Ubuntu 22.04下RTL8192CE无线网卡下载速度过慢问题求助

各位好，我来求助一个无线网卡的问题：早在Ubuntu 20.04的时候我就碰到了WiFi速度慢的问题，当时试过各种方法都没解决。本来升级到22.04以为能自动修复，结果现在还是一样的情况——只有下载速度慢，上传速度是正常的。现在WiFi下载只有大概30Mbps，但实际应该能到300Mbps；而有线连接完全没问题，下载能跑到500Mbps左右。

我个人怀疑是无线网卡的驱动有问题，希望在这里能找到解决办法，如果实在不行的话，我就打算把这个问题作为bug上报给Canonical了。

下面是我收集的一些系统和网卡相关的命令输出，供大家参考：

lspci 输出 #

00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] RS780 Host Bridge
00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780 PCI to PCI bridge (ext gfx port 0)
00:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 0)
00:07.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 3)
00:0a.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 5)
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [IDE mode]
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:12.1 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0 USB OHCI1 Controller
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:13.1 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0 USB OHCI1 Controller
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller (rev 3c)
00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 IDE Controller
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 LPC host controller
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge
00:14.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 5
01:00.0 VGA compatible controller: NVIDIA Corporation GM107 [GeForce GTX 750 Ti] (rev a2)
01:00.1 Audio device: NVIDIA Corporation GM107 High Definition Audio Controller [GeForce 940MX] (rev a1)
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8192CE PCIe Wireless Network Adapter (rev 01)
03:00.0 USB controller: ASMedia Technology Inc. ASM1042A USB 3.0 Host Controller
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 09)

nmcli device wifi list 输出 #

IN-USE  BSSID              SSID                            MODE   CHAN  RATE        SIGNAL  BARS  SECURITY
*       XXXXXXXXXXXXXXXXX  ARRIS-15D1                      Infra  8     270 Mbit/s  94      ▂▄▆█  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  11    260 Mbit/s  89      ▂▄▆█  WPA2
XXXXXXXXXXXXXXXXX  Kavika2019                      Infra  11    260 Mbit/s  87      ▂▄▆█  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  11    260 Mbit/s  87      ▂▄▆█  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  11    260 Mbit/s  87      ▂▄▆█  WPA2 802.1X
XXXXXXXXXXXXXXXXX  --                              Infra  6     130 Mbit/s  79      ▂▄▆_  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  1     195 Mbit/s  77      ▂▄▆_  WPA1 WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  6     130 Mbit/s  77      ▂▄▆_  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  6     130 Mbit/s  77      ▂▄▆_  WPA1 WPA2 802.1X
XXXXXXXXXXXXXXXXX  carlos                          Infra  11    195 Mbit/s  62      ▂▄▆_  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  11    195 Mbit/s  62      ▂▄▆_  WPA1 WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  11    195 Mbit/s  62      ▂▄▆_  WPA1 WPA2 802.1X
XXXXXXXXXXXXXXXXX  --                              Infra  1     195 Mbit/s  57      ▂▄▆_  WPA1 WPA2 802.1X
XXXXXXXXXXXXXXXXX  HOME-7A55-2.4                   Infra  1     195 Mbit/s  57      ▂▄▆_  WPA1 WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  1     195 Mbit/s  57      ▂▄▆_  WPA1 WPA2
XXXXXXXXXXXXXXXXX  Daxs House                      Infra  11    195 Mbit/s  57      ▂▄▆_  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  11    195 Mbit/s  57      ▂▄▆_  WPA1 WPA2 802.1X
XXXXXXXXXXXXXXXXX  --                              Infra  11    260 Mbit/s  54      ▂▄__  WPA2 802.1X
XXXXXXXXXXXXXXXXX  Pumpkin                         Infra  11    260 Mbit/s  52      ▂▄__  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  11    260 Mbit/s  52      ▂▄__  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  11    260 Mbit/s  52      ▂▄__  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  11    260 Mbit/s  49      ▂▄__  WPA2
XXXXXXXXXXXXXXXXX  HP-Print-E2-Officejet Pro 8600  Infra  6     54 Mbit/s   47      ▂▄__  WPA2
XXXXXXXXXXXXXXXXX  Cfyuuy6fff                      Infra  11    260 Mbit/s  47      ▂▄__  WPA2
XXXXXXXXXXXXXXXXX  --                              Infra  10    270 Mbit/s  40      ▂▄__  WPA2
XXXXXXXXXXXXXXXXX  HOME-EC92                       Infra  11    270 Mbit/s  40      ▂▄__  WPA1 WPA2

ip link 输出 #

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp4s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
    link/ether XX:XX:XX:XX:XX:XX brd ff:ff:ff:ff:ff:ff
3: wlp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT group default qlen 1000
    link/ether XX:XX:XX:XX:XX brd ff:ff:ff:ff:ff:ff

iwconfig 输出 #

lo        no wireless extensions.

enp4s0    no wireless extensions.

wlp2s0    IEEE 802.11  ESSID:"ARRIS-15D1"  
          Mode:Managed  Frequency:2.447 GHz  Access Point: XX:XX:XX:XX:XX:XX   
          Bit Rate=144.4 Mb/s   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:on
          Link Quality=66/70  Signal level=-44 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:102   Missed beacon:0

补充信息 #

lspci -nnk | grep 0280 -A3 输出

02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8192CE PCIe Wireless Network Adapter [10ec:8178] (rev 01)
Subsystem: ASUSTeK Computer Inc. RTL8192CE PCIe Wireless Network Adapter [1043:85e3]
Kernel driver in use: rtl8192ce
Kernel modules: rtl8192ce

iwlist wlp2s0 freq 输出

wlp2s0    11 channels in total; available frequencies :
          Channel 01 : 2.412 GHz
          Channel 02 : 2.417 GHz
          Channel 03 : 2.422 GHz
          Channel 04 : 2.427 GHz
          Channel 05 : 2.432 GHz
          Channel 06 : 2.437 GHz
          Channel 07 : 2.442 GHz
          Channel 08 : 2.447 GHz
          Channel 09 : 2.452 GHz
          Channel 10 : 2.457 GHz
          Channel 11 : 2.462 GHz
          Current Frequency:2.447 GHz (Channel 8)

另外我还有个疑问：这个连接速度（Bit Rate=144.4 Mb/s）到底是什么意思？为什么是144Mbps？我以为我的路由器支持300Mbps的速度，求解惑。

备注：内容来源于stack exchange，提问作者James1