我查看了很多解决方案，但似乎没有一个能够解决我的问题。
使用任何程序下载大文件时，我的 wifi 都会掉线（不会断开连接）。加密狗是 Belkin N300 (F9L1002v1)，已关闭省电功能。不是路由器的问题。通常我必须断开并重新连接加密狗才能使其重新开始工作。
lshw -class network
*-network
description: Network controller
product: BCM4360 802.11ac Wireless Network Adapter
vendor: Broadcom Limited
physical id: 0
bus info: pci@0000:02:00.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=bcma-pci-bridge latency=0
resources: irq:18 memory:feaf8000-feafffff memory:fe800000-fe9fffff
*-network
description: Ethernet interface
product: NetXtreme BCM5761 Gigabit Ethernet PCIe
vendor: Broadcom Limited
physical id: 0
bus info: pci@0000:03:00.0
logical name: enp3s0
version: 10
serial: d0:67:e5:e7:39:42
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 firmware=5761-v3.73 latency=0 link=no multicast=yes port=twisted pair
resources: irq:24 memory:febf0000-febfffff memory:febe0000-febeffff
*-network
description: Wireless interface
physical id: 1
bus info: usb@1:4
logical name: wlxc05627e08e22
serial: c0:56:27:e0:8e:22
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=r8712u ip=192.168.1.39 multicast=yes wireless=IEEE 802.11bgn
lsusb
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 002: ID 413c:2113 Dell Computer Corp.
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 011: ID 050d:845a Belkin Components F7D2101 802.11n Surf & Share Wireless Adapter v1000 [Realtek RTL8192SU]
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] RS880 Host Bridge
00:01.0 PCI bridge: Dell Device 9602
00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780 PCI to PCI bridge (ext gfx port 0)
00:09.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 4)
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [AHCI 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 10h Processor HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Address Map
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Link Control
01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS880 [Radeon HD 4200]
02:00.0 Network controller: Broadcom Limited BCM4360 802.11ac Wireless Network Adapter (rev 03)
03:00.0 Ethernet controller: Broadcom Limited NetXtreme BCM5761 Gigabit Ethernet PCIe (rev 10)
dmesg | grep -i firmware
[ 117.906958] usb 1-4: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[22626.863271] usb 1-4: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[86259.292461] usb 1-4: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[115481.231040] usb 1-4: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[122922.556929] usb 1-4: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[171238.283843] usb 1-4: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[171623.085302] usb 1-4: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[173323.454846] usb 1-4: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[174063.517332] usb 1-4: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin
“
答案1
我在 Ubuntu 20.04 中遇到了这个问题。适配器工作正常了一段时间，然后就掉线了（大量下载确实会导致这个问题）。卸载模块（modprobe -r r8712u）也会挂起。我可以使用以下两种方法之一“修复”这个问题：
- 拔下 USB 适配器并重新插入。
或者
- 卸载模块（modprobe -r r8712u）并重新加载（modprode r8712u）。
我通过禁用 r8712u 模块上的“ht_enable”参数解决了该问题。我不知道该模块是什么，也找不到有关 r8712u 模块参数的任何参考资料。我还禁用了 power_mgnt，因为很多人似乎都遇到了这个问题（我还没有尝试重新启用它）。
您可以使用此命令检查模块参数的当前值：
systool -vm r8712u
以下是禁用 ht_enable 和 power_mgnt 参数的命令：
echo "options r8712u power_mgnt=0 ht_enable=0" | sudo tee /etc/modprobe.d/r8712u.conf
然后你必须重新启动或重新加载模块，如下所示
modprobe -vr r8712u
modprode -v r8712u
这是论坛帖子这让我尝试了这个。希望这对某人有帮助。