我的 Ubuntu 16.04 内置有 BT-253 蓝牙 2.2 模块，无法发现新买的蓝牙鼠标。如果这很重要，它无法看到带有蓝牙 4.2 的小米 Mi2 双频鼠标。我的旧款华硕 U50-Vg 可以发现其他蓝牙设备，甚至带有蓝牙 5.0，也可以被其他设备发现和配对。蓝牙鼠标也可以被其他设备发现和配对。
驱动程序似乎部分“工作”，因为它加载并发现了一些设备。我的目的显然是最终发现这个鼠标，我不确定我应该怎么做：尝试另一个内核、btusb 驱动程序、固件或其他东西。
我目前所做的：
(base) 10:19:50 ~$ uname -r
4.15.0-128-generic
(base) 10:19:58 ~$ lsusb
...
Bus 005 Device 002: ID 0b05:1751 ASUSTek Computer, Inc. BT-253 Bluetooth Adapter
...
(base) 10:22:03 ~$ usb-devices
...
T: Bus=05 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0001 Rev=04.15
S: Manufacturer=Linux 4.15.0-128-generic uhci_hcd
S: Product=UHCI Host Controller
S: SerialNumber=###
C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
T: Bus=05 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0b05 ProdID=1751 Rev=02.35
S: Manufacturer=Broadcom Corp
S: Product=BT-253
S: SerialNumber=###
C: #Ifs= 4 Cfg#= 1 Atr=e0 MxPwr=0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I: If#= 3 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=00 Driver=(none)
...
(base) 10:23:07 ~$ sudo service bluetooth status
[sudo] password for ###:
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2020-12-27 08:49:00; 1h 36min ago
Docs: man:bluetoothd(8)
Main PID: 808 (bluetoothd)
Status: "Running"
CGroup: /system.slice/bluetooth.service
└─808 /usr/lib/bluetooth/bluetoothd
Dec 27 08:49:00 ###-U50Vg bluetoothd[808]: Not enough free handles to register service
Dec 27 08:49:00 ###-U50Vg bluetoothd[808]: Not enough free handles to register service
Dec 27 08:49:00 ###-U50Vg bluetoothd[808]: Not enough free handles to register service
Dec 27 08:49:00 ###-U50Vg bluetoothd[808]: Current Time Service could not be registered
Dec 27 08:49:00 ###y-U50Vg bluetoothd[808]: gatt-time-server: Input/output error (5)
Dec 27 08:49:00 ###-U50Vg bluetoothd[808]: Not enough free handles to register service
Dec 27 08:49:00 ###-U50Vg bluetoothd[808]: Not enough free handles to register service
Dec 27 08:49:00 ###-U50Vg bluetoothd[808]: Sap driver initialization failed.
Dec 27 08:49:00 ###-U50Vg bluetoothd[808]: sap-server: Operation not permitted (1)
Dec 27 08:49:00 v-U50Vg systemd[1]: Started Bluetooth service.
(base) 10:25:14 ~$ dmesg | grep -i blue
[ 3.575218] Bluetooth: Core ver 2.22
[ 3.575243] Bluetooth: HCI device and connection manager initialized
[ 3.575247] Bluetooth: HCI socket layer initialized
[ 3.575250] Bluetooth: L2CAP socket layer initialized
[ 3.575257] Bluetooth: SCO socket layer initialized
[ 5.854168] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 5.854169] Bluetooth: BNEP filters: protocol multicast
[ 5.854175] Bluetooth: BNEP socket layer initialized
(base) 10:26:03 ~$
(base) 10:26:03 ~$ rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
(base) 10:26:29 ~$
(base) 10:26:29 ~$ bluetoothctl
[NEW] Controller (MAC address) ###-U50Vg [default]
[bluetooth]# discoverable on
Changing discoverable on succeeded
[CHG] Controller (MAC address) Discoverable: yes
[bluetooth]# pairable on
Changing pairable on succeeded
[bluetooth]# scan on
Discovery started
[CHG] Controller (MAC address) Discovering: yes
[NEW] Device 38:E6:0A:42:F6:FB Redmi
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -75
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -88
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -73
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -84
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -74
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -90
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -76
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -85
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -76
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -86
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -77
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -86
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -76
[CHG] Controller (MAC address) Discoverable: no
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -88
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -75
[CHG] Device 38:E6:0A:42:F6:FB RSSI: -83
...
(base) 10:37:29 ~$ sudo nano /etc/bluetooth/main.conf
...
# AutoEnable defines option to enable all controllers when they are found.
# This includes adapters present on start as well as adapters that are plugged
# in later on. Defaults to 'false'.
AutoEnable=true
(base) 19:07:33 ~$ lspci -knn | grep Net -A3; lsusb
03:00.0 Network controller [0280]: Intel Corporation WiFi Link 5100 [8086:4232]
Subsystem: Intel Corporation WiFi Link 5100 ABG [8086:1206]
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
Bus 002 Device 003: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 002: ID 2717:5013
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 064e:a116 Suyin Corp. UVC 1.3MPixel WebCam
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 002: ID 0b05:1751 ASUSTek Computer, Inc. BT-253 Bluetooth Adapter
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
对于我下一步该做什么，我将不胜感激！
免责声明： 我见过这和这和这以及所有其他方法。它们对我不起作用，因为固件加载方式似乎已经改变。我尝试并成功从 Windows Broadcom 驱动程序中提取固件，但我不知道在哪里/是否插入这些部分hcd。