Ubuntu 18.04.3 LTS 上 HP ProBook 4330s 上的 Qualcomm Atheros AR9285 无线网络适配器出现问题

Question

• 硬件是 HP ProBook 4330s
• 软件是Ubuntu 18.04.3 LTS

几天前，WiFi适配器突然停止工作。

设置用户界面显示“未找到 Wi-Fi 适配器”

有些 CLI 说

chuck@jones:~$ lspci -knn | grep Net -A3; rfkill list
24:00.0 Network controller [0280]: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
      Subsystem: Hewlett-Packard Company AR9285 Wireless Network Adapter (PCI-Express) [103c:1461]
      Kernel driver in use: ath9k
      Kernel modules: ath9k
25:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 06)
0: phy0: Wireless LAN
      Soft blocked: no
      Hard blocked: yes
1: hp-wifi: Wireless LAN
      Soft blocked: no
      Hard blocked: yes
2: hp-bluetooth: Bluetooth
      Soft blocked: no
      Hard blocked: yes
3: hci0: Bluetooth
      Soft blocked: no
      Hard blocked: no

chuck@jones:~$ sudo lshw -C network
[sudo] password for chuck: 
  *-network DISABLED        
       description: Wireless interface
       product: AR9285 Wireless Network Adapter (PCI-Express)
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:24:00.0
       logical name: wlo1
       version: 01
       serial: 74:e5:43:bc:ff:06
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=ath9k driverversion=4.15.0-64-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
       resources: irq:19 memory:d4700000-d470ffff

chuck@jones:~$ uname -a
Linux jones 4.15.0-64-generic #73-Ubuntu SMP Thu Sep 12 13:16:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

chuck@jones:~$ iwconfig
wlo1      IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=off   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

这可能与最新的 Ubuntu 软件更新有关吗？或者可能是旧硬件崩溃？如何解决此类问题？

Answer 1

您的适配器被 阻止rfkill。HP 笔记本电脑上会发生这种情况。以下是修复此问题的步骤：

1. 确保您的笔记本电脑上没有硬件无线开关，如果存在，请将其打开。

2. 检查 BIOS 中的无线选项并启用它。如果没有无线选项，请尝试将 BIOS 重置为默认值。

3. 如果没有任何帮助，请在终端中运行以下命令将 HP 平台驱动程序列入黑名单：

   sudo tee /etc/modprobe.d/blacklist-hp.conf <<< "blacklist hp_wmi"
   

然后重新启动。