My goal is to have hcitool lescan running on Ubuntu 18.04 with a BLE 5.0 radio.
I upgraded the internal WiFi/Bluetooth card in a Dell Precision 7520 laptop from the original Qualcomm QCA61x4A (BLE 4.2) to Intel AX200NGW (BLE 5.0). Before the swap, no issues with hcitool lescan. After the hardware swap,
# hcitool lescan
Set scan parameters failed: Input/output error
# hciconfig hci0 down && hciconfig hci0 up && hcitool lescan
Set scan parameters failed: Input/output error
# hciconfig hci0 down && hciconfig hci0 up && service bluetooth restart && hcitool lescan
Could not open device: No such device
# hciconfig hci0 down && hciconfig hci0 up && service bluetooth restart && sleep 1 && hcitool lescan
Set scan parameters failed: Input/output error
# service bluetooth stop && hciconfig hci0 down && hciconfig hci0 up && hcitool lescan
Set scan parameters failed: Input/output error
Both before and after the hardware swap, both bluetoothctl and GUI interface work just fine.
# bluetoothctl
[bluetooth]# menu scan
[bluetooth]# clear
SetDiscoveryFilter success
[bluetooth]# back
[bluetooth]# scan on
Discovery started
Ubuntu GUI Settings – Bluetooth
Some basic System Information after installing new Intel AX200NGW
# hciconfig -a
hci0: Type: Primary Bus: USB
BD Address: 5C:80:B6:58:52:D6 ACL MTU: 1021:4 SCO MTU: 96:6
UP RUNNING PSCAN ISCAN INQUIRY
RX bytes:284131 acl:758 sco:6 events:4443 errors:0
TX bytes:747220 acl:72 sco:1 commands:3530 errors:0
Features: 0xbf 0xfe 0x0f 0xfe 0xdb 0xff 0x7b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH SNIFF
Link mode: SLAVE ACCEPT
Name: 'Ubuntu-1804-Laptop'
Class: 0x1c010c
Service Classes: Rendering, Capturing, Object Transfer
Device Class: Computer, Laptop
HCI Version: 5.0 (0x9) Revision: 0x100
LMP Version: 5.0 (0x9) Subversion: 0x100
Manufacturer: Intel Corp. (2)
# uname -a
Linux Ubuntu-1804-Laptop 5.3.0-26-generic #28~18.04.1-Ubuntu SMP Wed Dec 18 16:40:14 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
# bluetoothd -v
5.48
