I have recently dual-booted my laptop with Ubuntu 20.04 and Bluetooth is not working. I am able to use it in Windows though.
The Bluetooth settings page in Ubuntu says:
No Bluetooth Found - Plug in a dongle to use Bluetooth
dmesg | grep -i blue and lsusb | grep don't return any output.
This is the output of lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 13d3:56c9 IMC Networks HP TrueVision HD Camera Bus 001 Device 002: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Please help
Edit:
Computer: HP Laptop 15t-dw100
Output of lspci:
00:00.0 Host bridge: Intel Corporation Device 9b61 (rev 0c) 00:02.0 VGA compatible controller: Intel Corporation UHD Graphics (rev 02) 00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 0c) 00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model 00:12.0 Signal processing controller: Intel Corporation Comet Lake Thermal Subsytem 00:14.0 USB controller: Intel Corporation Device 02ed 00:14.2 RAM memory: Intel Corporation Device 02ef 00:15.0 Serial bus controller [0c80]: Intel Corporation Serial IO I2C Host Controller 00:16.0 Communication controller: Intel Corporation Comet Lake Management Engine Interface 00:17.0 RAID bus controller: Intel Corporation 82801 Mobile SATA Controller [RAID mode] 00:1c.0 PCI bridge: Intel Corporation Device 02bc (rev f0) 00:1d.0 PCI bridge: Intel Corporation Device 02b0 (rev f0) 00:1d.1 PCI bridge: Intel Corporation Device 02b1 (rev f0) 00:1d.4 PCI bridge: Intel Corporation Device 02b4 (rev f0) 00:1f.0 ISA bridge: Intel Corporation Device 0284 00:1f.3 Audio device: Intel Corporation Device 02c8 00:1f.4 SMBus: Intel Corporation Device 02a3 00:1f.5 Serial bus controller [0c80]: Intel Corporation Comet Lake SPI (flash) Controller 01:00.0 3D controller: NVIDIA Corporation GP108M [GeForce MX250] (rev a1) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15) 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter 04:00.0 Non-Volatile memory controller: Sandisk Corp Device 5009 (rev 01) 1 Answer
Finally problem solved.
The problem is with the RTL8821CE chip as @matigo pointed out
Installing the open-source driver by tomaspinho solved the Wi-Fi problem but Bluetooth still didn't work.
Running this solved the Bluetooth problem:
sudo modprobe btrtl sudo systemctl restart bluetooth sudo bluetoothctl >power on Hope this is helpful for others.
If this didn't solve the problem I would suggest going through the closed issues related to Bluetooth at tomaspinho's RTL8821CE GitHub repo.
