我很快就需要开始使用 Ubuntu 系统上的 WiFi，但我的板载 WiFi 非常慢而且很差。但是，Ubuntu 不允许我使用 WiFi 卡。我不太清楚该怎么办，我尝试过查找问题并安装驱动程序等，但没有成功。我输入了命令，它rfkill显示的内容如下：
$ rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: phy1: Wireless LAN
Soft blocked: no
Hard blocked: no
当我这样做时sudo lshw -C network，也显示出以下内容：
$ sudo lshw -C network
*-network
description: Ethernet interface /// this is the one i need working
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: enp3s0
version: 06
serial: 74:d4:35:9e:28:9c
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.041.00-NAPI duplex=full latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:28 ioport:ce00(size=256) memory:fddff000-fddfffff memory:fddf8000-fddfbfff
*-network
description: Wireless interface
product: AR9227 Wireless Network Adapter
vendor: Qualcomm Atheros /// this is my on-board ,so i cant use it.
physical id: 6
bus info: pci@0000:04:06.0
logical name: wlp4s6
version: 01
serial: e8:94:f6:57:42:e3
width: 32 bits
clock: 66MHz
capabilities: pm bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=4.4.0-98-generic firmware=N/A ip=10.0.0.49 latency=168 link=yes multicast=yes wireless=IEEE 802.11bgn
resources: irq:20 memory:fdcf0000-fdcfffff
*-network:0
description: Ethernet interface
physical id: 1
logical name: ham0
serial: 7a:79:19:10:87:c8
size: 10Mbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=tun driverversion=1.6 duplex=full ip=25.16.135.200 link=yes multicast=yes port=twisted pair speed=10Mbit/s
*-network:1
description: Wireless interface
physical id: 2
bus info: usb@2:1
logical name: wlxdc85de4a57c1
serial: dc:85:de:4a:57:c1
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rt2800usb driverversion=4.4.0-98-generic firmware=0.29 link=no multicast=yes wireless=IEEE 802.11bgn
我正在运行 Ubuntu 16.04，之前没有尝试使用 WiFi 卡，但我知道卡本身可以在我的 Windows 系统上运行。我现在有点不知道出了什么问题，所以如果有人能帮助我，我将非常感激。