Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

My ethernet connection is very slow (it was also with 11.04). It works fine with another PC with XP. Also, WIFI is OK in Ubuntu.

I've checked several help pages, but nothing seems to work:

The connection is slow for the Update Manager too, so the Firefox settings I changed obviously did nothing.

It is not the IPv6 (set to Ignore) either. The IPv4 method set to Automatic (DHCP) doesn't work at all. In manual method, with addresses and DNS copied from my other computer:




DNS servers:,

It establishes a connection but then it is really slow. Sometimes it works fine for brief periods of time, then stops again.

I also updated the BIOS.

... and also installed bind9.

I'm connected to a apartments building's connection, so I don't have access to the router, etc.

The ethernet controller is Atheros AR8152 v2.0 (rev c1). At the network information it says that the driver is "atl1c", which I also updated (or installed, I'm not sure now).

My wife is getting really pissed off and I don't know where else to look.

Any help would be appreciated.

share|improve this question
Can you add an output of your manual configuration? – Bruno Pereira Dec 8 '11 at 11:25
You can try a cross-cable direct connection set up with static IPs in the same subnet. Then fire-up a file transfer between the machines. If it is fast enough, it could be the router. – lgarzo Dec 8 '11 at 11:32
Thanks, Bruno, I added the settings of the configuration, but what do you mean by output? --- Igarzo, they are two netbooks, I don't think I can make those connections...? – E. Trece Dec 8 '11 at 13:35

I believe what Igarzo is trying to do is to help you eliminate different problem areas.

To use his method you would either have to buy or make a "Crossover" Cat5 cable or purchase one as you will be connecting two like devices (computer ethernet port to another computer ethernet port).

To use a normal Cat5 patch cable will not work as the wiring is done differently (don't use the same one you connect your computer to the ethernet/broadband port).

In addition you will need to configure both IP addresses manually for both connected machines to something like for the first machine and for the second which defaults to a subnet mask of if I remember right.

Keep in mind that if you are trying to send the files back and forth between a Linux machine and a Windows machine you may have to have Samba or the like installed on the Linux machine.

If the two machines transfer files at descent speeds, then you can rule out the machine(s) themselves as the blame. If the file transfer still resembles the speed of which you were getting having it hooked into the Internet then you may be looking at a driver, software or firewall issue.

If you have a firewall installed on your Linux machine you may want to check it's restrictions to be sure it's not bottle-necking your speed. Another area to check would to be sure that programs such as torrent downloaders are not running in the background sucking up bandwidth on either machine as one can impact the whole network when connected simultaneously.

If you don't wan't to do without the torrent manager, you can go inside most torrent managers settings and turn down the upload and download speeds to allow more bandwidth for other tasks (just remember not to set either to "0" as most torrent managers recognize this as unlimited bandwidth allocated.

Last but not least would be to make sure you are using the right or appropriate drivers for your network interface card or NIC.

Also this address has diagrams of what a crossover cable should look like at it's terminations. If you have a normal cable handy you can look closely at it's ends and see that the ends match in color order as opposed to a crossover cable.

Hope this information helps.

share|improve this answer
Thanks for clarifying my comment! I was indeed trying to separate router/network incompatibility issues. If a simple cross-connection fails then I suspect the adapter might be defective (although it could also be a software error). Another easy way to test is to run a different OS on the netbook (eg. Windows) and see if it works. – lgarzo Dec 8 '11 at 15:46
Must... not... complaint... about... text... formatting... (I'll fix it!) – Bruno Pereira Dec 8 '11 at 21:52
Because at some point the ethernet card was working and after some update it didn't, I guessed it had to do with the drivers. I tried a new distribution from scratch, Mint, because this issue with Ubuntu is driving me crazy. The funny thing is that from the Live USB session the ethernet connection was OK, but not when I installed in the HD (both with and without a network connection for updates). I don't understand how the Live version can work and the installed one (with no updates) can't. What can be the problem here? – E. Trece Dec 11 '11 at 14:44

In that case it could very well be a driver issue. Open your "Dash Home" in Ubuntu and type in "additional drivers". Click on the option and see if there is an option or up to date driver to install regarding your ethernet card.

share|improve this answer
It gives the message "No proprietary drivers are in use on this system". I've installed back the MeeGo distribution, which was the one shipped with this netbook by default and... same problem. Wifi OK, no Lan connection! – E. Trece Dec 13 '11 at 9:42

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.