我有一台笔记本电脑，在 wifi 连接方面表现怪异：启动时，它会检测到 Wifi 卡，但当我列出可用的连接网络时，它只显示一个空列表（以及令人耳目一新的图标）
直到我让系统进入睡眠状态，情况才有所改变。当我重新打开系统时，整个网络列表就会出现，我可以连接到它们，互联网也能完美运行。这不是硬件问题，因为当我在这台笔记本电脑上安装 Windows 时，这种情况并没有发生，而且我在让系统进入睡眠状态时也不会移动屏幕（我知道这可能与此有关，因为 wifi 天线通常位于屏幕上，它可能会打开/关闭与适配器的接触。
我查看了可能的解决方案，但我不知道该怎么做。我更新了驱动程序，但问题并没有解决。
以下是我用来获取信息的一些命令：
$ sudo rfkill list
8: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
9: phy4: Wireless LAN
Soft blocked: no
Hard blocked: no
[After sleep/awake there are no changes]
$ sudo lshw -class network
*-network
description: Wireless interface
physical id: 1
bus info: usb@1:4
logical name: wlan0
serial: 38:a2:8c:dd:90:fb
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rtl8xxxu driverversion=4.13.0-17-generic firmware=N/A link=no multicast=yes wireless=IEEE 802.11
[After sleep/awake nothing changes]
$ ifconfig -a
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 412 bytes 25856 (25.8 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 412 bytes 25856 (25.8 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 38:a2:8c:dd:90:fb 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
[After sleep/awake nothing changes]
$ ip link show
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
4: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT group default qlen 1000
link/ether 38:a2:8c:dd:90:fb brd ff:ff:ff:ff:ff:ff
[After sleep/awake nothing changes]
$ dmesg | grep 1-4
[ 3.832315] usb 1-4: new high-speed USB device number 3 using xhci_hcd
[ 3.972863] usb 1-4: New USB device found, idVendor=0bda, idProduct=b720
[ 3.972866] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3.972868] usb 1-4: Product: 802.11n WLAN Adapter
[ 3.972870] usb 1-4: Manufacturer: Realtek
[ 3.972871] usb 1-4: SerialNumber: 00e04c000001
[ 8.098010] usb 1-4: This Realtek USB WiFi dongle (0x0bda:0xb720) is untested!
[ 8.098014] usb 1-4: Please report results to [email protected]
[ 8.252101] usb 1-4: Vendor: Realtek
[ 8.252104] usb 1-4: Product: 802.11n WLAN Adapter
[ 8.252106] usb 1-4: rtl8723bu_parse_efuse: dumping efuse (0x200 bytes):
(large dump here)
[ 8.252226] usb 1-4: RTL8723BU rev E (SMIC) 1T1R, TX queues 3, WiFi=1, BT=1, GPS=0, HI PA=0
[ 8.252229] usb 1-4: RTL8723BU MAC: 38:a2:8c:dd:90:fb
[ 8.252231] usb 1-4: rtl8xxxu: Loading firmware rtlwifi/rtl8723bu_nic.bin
[ 8.254976] usb 1-4: Firmware revision 35.0 (signature 0x5301)
##### After sleep/awake #####
[ 509.983513] usb 1-4: disconnecting
[ 509.983519] usb 1-4: Device still attached, trying to reset
[ 510.105432] usb 1-4: reset high-speed USB device number 3 using xhci_hcd
[ 513.226029] usb 1-4: reset high-speed USB device number 3 using xhci_hcd
[ 513.367975] usb 1-4:1.0: rebind failed: -517
[ 513.368008] usb 1-4:1.2: rebind failed: -517
[ 515.051381] usb 1-4: This Realtek USB WiFi dongle (0x0bda:0xb720) is untested!
[ 515.051394] usb 1-4: Please report results to [email protected]
[ 515.112651] usb 1-4: Vendor: Realtek
[ 515.112656] usb 1-4: Product: 802.11n WLAN Adapter
[ 515.112659] usb 1-4: rtl8723bu_parse_efuse: dumping efuse (0x200 bytes):
(large dump here)
[ 515.112827] usb 1-4: RTL8723BU rev E (SMIC) 1T1R, TX queues 3, WiFi=1, BT=1, GPS=0, HI PA=0
[ 515.112831] usb 1-4: RTL8723BU MAC: 38:a2:8c:dd:90:fb
[ 515.112834] usb 1-4: rtl8xxxu: Loading firmware rtlwifi/rtl8723bu_nic.bin
[ 515.112863] usb 1-4: Firmware revision 35.0 (signature 0x5301)
[ 517.457437] usb 1-4: USB disconnect, device number 3
[ 517.563643] usb 1-4: rtl8xxxu_active_to_lps: RX poll timed out (0x05f8)
[ 517.581014] usb 1-4: rtl8723bu_active_to_emu: Disabling MAC timed out
[ 517.581019] usb 1-4: disconnecting
[ 522.113676] usb 1-4: new high-speed USB device number 5 using xhci_hcd
[ 522.258117] usb 1-4: New USB device found, idVendor=0bda, idProduct=b720
[ 522.258122] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 522.258124] usb 1-4: Product: 802.11n WLAN Adapter
[ 522.258126] usb 1-4: Manufacturer: Realtek
[ 522.258128] usb 1-4: SerialNumber: 00e04c000001
[ 522.266921] usb 1-4: This Realtek USB WiFi dongle (0x0bda:0xb720) is untested!
