Ubuntu 22.04 Settings: "No Bluetooth Found - Plug in a dongle to use Bluetooth"

Yesterday I installed Ubuntu 22.04.1 LTS on my HP laptop model 15-dy2xxx. Before I had triple-booted with Windows 10, Ubuntu 16.04, and Ubuntu 20.04 for various OS-dependentsoftware, but this time I chose the "Erase disk and install Ubuntu" option to keep everything cleaner. I installed it with an ISO file from ubuntu.com by creating a bootable USB with Rufus on Windows, following the official tutorials: https://ubuntu.com/tutorials/install-ubuntu-desktop and https://ubuntu.com/tutorials/create-a-usb-stick-on-windows. Installation and setup went relatively smoothly.

But today I tried to use Bluetooth for the first time, and in the Bluetooth section of Settings all I see is the message "No Bluetooth Found - Plug in a dongle to use Bluetooth". The switch to enable Bluetooth can't be clicked on. I used Bluetooth just fine on Ubuntu 20.04, I've only had issues since reinstalling the new Ubuntu version.

A lot of answers I found online are for older versions of Ubuntu, which don't seem to be helpful because again I had no issues with my previous installation.

The closest I've gotten to a solution is as follows. When I run these status commands I get this output:

$ dmesg | grep -i blue$ sudo systemctl status bluetooth.service○ bluetooth.service - Bluetooth service     Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)     Active: inactive (dead)       Docs: man:bluetoothd(8)Aug 31 19:39:03 zach-HP-Laptop-15-dy2xxx systemd[1]: Condition check resulted in Bluetooth service being skipped.

Then I run these commands in order (any other order causes error messages as far as I can tell):

$ sudo modprobe btusb$ sudo rmmod btusb$ sudo systemctl start bluetooth

And the output of the previous set of commands changes to this:

$ dmesg | grep -i blue[  161.311841] Bluetooth: Core ver 2.22[  161.311868] NET: Registered PF_BLUETOOTH protocol family[  161.311868] Bluetooth: HCI device and connection manager initialized[  161.311871] Bluetooth: HCI socket layer initialized[  161.311873] Bluetooth: L2CAP socket layer initialized[  161.311875] Bluetooth: SCO socket layer initialized[  170.442648] Bluetooth: BNEP (Ethernet Emulation) ver 1.3[  170.442651] Bluetooth: BNEP filters: protocol multicast[  170.442654] Bluetooth: BNEP socket layer initialized$ sudo systemctl status bluetooth.service● bluetooth.service - Bluetooth service     Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)     Active: active (running) since Wed 2022-08-31 20:10:23 PDT; 2min 17s ago       Docs: man:bluetoothd(8)   Main PID: 3482 (bluetoothd)     Status: "Running"      Tasks: 1 (limit: 9029)     Memory: 1.8M        CPU: 29ms     CGroup: /system.slice/bluetooth.service└─3482 /usr/lib/bluetooth/bluetoothdAug 31 20:10:23 zach-HP-Laptop-15-dy2xxx systemd[1]: Starting Bluetooth service...Aug 31 20:10:23 zach-HP-Laptop-15-dy2xxx bluetoothd[3482]: Bluetooth daemon 5.64Aug 31 20:10:23 zach-HP-Laptop-15-dy2xxx systemd[1]: Started Bluetooth service.Aug 31 20:10:23 zach-HP-Laptop-15-dy2xxx bluetoothd[3482]: Starting SDP serverAug 31 20:10:23 zach-HP-Laptop-15-dy2xxx bluetoothd[3482]: Bluetooth management interface 1.21 initialized

Which implies that the problem has been fixed, or at least part of it. Unfortunately, I have the same message in the Settings menu, and the changes seem to get reverted if I restart my laptop (the status commands switch back to the first set of outputs). I don't know enough about this software to know what to do from this point.

Some of the other things I've tried (some of them have overlap):

• https://askubuntu.com/a/1404004/1627995 - No effect.
• https://askubuntu.com/a/649505/1627995 - HTTP 404 error when running wget.
• https://askubuntu.com/a/1403819/1627995 - No effect. I also tried the commands in that answer's comments, but sudo hciconfig hci0 down gives me the output Can't get device info: No such device. I tried looking up solutions for this, but they all seemed to be about Raspberry Pis or different distros.
• https://askubuntu.com/a/1179543/1627995 - No effect.
• https://askubuntu.com/a/1304456/1627995 - No effect.
• https://askubuntu.com/a/1161750/1627995 - Switched to a Realtek WiFi driver option, no effect.

Outputs from various suggested commands:

$ sudo apt upgradeReading package lists... DoneBuilding dependency tree... DoneReading state information... DoneCalculating upgrade... Done0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

$ lspci -knn | grep Net -A30000:01:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821]    DeviceName: Realtek Wireless LAN + BT    Subsystem: Hewlett-Packard Company RTL8821CE 802.11ac PCIe Wireless Network Adapter [103c:884d]    Kernel driver in use: rtw_8821ce    Kernel modules: rtw88_8821ce10000:e0:1d.0 PCI bridge [0604]: Intel Corporation Tiger Lake-LP PCI Express Root Port #9 [8086:a0b0] (rev 20)

$ lsusb;Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hubBus 001 Device 003: ID 04f3:0c00 Elan Microelectronics Corp. ELAN:ARM-M4Bus 001 Device 002: ID 0408:5365 Quanta Computer, Inc. HP TrueVision HD CameraBus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

$ rfkill list all0: phy0: Wireless LAN    Soft blocked: no    Hard blocked: no

$ ls -lah /etc/modprobe.d/total 60Kdrwxr-xr-x   2 root root 4.0K Aug 31 18:55 .drwxr-xr-x 140 root root  12K Aug 31 17:45 ..-rw-r--r--   1 root root 2.5K Feb 22  2021 alsa-base.conf-rw-r--r--   1 root root  154 Oct  7  2021 amd64-microcode-blacklist.conf-rw-r--r--   1 root root  325 Aug 17  2021 blacklist-ath_pci.conf-rw-r--r--   1 root root 1.5K Aug 17  2021 blacklist.conf-rw-r--r--   1 root root  210 Aug 17  2021 blacklist-firewire.conf-rw-r--r--   1 root root  677 Aug 17  2021 blacklist-framebuffer.conf-rw-r--r--   1 root root  156 Feb 22  2021 blacklist-modem.conflrwxrwxrwx   1 root root   41 Aug 30 18:45 blacklist-oss.conf -> /lib/linux-sound-base/noOSS.modprobe.conf-rw-r--r--   1 root root  583 Aug 17  2021 blacklist-rare-network.conf-rw-r--r--   1 root root  154 May 15 23:44 intel-microcode-blacklist.conf-rw-r--r--   1 root root  347 Aug 17  2021 iwlwifi.conf-rw-r--r--   1 root root   23 Sep 26  2017 libopenni-sensor-pointclouds0.conf

$ sudo /etc/init.d/bluetooth restartRestarting bluetooth (via systemctl): bluetooth.service.

$ hcitool scanDevice is not available: No such device

$ sudo hciconfig hci0 inqmode 0Can't get device info: No such device

$ hcitool devDevices:

To me it looks like driver(s) can't find the Bluetooth adapter, but I'm not sure what to do about that.