我在联想笔记本电脑上运行 Ubuntu 18.04，我的 wifi 出现了很多问题。最初，我安装了 Wicd，这使连接变得更好，但却导致 wpa_supplicant 失败，从而引发问题。现在我回到网络管理器，当我启动时，我立即获得了良好的互联网速度，但随后我的 wifi 几乎就像“锁定”了一样，速度降至 1mbps 以下。
以下是我的信息：
# hwinfo --wlan --short
network:
wlp9s0 Intel Centrino Wireless-N 1000 BGN
# uname -a
Linux cornel-ThinkPad-E520 4.15.0-91-generic #92-Ubuntu SMP Fri Feb 28 11:09:48 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.4 LTS
Release: 18.04
Codename: bionic
→ lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b4)
00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b4)
00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b4)
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b4)
00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b4)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port Mobile SATA AHCI Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M]
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)
04:00.0 System peripheral: Ricoh Co Ltd MMC/SD Host Controller (rev 07)
09:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000 [Condor Peak]
→ sudo iwconfig wlp9s0 | grep Quality
Link Quality=57/70 Signal level=-53 dBm
→ ifconfig
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:72:7e:6d:f9 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp3s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether f0:de:f1:6b:92:b7 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 1918 bytes 170637 (170.6 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1918 bytes 170637 (170.6 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp9s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.8.5 netmask 255.255.255.0 broadcast 192.168.8.255
inet6 fe80::bd97:1f4b:4f54:caa1 prefixlen 64 scopeid 0x20<link>
ether 8c:a9:82:be:fe:6a txqueuelen 1000 (Ethernet)
RX packets 26594 bytes 24943171 (24.9 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 24914 bytes 11128513 (11.1 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
我不知道该如何修复 Wi-Fi，但这确实让我很沮丧，因为我已经挣扎了一段时间。