sudo apt install git build-essential dkms
git clone https://github.com/jeremyb31/newbtfix-4.15.git
sudo dkms add ./newbtfix-4.15
sudo dkms install btusb/4.0

02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd.
RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136]
(rev 05)
Subsystem: Lenovo RTL810xE PCI Express Fast Ethernet controller
[17aa:3977]
Kernel driver in use: r8169
Kernel modules: r8169
03:00.0 Network controller [0280]: Qualcomm Atheros AR9485 Wireless
Network Adapter [168c:0032] (rev 01)
Subsystem: Lenovo AR9485 Wireless Network Adapter [17aa:3218]
Kernel driver in use: ath9k
Kernel modules: ath9k

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 001 Device 005: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129
    Card Reader Controller
Bus 001 Device 003: ID 046d:c084 Logitech, Inc.
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching
Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 13d3:5170 IMC Networks
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

4.15.0-23-generic

[    0.029075] Spectre V2 : Enabling Restricted Speculation for

firmware calls
[    0.052904] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[    5.632476] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS

[    6.434524] usb 1-1.3: Product: Bluetooth USB Host Controller
[   43.358752] Bluetooth: Core ver 2.22
[   43.358769] Bluetooth: HCI device and connection manager initialized
[   43.358772] Bluetooth: HCI socket layer initialized
[   43.358774] Bluetooth: L2CAP socket layer initialized
[   43.358779] Bluetooth: SCO socket layer initialized
[   60.474347] usb 1-1.3: Product: Bluetooth USB Host Controller
[   68.645867] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   68.645869] Bluetooth: BNEP filters: protocol multicast
[   68.645873] Bluetooth: BNEP socket layer initialized
[   71.196092] Bluetooth: hci0: command 0x201c tx timeout
[   73.212009] Bluetooth: hci0: command 0x1002 tx timeout
[   75.228002] Bluetooth: hci0: command 0x0c56 tx timeout
[   77.244110] Bluetooth: hci0: command 0x0c45 tx timeout
[   79.260042] Bluetooth: hci0: command 0x0c58 tx timeout
[   81.276072] Bluetooth: hci0: command tx timeout
[  109.177590] Bluetooth: RFCOMM TTY layer initialized
[  109.177598] Bluetooth: RFCOMM socket layer initialized
[  109.177604] Bluetooth: RFCOMM ver 1.11
[ 1643.282536] usb 1-1.3: Product: Bluetooth USB Host Controller
[ 1645.392304] Bluetooth: hci0: command 0x0c52 tx timeout
[ 1647.404256] Bluetooth: hci0: command 0x0c45 tx timeout
[ 1649.420176] Bluetooth: hci0: command 0x0c58 tx timeout
[ 1651.436080] Bluetooth: hci0: command 0x1004 tx timeout
[ 1668.673193] usb 1-1.3: device firmware changed
[ 1668.878929] usb 1-1.3: Product: Bluetooth USB Host Controller
[ 1690.825914] usb 1-1.3: Product: Bluetooth USB Host Controller
[ 1693.163783] Bluetooth: hci0: command 0x0c52 tx timeout
[ 2152.790808] Bluetooth: hci0: command 0x0405 tx timeout
[ 2177.961681] bluetoothd[1118]: segfault at 0 ip 000055ebbc27e576 sp 00007ffc9fd07280 error 4 in bluetoothd[55ebbc215000+f3000]
[ 2188.907517] usb 1-1.3: Product: Bluetooth USB Host Controller
[ 2190.997040] Bluetooth: hci0: command 0x2002 tx timeout
[ 2193.012956] Bluetooth: hci0: command 0x2003 tx timeout
[ 2195.028901] Bluetooth: hci0: command 0x201c tx timeout
[ 2197.044724] Bluetooth: hci0: command 0x1002 tx timeout
[ 2199.060655] Bluetooth: hci0: command 0x0c52 tx timeout
[ 2201.076583] Bluetooth: hci0: command tx timeout
[ 2483.045911] usb 1-1.3: Product: Bluetooth USB Host Controller
[ 2485.131481] Bluetooth: hci0: command 0x2003 tx timeout
[ 2487.143463] Bluetooth: hci0: command 0x201c tx timeout
[ 2489.159403] Bluetooth: hci0: command 0x1002 tx timeout
[ 2491.175235] Bluetooth: hci0: command 0x0c52 tx timeout
[ 2493.191159] Bluetooth: hci0: command 0x0c45 tx timeout
[ 2495.207062] Bluetooth: hci0: command tx timeout