Wifi

1. 查詢開機資訊 iwlwifi-9000-pu-b0-jf-b0-xx.ucode firmare 不存在。

   [root@dywmsi ~]# dmesg | grep wifi
   iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
   iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-36.ucode failed with error -2
   iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-35.ucode failed with error -2
   iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-34.ucode failed with error -2
   iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-33.ucode failed with error -2
   iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-32.ucode failed with error -2
   iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-31.ucode failed with error -2
   iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-9000-pu-b0-jf-b0-30.ucode failed with error -2
   iwlwifi 0000:00:14.3: no suitable firmware found!
   iwlwifi 0000:00:14.3: minimum version required: iwlwifi-9000-pu-b0-jf-b0-30
   iwlwifi 0000:00:14.3: maximum version supported: iwlwifi-9000-pu-b0-jf-b0-36
   iwlwifi 0000:00:14.3: check git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
   

2. 下載 Intel® Wireless-AC 9560 fimware，網頁上說明此 firmware 必須使用 4.14 以上版本 kernel。

   [root@dywmsi ~]# wget https://wireless.wiki.kernel.org/_media/en/users/drivers/\
   iwlwifi-9000-pu-b0-jf-b0-34.618819.0.tgz
   

3. 解打包壓縮。

   [root@dywmsi ~]# tar zxvf iwlwifi-9000-pu-b0-jf-b0-34.618819.0.tgz 
   iwlwifi-9000-pu-b0-jf-b0-34.618819.0/
   iwlwifi-9000-pu-b0-jf-b0-34.618819.0/iwlwifi-9000-pu-b0-jf-b0-34.ucode
   iwlwifi-9000-pu-b0-jf-b0-34.618819.0/LICENSE.iwlwifi-9000.ucode
   iwlwifi-9000-pu-b0-jf-b0-34.618819.0/README.iwlwifi-9000.ucode
   

4. 將 firmware 複製到 /lib/firmware。

   [root@dywmsi ~]# cp iwlwifi-9000-pu-b0-jf-b0-34.618819.0/\
   iwlwifi-9000-pu-b0-jf-b0-34.ucode /lib/firmware/
   

5. 重開機後再查詢開機 wifi 訊息。

   [root@dywmsi ~]# dmesg | grep wifi
   iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
   iwlwifi 0000:00:14.3: loaded firmware version 34.0.0 op_mode iwlmvm
   iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9560, REV=0x318
   iwlwifi 0000:00:14.3: base HW address: 04:ea:56:e1:e3:67
   iwlwifi 0000:00:14.3 wlan0: disabling HT/VHT due to WEP/TKIP use