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I installed Ubuntu 14.04 LTS alongside Windows 7 about a month ago.

Since then my internet connectivity has been extremely slow. I am connected using WiFi and I have a Intel wireless 7260 network card. Webpages take forever to load. Other devices connected to the same network have no problem at all and my Windows installation does not either. I have been browsing the Ubuntu forums for a while now and have tried a lot of different things such as disabling ipv6 but to no avail.

Edit: As requested:

# /etc/modprobe.d/iwlwifi.conf    
# iwlwifi will dyamically load either iwldvm or iwlmvm depending on the
# microcode file installed on the system.  When removing iwlwifi, first
# remove the iwl?vm module and then iwlwifi.
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
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  • Can you add the result of cat /etc/modprobe.d/iwlwifi.conf to your question
    – Jeremy31
    Mar 5, 2015 at 15:05
  • Hey, updated the questions as you asked.
    – Sam
    Mar 5, 2015 at 23:00

1 Answer 1

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I would check the results of iwlist scan for your access point to look for TKIP as it will reduce download speed and try echo "options iwlwifi 11n_disable=8" | sudo tee -a /etc/modprobe.d/iwlwifi.conf and reboot

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1319630 is a bug report that says that performance dropped 85% without using the 11n_disable=8 parameter

EDIT: You may also see improvement by setting your country code with 

sudo iw reg set CA

And by editing the crda file gksudo gedit /etc/default/crda and change the line that is usually REGDOMAIN=00 to REGDOMAIN=CA then save and exit program, reboot

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  • Thanks for the reply! I ran the command and it doesn't seem to end. I read the thread for the bug report and someone mentioned that to make it permanent I had to add a new file? Internet seems to have gotten better after I ran it, but will only find out if I use it for a few more hours. How would I go about making it permanent if it did end up making a difference?
    – Sam
    Mar 5, 2015 at 23:33
  • 1
    It is permanent with the method I instructed you to use, but it can be removed if needed. The non-permanent method is sudo modprobe -r iwlwifi followed by sudo modprobe iwlwifi 11n_disable=8 as it will have no effect after a reboot or even after sudo modprobe -r iwlwifi followed by sudo modprobe iwlwifi If you want to look at the entire results of iwlist scan run it this way iwlist scan > iwlist.txt and you should be able to look at the entire file with gedit iwlist.txt
    – Jeremy31
    Mar 5, 2015 at 23:40
  • Alright thanks. Just fyi, I had to end the command with Ctrl + C as it would not end by itself. Is this normal?
    – Sam
    Mar 5, 2015 at 23:46
  • There must be a lot of wifi access points in your area if that is the case, the alternative is the wireless script from ubuntuforums ubuntuforums.org/showthread.php?t=370108 and you can paste the contents of wireless-info.txt at paste.ubuntu.com and post the URL it shows
    – Jeremy31
    Mar 6, 2015 at 0:03
  • Here is the info from the file after running the script. paste.ubuntu.com/10545472
    – Sam
    Mar 6, 2015 at 0:54

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