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This has been asked tons of times, that's why I've tried out a couple of solutions and since none of the stuff worked, decided to ask for help here (as a last/desperate resort).

I own a Dell Inspiron 15R and have been using Ubuntu 14.04 for a couple of weeks. Fairly new to this world, but was determined to get away from Windows. So I'm running this baby with two partitions

  1. Ubuntu 14.04
  2. Windows 8.1

I've disabled ipv6, edited nsswitch and conf files

E.g. newly added in sysctl.conf

#disable ipv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

net.core.rmem_default = 524288
net.core.rmem_max = 524288
net.core.wmem_default = 524288
net.core.wmem_max = 524288
net.ipv4.tcp_wmem = 4096 87380 524288
net.ipv4.tcp_rmem = 4096 87380 524288
net.ipv4.tcp_mem = 524288 524288 524288
net.ipv4.tcp_rfc1337 = 1
net.ipv4.ip_no_pmtu_disc = 0
net.ipv4.tcp_sack = 1
net.ipv4.tcp_fack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_ecn = 0
net.ipv4.route.flush = 1

lspci -knn | grep Net -A2

02:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b1] (rev 73)
    Subsystem: Intel Corporation Wireless-N 7260 [8086:4462]
    Kernel driver in use: iwlwifi

Here's the speed test.

Please help me, I'm at the end of my tether. True story. :'(

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Monticora
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  • In hindsight, I should've made some notes on WHAT I've done so far, but have neglected to do so. Ugh. The points I listed in the post before, are the ones off the top of my head that I have a recollection of. – Monticora Sep 17 '15 at 17:58
  • How do you connect to internet? By wire? – Pilot6 Sep 17 '15 at 17:59
  • Please go to speedtest.net and paste your results – David Sep 17 '15 at 18:15
  • @Pilot: wireless, yep – Monticora Sep 17 '15 at 21:46
  • Please [edit] your question and add output of lspci -knn | grep Net -A2 terminal command. – Pilot6 Sep 17 '15 at 21:47
  • Hi @DavidCole, I've added the speed test! – Monticora Sep 18 '15 at 09:37
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    Look at this question. Your one is a duplicate. http://askubuntu.com/questions/660155/wifi-losing-connection-weak-signal-intel-7260-adapter – Pilot6 Sep 18 '15 at 09:53
  • Do you use bluetooth? Try other options from that answer too. – Pilot6 Sep 18 '15 at 11:42
  • @Pilot6 I ran this command sudo tee /etc/modprobe.d/iwlwifi-opt.conf <<< "options iwlwifi 11n_disable=1" and after rebooting, I noticed a slight improvement but not by much. See the speed test – Monticora Sep 18 '15 at 11:50
  • @Monticora You can use other options too. And answer please regarding bluetooth. – Pilot6 Sep 18 '15 at 11:53
  • I've done that... by which I mean: "enable all of the options and removing them one by one to test which one does the trick". It didn't really work/make a difference. To answer your question about bluetooth-- It's always switched on, even when I switch it off, somehow it switches itself back on. I don't know why this keeps happening, really weird, I gotta admit. You think bluetooth has smth to do with the slow internet? – Monticora Sep 18 '15 at 14:00

2 Answers2

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I tried it and worked fine for me. Try adding OpenDNS server to your IPv4 setting

208.67.222.222 and 208.67.220.220
Puneet Soni
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  • Thanks, I edited the connection, It's slightly improved. But I'm still looking for something I can do additionally. I'm used to a much faster wireless connection, it's really frustrating and upsetting. – Monticora Sep 20 '15 at 13:58
  • The internet speed seems to continually fluctuate. I just tested it again and it said ca. 2.5 Mbps. May I ask how fast yours is? – Monticora Sep 20 '15 at 16:14
  • I am getting 4.0 - 5.5 mbps fluctuating speed of 16 mpbs wireless broadband connection – Puneet Soni Sep 21 '15 at 03:32
  • My wireless connection is 54Mbps, but as mentioned it doesn't even scratch the surface in that regard, since I get 2.5Mbps – Monticora Sep 21 '15 at 08:19
  • http://ubuntuforums.org/showthread.php?t=1871477

    try this hope this will work for you

     – Puneet Soni Sep 21 '15 at 17:35
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Open your terminal and then type iwconfig If you are getting this output :-

ppp0 no wireless extensions.

eth0 no wireless extensions.

lo no wireless extensions.

wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=19 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:on

Then try disabling your power management on Wi-Fi. This will increase your continuity in speed but will consume your battery 2% to 3% faster.

To disable this

sudo gedit /etc/pm/power.d/wireless

Copy and paste below into the empty file and save it.

#!/bin/sh
/sbin/iwconfig wlan0 power off

Now you need to change the permission

sudo chmod 755 /etc/pm/power.d/wireless

Now restart your system. Hope this works for you.

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Puneet Soni
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