我买了一台笔记本电脑，华硕 Vivobook S310L，安装了 Kubuntu 19.04。它运行起来很顺畅，但我的 wifi 出现了问题。它根本无法连接到我的家庭无线网络...网络管理器尝试连接，但在获取地址时挂起，然后放弃并断开网络。但它可以连接到我用智能手机创建的热点（我尝试了 2 部不同的智能手机）。这台笔记本电脑配备了 Atheros AR9485 芯片组。它还显示信号弱的问题，我通过在 BIOS 中禁用蓝牙解决了这个问题。但它永远无法连接到我的 wifi。
最奇怪的是，在同样的条件下（同样的位置，同样的办公桌，同样的 Kubuntu 版本，网络管理器版本），我的台式机与 wifi 连接没有任何问题。唯一的区别是它有一个带 Realtek 芯片组的 USB 加密狗，在 Kubuntu 上绝对没有问题。
这里有一些信息：
lspci
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09)
00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 09)
00:04.0 Signal processing controller: Intel Corporation Haswell-ULT Thermal Subsystem (rev 09)
00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)
00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 1 (rev e4)
00:1c.2 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 3 (rev e4)
00:1c.3 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 4 (rev e4)
00:1c.4 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 5 (rev e4)
00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)
00:1f.6 Signal processing controller: Intel Corporation 8 Series Thermal (rev 04)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
03:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)
04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mars LE [Radeon HD 8530M / R5 M240]
iwconfig
wlp3s0 IEEE 802.11 ESSID:"D3ntin"
Mode:Managed Frequency:2.437 GHz Access Point: A4:50:46:7E:DB:C7
Bit Rate=14.4 Mb/s Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=39/70 Signal level=-71 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:12 Invalid misc:182 Missed beacon:0
enp2s0 no wireless extensions.
lo no wireless extensions.
rfkill list all
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
lshw -c net
description: Wireless interface
product: AR9485 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 01
serial: 24:0a:64:b2:14:e3
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=5.0.0-38-generic firmware=N/A ip=192.168.43.88 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:19 memory:f7d00000-f7d7ffff memory:f7d80000-f7d8ffff
这里输出
journalctl -u NetworkManager
我进行了全新启动，当 KDE 加载时，我尝试连接我的 wifi - 但显然失败了。
答案1
当我们发现连接困难且信号强度低时，我们怀疑一根或两根天线都松了。您能检查一下吗？
在许多情况下，笔记本电脑的底部都有一个小门，可以访问无线网卡。