0

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
  • Can you add the result of cat /etc/modprobe.d/iwlwifi.conf to your question – Jeremy31 Mar 5 '15 at 15:05
  • Hey, updated the questions as you asked. – Sagar Desai Mar 5 '15 at 23:00
1

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

  • 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? – Sagar Desai Mar 5 '15 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 '15 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? – Sagar Desai Mar 5 '15 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 '15 at 0:03
  • Here is the info from the file after running the script. paste.ubuntu.com/10545472 – Sagar Desai Mar 6 '15 at 0:54

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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