Intermittent internet drops out on Ubuntu 11.04. In this case, the network (WiFi) is fine

Question

Computer networks

The situation is this:
There is a laptop with an Ethernet controller: Marvell Technology Group Ltd. Yukon Optima 88E8059 [PCIe Gigabit Ethernet Controller with AVB] (rev 11) , D-Link DIR-320 router . On an Ubuntu 11.04 laptop. The WiFi connection is stable, but the Internet disappears at an enviable frequency. That is, it simply does not exist either, and nm-applet shows that everything is in order with the network. After reconnecting to the network, the Internet reappears for a while, etc.

What could be the problem and how to deal with it?

Tried, did not help:
Create /etc/modprobe.d/ath9k.conf and write there:
options ath9k nohwcrypt=1
options ath5k nohwcrypt=1

Set backports: linux-backports-modules-net-natty-generic

Update the kernel:
sudo add-apt-repository ppa:kernel-ppa/ppa
sudo apt-get update
sudo apt-get install linux-headers-2.6.39-0 linux-headers-2.6.39-0-generic linux-image- 2.6.39-0-generic --fix-missing

Answer 1

I also have DIR, but 615, had a similar problem, I decided in one of the many firmware updates.
Try updating, it might help you.

Answer 2

Recently there was a question with the same problem, disabling dhcp and setting the IP address with static helped.

Answer 3

1. What's in the logs?

Answer 4

I have an hp probook laptop with ubuntu 14.04. Wi-Fi keeps dropping too, I'm waiting for a solution