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My problem was really similar except I have an AMD and Asus motherboard build, but everything else was the same, or very similar, including my test results. I would have never have guessed that discharging your capacitors would fix intermittent connectivity issues with ethernet but I will also not look a gift horse in the mouth, lol. It worked! No more intermittent connectivity issues! I turned off my PC and unplugged it for a few minutes then pressed the power button for a few seconds, still unplugged, and let it sit for a few more minutes and then plugged it in and powered it back on. I had a very similar problem to yours and found the answer here:
![testing intermittent internet connection testing intermittent internet connection](https://pixfeeds.com/images/14/391339/640-104111595-plug-in-router.jpg)
I'll broaden my search through intermittent network connectivity problems. Running ifdown eth0 and then ifup eth0 brings it back temporarily if I just wait it comes back after a couple of minutes. It seems my problem is a little more generic than I described now when I try pinging my router and google simultaneously, they both go unreachable at the same time. The only clue I can see is that ifconfig is reporting a lot of dropped packets, but I'm not sure what to do about it. I managed to bring the OS fully up to date, according to the update manager, but it didn't fix the issue, and with my limited understanding of network architecture I'm at my wit's end. The network hardware is built into the motherboard: Gigabyte Z68XP-UD3P. Also, I don't think it's a hardware issue, as I never have any internet connectivity problems on the same machine in Windows.
![testing intermittent internet connection testing intermittent internet connection](https://i.ytimg.com/vi/tLKGBNh1qRo/maxresdefault.jpg)
It's not a DNS issue because pinging known IP addresses directly shows the same behavior. I get the same issue when I use automatic DHCP address settings, although I did confirm that there is no other machine on the network with the static IP address I want to use.Īs I said, the connection to the local network stays solid - I never have any trouble pinging 192.168.1.* - it's internet addresses that I intermittently cannot reach. TX packets:13117 errors:0 dropped:211 overruns:0 carrier:0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Ifconfig confirms that these settings are working: eth0 Link encap:Ethernet HWaddr 50:e5:49:40:da:a6 broadcast 192.168.1.255 (also confirmed with the router).netmask 255.255.255.0 (confirmed as the right netmask for the router).Whether I configure my network via the network manager or via /etc/network/interfaces seems to make no difference.
![testing intermittent internet connection testing intermittent internet connection](https://bingo-w.github.io/images/profile.jpg)
This happens consistently, dropping the connection for about 30 seconds out of every minute or two. When I continuously ping 74.125.227.18 (a server), I get responses for a while, then I start getting "Destination Host Unreachable" for a while, then I get responses again. In Ubuntu, although I maintain a solid connection to my LAN (pinging the router IP address consistently returns a good result), my internet connectivity drops in and out. See my answer below for the solution (drivers). With a working Internet connection in Windows, I ignored the problem for some months. I posted the original question months ago, and misinterpreted what was going on. I see "eth0 link up" messages appear periodically, corresponding with the return of connectivity. When I tail the log: tail -f /var/log/kern.log In Ubuntu, however, my network interface periodically dies and resets itself I'll have a solid connection for 30 seconds, and then it will go out for 30 seconds. In Windows, using the same hardware, my LAN connectivity is solid. I recently built a new computer and set it up to dual-boot Windows 7 and Ubuntu 11.10.