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Ubuntu 11.04 Network speed fix for Z68 boards

post #1 of 5
Thread Starter 
Was having issues found this solution. Works perfectly now back to top speeds. I take no credit for this as it is not mine, but it is extremely helpful for those with z68 chipsets that are running linux. Seems the problem is dropped packets. Run ifconfig through terminal and see if you have dropped packets.

Quote:
RX packets:98254 errors:0 dropped:98254 overruns:0 frame:98254
TX packets:72648 errors:0 dropped:113 overruns:0 carrier:0

http://www.foxhop.net/realtek-droppi...ntu-and-fedora

Quote:
Realtek NIC driver r8169 dropping packets on linux ubuntu and fedora

Many motherboards nowadays have integrated gigabit ethernet that use the Realtek NIC chipset.
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.
One solution found by Barry Mavin is to remove the r8169 driver and install the latest r8168 driver.
Steps to install Realtek r8168 driver

  • Download the R8168B linux driver:
    wget http://www.foxhop.net/attachment/r8168-8.023.00.tar.bz2 tar vjxf r8168-8.023.00.tar.bz2
  • Check whether the built-in driver, r8169.ko (or r8169.o for kernel 2.4.x), is installed:
    lsmod | grep r8169
  • r8169 seems installed if the lsmod command returns output, so remove r8169 with:
    sudo rmmod r8169
  • install the Realtec r8168b nic driver:
    cd r8168-8.023.00 sudo ./autorun.sh
  • prevent the r8169 driver from loading again:
    echo "blacklist r8169" >> /etc/modprobe.d/blacklist.conf
  • you may now verify that r8168b has been installed and loaded by running:
    lsmod | grep r8168
The dropped packets problem should appear fixed! w00t!

Again i take no credit for this.
Edited by Gnomepatrol - 8/9/11 at 1:48pm
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post #2 of 5
that sounds like isp speeds...

you sure those are internal network speeds? do you have two computers you can transfer between to test transfer speeds without touching a wan?

if it IS isp speeds, there isnt anything you can do and its not linux's fault probably just a poor coincidence
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post #3 of 5
Thread Starter 
I stated that in windows i an getting 15-18mbs down and 2-3mbs up. Its Linux not my isp.

Sent from my SCH-I510 using Tapatalk
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post #4 of 5
Thread Starter 
Found a fix updated op. This is apparently a problem with z68 chipsets and their network driver. Instructions on a fix is in the op. Hope this helps someone save time finding a solution.
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post #5 of 5
Quote:
Originally Posted by Gnomepatrol View Post
I stated that in windows i an getting 15-18mbs down and 2-3mbs up. Its Linux not my isp.

Sent from my SCH-I510 using Tapatalk
well hard wired network to get speeds of 15-18 or in the kilobyte range... just struck me as odd and if you were judging all that speed by uploading/downloading from a website, it would have been an isp limitation not your internal network or windows network stack vs linux network stack
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