooth both first boot and reboot, performs flawlessly with Kernel
6.8.0-52 and earlier

I expected the Bluetooth adapter to be available upon a reboot with kernel 
6.11.0-17
The Bluetooth adapter was inactive and could not be turned on

The Mediatek card mt7921 is an internal combined wifi and bluetooth
device and the wifi is unaffected in all kernels

I can resuscitate the bluetooth device:-

Close applications and power off
Remove the power cable
Press and hold the power button for more than 30 seconds
Re-attach power cable
Boot the PC

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.11.0-17-generic 6.11.0-17.17~24.04.2
ProcVersionSignature: Ubuntu 6.11.0-17.17~24.04.2-generic 6.11.11
Uname: Linux 6.11.0-17-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Feb 25 17:35:46 2025
InstallationDate: Installed on 2024-04-26 (305 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
SourcePackage: linux-signed-hwe-6.11
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-signed-hwe-6.11 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug noble wayland-session

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https://bugs.launchpad.net/bugs/2100027

Title:
  Bluetooth failure on reboot - Kernel 6.11.0-17 - Mediatek 7921

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