Ubuntu: Wired internet speed is slow in Ubuntu 12.04 [duplicate]


Possible Duplicate:
Internet very slow in Ubuntu

I have dual boot Windows 7 and Ubuntu 12.04 on my Dell N4110 laptop. I recently installed Ubuntu 12.04 on my existing windows 7 hard drive. I am experiencing very slow internet speed on Ubuntu(wired connection). But on Windows,internet is really fast. I disabled ipv6
by editing /etc/sysctl.conf No avail. Then i run the following command.

sudo ethtool -s eth0 speed 100 duplex full autoneg off  

No benefit.

I am having "Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 05)" network card.


If you are having slow internet speeds when downloading packages you can do this:

1)Open the software center

2)Go to Edit>Software Sources

3)Under "Ubuntu Software", click the dropdown list labeled "Download from".

4)Click "Other".

5)Now click "Select Best Server".

It will run tests and come up with the server that is right for your location. If it is an issue with slow browsing speeds not related to the Ubuntu servers make sure your browser is up to date.


Ubuntu 12.04 is slower than Windows 7 in network performance. Testing both, it's about 50% or less. With Dell Optiplex 780 and Intel 82567LM-3 adapter, the number of collisions in a 12 hour period 11479. Tried 1000/100 mbit with full and half duplex. No change. Going to try tcp windows size adjustments. Never had this issue when the same system had Windows 2008 server. Recently switched to 12.04 LTS on the same system and network performance slowed to a crawl. I cannot find an updated 82567LM-3 driver so I am currently stuck with this issue.


sudo apt-get install preload works pretty well.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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