after I install the driver of igb-188.8.131.52.tar.gz, the light of the
Network Connections are all off. and I can't
find the eth0 by ifconfig.
Thank you for contacting Intel.
Can you try the older driver version 20.6? This version contains igb-184.108.40.206.tar.gz. Because, I am suspecting that it could be incompatibility issue. In case you still the same error, we suggest to contact your system manufacturer to request for a validated driver.
You may download the driver here - Drivers & Software.
Hope this help resolve your network connection issue.