Dell WIfi Not working, after 15.04 install

Question

I have clean formatted my dell 5010 and install only Ubuntu. After installing everything is working fine expect wireless internet.

After running, lspci -nn | grep 0280 I am getting

12:00.0 Network controller [0280]: Intel corporation centrino wireless -N 1000 [Condor Peak] [ 8086:0083]

Please edit your question to add the result of this terminal command: lspci -nn | grep 0280. Welcome to askubuntu. — chili555, Sep 04 '15 at 20:33

chili555 · Answer 1 · 2015-09-05T00:39:15.323

1

The driver for your Intel wireless is installed by default in 15.04 but is sometimes a bit tricky.

First, check the settings in the router. WPA2-AES is preferred; not any WPA and WPA2 mixed mode and certainly not TKIP. Second, if your router is capable of N speeds, you may have better connectivity with a channel width of 20 MHz in the 2.4 GHz band instead of automatic 20/40 MHz, although it is likely to affect N speeds. I also have better luck with a fixed channel, either 1, 6 or 11, rather than automatic channel selection. Also, be certain the router is not set to use N speeds only; auto B, G and N is preferred. After making these changes, reboot the router.

Next, I recommend that your regulatory domain be set explicitly. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it permanently:

gksudo gedit /etc/default/crda

Use nano or kate or leafpad if you don't have the text editor gedit.

Change the last line to read:

REGDOMAIN=IS

Of course, substitute your country code if not Iceland. Proofread carefully, save and close the text editor.

Next, I'd set IPv6 to Ignore in Network Manager: http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/images/netconfig/network-connections-ipv6-ignore.png This example is for ethernet, but you want wireless.

If these changes do not help, please try:

gksudo gedit  /etc/modprobe.d/iwlwifi.conf

Change the '11n_disable=8' to '11n_disable=1'. Reboot and tell us if connectivity has improved. Proofread carefully, save and close the text editor.

Reboot and tell us if the connectivity improved.

edited Sep 05 '15 at 00:39

answered Sep 04 '15 at 20:51

chili555

60,188

I executed given commands but still no luck, the internet is still working very slow. – Navneet Singh Sep 04 '15 at 21:39
Please provide the information as outlined here: http://askubuntu.com/questions/425155/my-wireless-wifi-connection-does-not-work-what-information-is-needed-to-diagnos/425180#425180 As the result will be lengthy, post the result here and give us the link: http://paste.ubuntu.com – chili555 Sep 04 '15 at 21:49
@chili555 What if "11n_disable=1"? – Pilot6 Sep 04 '15 at 22:18
check the wireless info here link – Navneet Singh Sep 04 '15 at 23:09
@chili555 please check the output [http://paste.ubuntu.com/12277500/] (http://paste.ubuntu.com/12277500/) – Navneet Singh Sep 04 '15 at 23:36
Please see my edit above in a few moments. – chili555 Sep 05 '15 at 00:36
Did you check the solution? – Navneet Singh Sep 05 '15 at 08:52
Did you try the revision to options iwlwifi 11n_disable=1? Is the result the same? is the SSID of "1947" yours? Are you able to change to WPA2 only, not mixed mode? – chili555 Sep 05 '15 at 11:10
Hit-and-run question! :-( – Fabby Sep 08 '15 at 20:45

score 0 · Answer 2 · answered Sep 04 '15 at 22:21

0

Run in terminal

sudo tee /etc/modprobe.d/iwlwifi-opt.conf <<< "options iwlwifi 11n_disable=1 swcrypto=1 power_save=0 bt_coex_active=0"

and reboot.

answered Sep 04 '15 at 22:21

Pilot6

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Dell WIfi Not working, after 15.04 install

2 Answers2