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Just upgraded to 11.10 from 11.04 . My internet speed is VERY slow now. I did a speed test with two similar laptops. The one running windows has a download speed of 14Mb/s while the one running Ubuntu does not exceed .09 Mb/s (on the same network).

I never had an issue with 11.04.... Help

Knowledge Cube
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Hassan Gawad
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5 Answers5

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Look under connection information for the connection you use to access the net. If the driver is r8169 and you have a Realtek RTL8111 network chip on your motherboard then follow this post to get the correct driver installed. Ubuntu 11.10 uses kernel version 3.x so take the necessary steps noted for this kernel version (I didn't modify the makefile, just copied the files as instructed instead).

To find out what network chip you have try running lspci to list devices on your PCI bus. The culprit was

05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)

Before doing this my internet connection was inconsistent, slow and would drop a lot of packets (as shown by running ifconfig). Now its running fast with no dropped packets.

Point taken about my post being "forum like" in the comment, I have amended this answer to reflect that.

Mark Jones
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I found the solution here.

"The Realtek r8168B network card does not work out of the box in Redhat, Centos, Fedora, or Ubuntu: instead of loading the r8168 driver, modprobe loads the r8169 driver, which is broken as can be seen with ifconfig which shows large amounts of dropped packets."

Jabba
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I had the same problem, and it seems that

when you're on batterie Ubuntu reduces the power given to the WiFi radio to save it

as said here by @Bilal Akhtar

Community
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Abderrahmane TAHRI JOUTI
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Maybe is a DNS problem:

I'll show you how to use Google Public DNS.

1) Alt+F2 and paste gksu gedit /etc/resolv.conf

2) Copy and paste the following lines:

nameserver 8.8.8.8
nameserver 8.8.4.4

3) Restart your computer and that's all.

You also may try Open DNS if Google DNS doesn't work

nameserver 208.67.222.222 
nameserver 208.67.220.220
414v32
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I have this problem with 64bit 11.10 and I have an NVidia ethernet. It seems to be global to 11.10. I also noted that when I type 'ifconfig' it shows an ip6 address when I configured my network without one. Somehow the ip6 may be part of the problem.

The other problem I found is the default gateway. If the ip address is not in /etc/hosts (with a name) then this will slow things down considerably as well.

All I added to /etc/hosts is

192.168.1.1 router # default network router

Removing the IP6 support in FireFox does help a lot as well.

Hope someone comes up with a fix. Hopefully it will include scrapping Unity. ;)

Harry Skelton
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