可见0bda：a811 Realtek WiFi适配器和（我相信已安装）设备驱动程序未连接
lsusb
Bus 001 Device 002: ID 8087:8000 Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 002: ID 18a5:0246 Verbatim, Ltd Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 004: ID 0a5c:216d Broadcom Corp. Bus 002 Device 005: ID 0cf3:7015 Atheros Communications, Inc. TP-Link TL-WN821N v3 / TL-WN822N v2 802.11n [Atheros AR7010+AR9287] Bus 002 Device 006: ID 0bda:a811 Realtek Semiconductor Corp. Bus 002 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
我遇到问题的设备是006
dkms status
8812au, 4.2.2, 4.13.0-39-generic, x86_64: installed bcmwl, 6.30.223.271+bdcom, 4.13.0-39-generic, x86_64: installed bcmwl, 6.30.223.271+bdcom, 4.4.0-122-generic, x86_64: installed
usb-devices
…
Bus=02 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 6 Spd=480 MxCh= 0 D: Ver= 2.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=0bda ProdID=a811 Rev=02.00 S: Manufacturer=Realtek S: Product=802.11ac WLAN Adapter S: SerialNumber=00e04c000001 C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=500mA I: If#= 0 Alt= 0 #EPs= 6 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
…
sudo lshw -class network
*-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:02:00.0 logical name: enp2s0 version: 0c serial: 00:71:c2:08:aa:48 size: 10Mbit/s capacity: 1Gbit/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 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168g-2_0.0.1 02/06/13 latency=0 link=no multicast=yes port=MII speed=10Mbit/s resources: irq:46 ioport:e000(size=256) memory:f7b00000-f7b00fff memory:f0a00000-f0a03fff *-network UNCLAIMED description: Network controller product: BCM43142 802.11b/g/n vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:04:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress cap_list configuration: latency=0 resources: memory:f7a00000-f7a07fff *-network description: Wireless interface physical id: 2 bus info: usb@2:4 logical name: wlxa0f3c11c58c4 serial: a0:f3:c1:1c:58:c4 capabilities: ethernet physical wireless configuration: broadcast=yes driver=ath9k_htc driverversion=4.13.0-39-generic firmware=1.4 ip=172.20.10.5 link=yes multicast=yes wireless=IEEE 802.11
如何使适配器使用驱动程序？
或者我完全错了？
我回答以后的参考，自己没有回答就找到了问题。 有几个问题：
- 我在正确识别芯片组时遇到了问题。 看来这个0bda：a811是realtek芯片组rtl8812au; 至少对我来说rtl8812au司机工作了。
- 该芯片组不适用于Ubuntu 18.04-1开箱即用。 甚至可以使用
apt-get安装的rtl8812au-dkms驱动程序也不起作用。sudo apt-get install rtl8812au-dkms似乎安装了4.3.8版（你可以用dkms status检查）。 - 幸运的是，新版本的驱动程序可以正常工作，但您需要手动安装它。 看到这个答案 。 我不完全理解它是不起作用的驱动程序还是模块加载程序的某些问题。
总结一下可以解决问题的命令：
git clone https://github.com/abperiasamy/rtl8812AU_8821AU_linux.git cd rtl8812AU_8821AU_linux sudo make -f Makefile.dkms install
在那之后，给dkms status你应该看到如下行：
rtl8812au, 4.3.14, 4.15.0-30-generic, x86_64: installed
重新启动它应该工作。