When trying to play any type of audio over my Bluetooth Earphones Wifi speeds drop below 100Kbps. When I stop the audio the speed is back to normal at 25Mbps. I tested it in on other machines and did not face this issue.
I have tried disabling coexistence in iwlwifi as per this answer. I have read about bluetooth and wifi using the same band (2.4Ghz), however this problem occurs only on my laptop. I also updated linux kernel from 4.16 to 5.4. Also, I thought it might be a driver issue but I can't seem to find correct drivers.
Operating system -
Ubuntu 18.04, Kernel - 5.4.0-52-generic
These are the drivers and configuration -
$ `hciconfig -a`
hci0: Type: Primary Bus: USB
BD Address: 2C:33:7A:00:D1:E4 ACL MTU: 820:8 SCO MTU: 255:16
UP RUNNING PSCAN
RX bytes:269077 acl:136 sco:0 events:37073 errors:0
TX bytes:21963711 acl:35474 sco:0 commands:1534 errors:0
Features: 0xff 0xff 0xff 0xfe 0xdb 0xff 0x7b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF PARK
Link mode: SLAVE ACCEPT
Name: 'A12'
Class: 0x1c010c
Service Classes: Rendering, Capturing, Object Transfer
Device Class: Computer, Laptop
HCI Version: 4.0 (0x6) Revision: 0xe2f
LMP Version: 4.0 (0x6) Subversion: 0x9f73
Manufacturer: Realtek Semiconductor Corporation (93)
Output from -
lshw -class network
*-network
description: Wireless interface
product: RTL8723BE PCIe Wireless Network Adapter
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:09:00.0
logical name: wlo1
version: 00
serial: 2c:33:7a:00:d1:e3
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rtl8723be driverversion=5.4.0-52-generic firmware=N/A ip=192.168.0.199 latency=0 link=yes multicast=yes wireless=IEEE 802.11
