我有一台惠普笔记本电脑，配有两张无线网卡，一张集成在 USB 端口上，另一张连接在 USB 端口上。我尝试打开 wifi 热点，并设法用我的智能手机连接到它。然后我注意到互联网连接被限制在 1Mb/s 左右。下面您将看到我的设置。我使用 usd wifi 连接到 AP 并使用内部卡作为热点：
lsusb
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 003: ID 093a:2521 Pixart Imaging, Inc. Optical Mouse
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 004: ID 04f2:b35f Chicony Electronics Co., Ltd
Bus 003 Device 005: ID 0bda:8187 Realtek Semiconductor Corp. RTL8187 Wireless Adapter
Bus 003 Device 002: ID 0461:0010 Primax Electronics, Ltd HP PR1101U / Primax PMX-KPR1101U Keyboard
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
lshw -C Network
*-usb:1
description: Wireless interface
product: USB2.0 WLAN Adapter
vendor: Wireless Manufacturer
physical id: 2
bus info: usb@3:2
logical name: wlx00871a1504b5
version: 2.00
serial: 00:87:1a:15:04:b5
capabilities: usb-2.00 ethernet physical wireless
configuration: broadcast=yes driver=rtl8187 driverversion=4.13.0-37-generic firmware=N/A ip=192.168.1.11 link=yes maxpower=500mA multicast=yes speed=480Mbit/s wireless=IEEE 802.11
*-network
description: Wireless interface
product: AR9485 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:01:00.0
logical name: wlo1
version: 01
serial: 2c:d0:5a:9e:6b:c2
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=4.13.0-37-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:16 memory:52500000-5257ffff memory:52580000-5258ffff
*-network
description: Ethernet interface
product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: eno1
version: 05
serial: 74:46:a0:86:92:0f
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=rtl_nic/rtl8105e-1.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:25 ioport:3000(size=256) memory:52404000-52404fff memory:52400000-52403fff
cat /proc/version
Linux version 4.13.0-37-generic (buildd@lcy01-amd64-026) (gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu3.2)) #42-Ubuntu SMP Wed Mar 7 14:13:23 UTC 2018
iwconfig
eno1 no wireless extensions.
wlx00871a1504b5 IEEE 802.11 ESSID:"myAPname"
Mode:Managed Frequency:2.412 GHz Access Point: C4:A8:1D:37:BE:20
Bit Rate=18 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=57/70 Signal level=-53 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:1300 Invalid misc:2086 Missed beacon:0
lo no wireless extensions.
wlo1 IEEE 802.11 ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off