0

There is something wrong with my Ubuntu 14.04 Laptop's eth0. It works fine after booting up. However, if I don't use it for a short period of time (few minutes), then it will not work. When this happens, connecting to Internet and pinging 192.168.1.1 (my ADSL router's IP address) will fail. To solve this issue, I need to disconnect and reconnect Ethernet1 (i.e., eth0) in Ubuntu desktop environment.

That eth0 connects to a port of that ADSL router which another Windows PC also connects to (the other port of it). The network of that Windows PC always works fine.

Could anybody comment on this strange issue?

Oliver Chen
  • 1

2 Answers2

0

Lacking data, I must guess that you are getting your IP Address via DHCP from the ADSL router. Check for a short "lease time". If this is the case, fix it on the ADSL router. Use the command: 

zgrep dhclient /var/log/syslog*

to investigate.

waltinator
  • 37,856
0

After posting this problem I encounter the same symptom on that Windows PC. Fortunately, after debugging this weird problem for weeks, now the root cause seems to be clear: there is something wrong with the firmware in that DSL modem. By upgrading that FW to the latest version, everything has gone smoothly for two days. Anyway, many thanks to waltinator's kind help!

Oliver Chen
  • 1