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Ubuntu Ethernet driver 導入メモ

Last updated at Posted at 2021-01-15

MSI Z490-A Pro、Ubuntu20.04が有線LANを認識しなかったので、
その時のDriver導入メモ。

1.カーネルバージョンチェック
  $ uname -r
5.8.0-38-generic

2.ネットワークチップチェック
  $ lspci | grep Ether
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller (rev 04)
Realtek RTL8125の2.5Gbeのドライバが必要。
3.ドライバの有無チェック
  $ ls /lib/modules/5.4.0-54-generic/kernel/drivers/net/ethernet/realtek/
8139cp.ko 8139too.ko atp.ko r8169.ko
  R8125がないので、導入が必要。
4.RTL8125ドライバ用ファイルのダウンロード
https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-pci-express-software
  Unix(Linux)の2.5G Ethernet LINUX driver r8125 for kernel up to 5.6をダウンロード
5.RTL8125.koの作成
 4.でダウンロードしたファイルを解凍
 $ sudo bash ./autorun.sh
で、3.のディレクトリに作成される。

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