[ 522.266925] usb 1-4: Please report results to [email protected]
[ 522.330063] usb 1-4: Vendor: Realtek
[ 522.330066] usb 1-4: Product: 802.11n WLAN Adapter
[ 522.330069] usb 1-4: rtl8723bu_parse_efuse: dumping efuse (0x200 bytes):
(large dump here)
[ 522.330177] usb 1-4: RTL8723BU rev E (SMIC) 1T1R, TX queues 3, WiFi=1, BT=1, GPS=0, HI PA=0
[ 522.330180] usb 1-4: RTL8723BU MAC: 38:a2:8c:dd:90:fb
[ 522.330182] usb 1-4: rtl8xxxu: Loading firmware rtlwifi/rtl8723bu_nic.bin
[ 522.330205] usb 1-4: Firmware revision 35.0 (signature 0x5301)
[ 525.618001] usb 1-4: rtl8xxxu_bss_info_changed: HT supported
$ dmesg | grep rtl
[ 7.899970] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[ 7.899976] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_config.bin
[ 7.910765] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_config.bin failed with error -2
[ 7.910771] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin
[ 8.252106] usb 1-4: rtl8723bu_parse_efuse: dumping efuse (0x200 bytes):
[ 8.252231] usb 1-4: rtl8xxxu: Loading firmware rtlwifi/rtl8723bu_nic.bin
[ 9.230698] usbcore: registered new interface driver rtl8xxxu
##### After sleep/awake #####
[ 515.068531] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[ 515.068535] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_config.bin
[ 515.068560] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_config.bin failed with error -2
[ 515.068563] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin
[ 515.112659] usb 1-4: rtl8723bu_parse_efuse: dumping efuse (0x200 bytes):
[ 515.112834] usb 1-4: rtl8xxxu: Loading firmware rtlwifi/rtl8723bu_nic.bin
[ 517.563643] usb 1-4: rtl8xxxu_active_to_lps: RX poll timed out (0x05f8)
[ 517.581014] usb 1-4: rtl8723bu_active_to_emu: Disabling MAC timed out
[ 522.278986] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[ 522.278991] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_config.bin
[ 522.279023] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_config.bin failed with error -2
[ 522.279026] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin
[ 522.330069] usb 1-4: rtl8723bu_parse_efuse: dumping efuse (0x200 bytes):
[ 522.330182] usb 1-4: rtl8xxxu: Loading firmware rtlwifi/rtl8723bu_nic.bin
[ 525.618001] usb 1-4: rtl8xxxu_bss_info_changed: HT supported
因此，日志dmesg是我能找到差异的唯一地方......但我仍然不确定发生了什么。
有人能帮我解决这个问题吗，这样我就不必进入睡眠状态，只需在启动后立即唤醒我的笔记本电脑？
注意：虽然dmesg显示此适配器为 USB 加密狗，但实际上并非如此。它集成在笔记本电脑内部。
编辑1
$ lsmod | grep rtl
rtl8xxxu 126976 0
mac80211 778240 1 rtl8xxxu
btrtl 16384 1 btusb
bluetooth 540672 33 btrtl,hci_uart,btintel,btqca,bnep,btbcm,rfcomm,btusb
[After sleep/awake there are no changes]
$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 5986:069e Acer, Inc
Bus 001 Device 003: ID 0bda:b720 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 046d:c52f Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[After sleep/awake]
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 5986:069e Acer, Inc
Bus 001 Device 005: ID 0bda:b720 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 046d:c52f Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
编辑2
$ cat /etc/NetworkManager/NetworkManager.conf
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=false
[device]
wifi.scan-rand-mac-address=no
答案1
尽管 dmesg 显示此适配器是 USB 加密狗，但事实并非如此。它集成在笔记本电脑内部。
我怀疑它连接到主板上的内部 USB 总线。这有点不寻常，但以前也见过。
您可能需要更改网络管理器：
sudo nano /etc/NetworkManager/NetworkManager.conf
添加新的部分如下：
[device]
wifi.scan-rand-mac-address=no
仔细校对，保存并关闭文本编辑器。
完成这些更改后，重新启动并让我们听到结果。