Very slow connection on an Intel(R) WiFi Link 5100 AGN

Question

So my wi-fi card is a Intel 5100 AGN and so far doesnt works. if anyone managed to make it work give me any hint. Ubuntu user :) tried disabling ipv6 - no result

Solution 1

There is a problem with kernel 3.0.0.x and Intel wifi under 802.11n.

We are all waiting for the fix in the kernel.

There is a workaround:

1. Create a file /etc/modprobe.d/intel_11n_disable.conf containing :

   options iwlagn 11n_disable=1
   

2. sudo update-initramfs -u

3. reboot or sudo modprobe -r iwlagn && sudo modprobe iwlagn

Ref:

• https://bugs.launchpad.net/ubuntu/+source/linux/+bug/871254

Solution 2

Note that for 12.04 and later, you need to replace all references of iwlagn with iwlwifi (at least, according to what I've read). That's what worked for me with my Intel Pro Wireless 5100 on 13.04.

1. Create a file /etc/modprobe.d/intel_11n_disable.conf containing:

   options iwlwifi 11n_disable=1
   

2. sudo update-initramfs -u
3. reboot

(other answers say to run modprobe, but it always said my wifi was in use, even when disabled, so reboot was required for me)

Comments

[zippy]

helloooo?! @Jorge Castro, re-edit a bit the title of question :)

[RealityPC]

Maybe related: askubuntu.com/questions/79721/…

[Fitoria]

This worked for me! Thanks! Asus u52f with 02:00.0 Network controller: Intel Corporation Centrino Advanced-N + WiMAX 6250 (rev 5f)

[Hakan Deryal]

It's still not fixed in kernel 3.3-precise. This workaround works like a charm.

[Pete]

worked for me too. Lost wireless after upgrade to 11.10.