刚刚安装了 Ubuntu 18.04，但我的 WiFi 适配器 Qualcomm Atheros QCA9565 / AR9565 无线网络适配器不工作，甚至没有出现在系统设置中。
lspci -knn | grep Net -A3 的输出：
> rahul@rahul-Inspiron-3542:~$ lspci -knn | grep Net -A3
06:00.0 Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter [168c:0036] (rev 01)
Subsystem: Dell QCA9565 / AR9565 Wireless Network Adapter [1028:020c]
Kernel driver in use: ath9k
Kernel modules: ath9k
07:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 07)
lspci -knn | grep Net -A2 的输出
rahul@rahul-Inspiron-3542:~$ lspci -knn | grep Net -A2
06:00.0 Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter [168c:0036] (rev 01)
Subsystem: Dell QCA9565 / AR9565 Wireless Network Adapter [1028:020c]
Kernel driver in use: ath9k
Kernel modules: ath9k
sudo rfkill 列表的输出
rahul@rahul-Inspiron-3542:~$ sudo rfkill list
[sudo] password for rahul:
0: dell-rbtn: Wireless LAN
Soft blocked: yes
Hard blocked: yes
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no
sudo lshw -C 网络的输出
rahul@rahul-Inspiron-3542:~$ sudo lshw -C network
*-network DISABLED
description: Wireless interface
product: QCA9565 / AR9565 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:06:00.0
logical name: wlp6s0
version: 01
serial: 4c:bb:58:30:aa:07
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=4.17.11-041711-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:18 memory:f7900000-f797ffff memory:f7980000-f798ffff
*-network
description: Ethernet interface
product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:07:00.0
logical name: enp7s0
version: 07
serial: 74:e6:e2:14:2a:c8
size: 10Mbit/s
capacity: 100Mbit/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 autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:19 ioport:e000(size=256) memory:f7800000-f7800fff memory:f2100000-f2103fff
*-network
description: Ethernet interface
physical id: 2
logical name: enp0s20u1
serial: 7a:14:5b:44:b4:96
capabilities: ethernet physical
configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip=192.168.42.109 link=yes multicast=yes
dmesg 的输出 | grep ath9k
rahul@rahul-Inspiron-3542:~$ dmesg | grep ath9k
[ 23.712505] ath9k 0000:06:00.0 wlp6s0: renamed from wlan0
sudo iw dev 的输出
rahul@rahul-Inspiron-3542:~$ sudo iw dev
[sudo] password for rahul:
phy#0
Interface wlp6s0
ifindex 3
wdev 0x1
addr 4c:bb:58:30:aa:07
type managed
txpower 0.00 dBm
dmesg 的输出 dmesg 的输出
我已经尝试了很多解决方案，但对我都不起作用，我花了好几天才找到答案。请有人解决我的问题。如果有人想要任何其他信息，请告诉我。
任何帮助将不胜感激。
答案1
伙计们，我连续尝试了一个月才找到“未找到 WiFi 适配器”问题的解决方案，所有版本的 Ubuntu 中的问题都是一样的，因为我尝试了 Ubuntu 16.04 然后是 Ubuntu 14.04，但我最终找到了解决方案。我几乎尝试了所有可用的解决方案。
在我的例子中，rfkill 列表的输出
0: dell-rbtn: Wireless LAN
Soft blocked: yes
Hard blocked: yes
因此，为了解决问题，我需要将 dell-rbtn 列入黑名单（这是硬件问题）
将 dell-rbtn 列入黑名单，我做到了
echo "blacklist dell-rbtn" | sudo tee /etc/modprobe.d/dell-rbtn.conf
之后重新启动笔记本电脑，现在我可以使用 WIFI 了。
我希望这能对某些人有所帮助，因为我也尝试了几个月来解决这个问题。谢谢
最后一件事是我的笔记本电脑配置 Dell Inspiron 3542 和网络控制器 [0280]: Qualcomm Atheros QCA9565 / AR9565 无线网络适配器