使用 Ubuntu 18.04 LTS 作为 Linux 新手。
正如标题所说，使用蓝牙耳机时 WiFi 速度会变慢。
这是便宜的华硕笔记本电脑，在 Ubuntu 上开箱即用。我的规格如下
H/W path Device Class Description
====================================================
system E402NA
/0 bus E402NA
/0/0 memory 64KiB BIOS
/0/e memory 2GiB System Memory
/0/e/0 memory 2GiB DIMM DDR3 Synchronous 1600 MHz (0.
/0/11 memory 112KiB L1 cache
/0/12 memory 2MiB L2 cache
/0/13 processor Intel(R) Celeron(R) CPU N3350 @ 1.10GHz
/0/100 bridge Celeron N3350/Pentium N4200/Atom E3900
/0/100/0.1 generic Intel Corporation
/0/100/2 display Intel Corporation
/0/100/e multimedia Celeron N3350/Pentium N4200/Atom E3900
/0/100/f communication Celeron N3350/Pentium N4200/Atom E3900
/0/100/12 storage Celeron N3350/Pentium N4200/Atom E3900
/0/100/13 bridge Celeron N3350/Pentium N4200/Atom E3900
/0/100/13/0 generic RTS5286 PCI Express Card Reader
/0/100/13/0.2 enp1s0f2 network RTL810xE PCI Express Fast Ethernet cont
/0/100/13.1 bridge Celeron N3350/Pentium N4200/Atom E3900
/0/100/13.1/0 wlp2s0 network QCA9565 / AR9565 Wireless Network Adapt
/0/100/15 bus Celeron N3350/Pentium N4200/Atom E3900
/0/100/15/0 usb1 bus xHCI Host Controller
/0/100/15/0/4 communication Bluetooth wireless interface
/0/100/15/0/5 multimedia USB2.0 VGA UVC WebCam
/0/100/15/1 usb2 bus xHCI Host Controller
/0/100/16 generic Celeron N3350/Pentium N4200/Atom E3900
/0/100/17 generic Celeron N3350/Pentium N4200/Atom E3900
/0/100/1c generic Celeron N3350/Pentium N4200/Atom E3900
/0/100/1f bridge Celeron N3350/Pentium N4200/Atom E3900
/0/100/1f.1 bus Celeron N3350/Pentium N4200/Atom E3900
编辑：@vidario 请求的附加信息
wlp2s0 IEEE 802.11 ESSID:"TP-Link_D236"
Mode:Managed Frequency:2.412 GHz Access Point: AC:84:C6:B3:D2:36
Bit Rate=65 Mb/s Tx-Power=14 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=70/70 Signal level=-12 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:41 Missed beacon:0
enp1s0f2 no wireless extensions.
lo no wireless extensions.
还向@heynnema 请求了更多信息
## sudo lshw -C network
*-network
description: Ethernet interface
product: RTL810xE PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0.2
bus info: pci@0000:01:00.2
logical name: enp1s0f2
version: 06
serial: b0:6e:bf:0c:ba:67
size: 10Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8402-1_0.0.1 10/26/11 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:22 ioport:e000(size=256) memory:91214000-91214fff memory:91210000-91213fff
*-network
description: Wireless interface
product: QCA9565 / AR9565 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 01
serial: 40:9f:38:5c:ce:a7
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=4.18.0-18-generic firmware=N/A ip=192.168.0.195 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:23 memory:91100000-9117ffff memory:91180000-9118ffff
##
grep -i bt /etc/modprobe.d/*
/etc/modprobe.d/alsa-base.conf:options bt87x index=-2
/etc/modprobe.d/ath9k.conf:options ath9k btcoex_enable=1
/etc/modprobe.d/blacklist-oss.conf:blacklist btaudio