警告-Ubuntu提示W: Possible missing firmware xxx解决方法

现象

当执行 sudo apt-get update或者sudo apt-get dist-upgrade时，有如下警告：

W: Possible missing firmware /lib/firmware/rtl_nic/rtl8125a-3.fw for module r8169
W: Possible missing firmware /lib/firmware/rtl_nic/rtl8168fp-3.fw for module r8169
W: Possible missing firmware /lib/firmware/i915/tgl_dmc_ver2_04.bin for module i915
W: Possible missing firmware /lib/firmware/i915/skl_guc_33.0.0.bin for module i915
W: Possible missing firmware /lib/firmware/i915/bxt_guc_33.0.0.bin for module i915
W: Possible missing firmware /lib/firmware/i915/kbl_guc_33.0.0.bin for module i915
W: Possible missing firmware /lib/firmware/i915/glk_guc_33.0.0.bin for module i915
W: Possible missing firmware /lib/firmware/i915/kbl_guc_33.0.0.bin for module i915
W: Possible missing firmware /lib/firmware/i915/icl_guc_33.0.0.bin for module i915

原因

缺少固件文件导致的。

解决方法

1 在网站搜索固件
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/rtl_nic/
或者
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/i915/
2 进入本机相对应目录

cd /lib/firmware/rtl_nic/

或者

cd /lib/firmware/i915/

3 在对应目录下载对应插件，例如

sudo wget https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/rtl_nic/rtl8125a-3.fw
sudo wget https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/rtl_nic/rtl8168fp-3.fw

4 重新生成当前系统的initramfs文件

sudo update-initramfs -u