Very unstable wifi connection after upgrade to 12.04 (Intel Ultimate-N 6300)

[mejo]

I have the same problem, tried the two sudo and they did not help.

I also tried to add "the option '11n_disable=1' for module iwlwifi in /etc/modprobe.d.", but I don't even find the file, ...

You can write the option to whatever file you like inside /etc/modprobe.d/. The whole directory is sourced by modprobe. I for example added a file /etc/modprobe.d/thinkpad.conf with (among others) the entry:

# disable 11n functionality to stabilize wifi
options iwlwifi 11n_disable=1

could anyone help me? Do I need to check my hardware? better if I could just change config files...

If that doesn't help, then I've no glue either, sorry.

[chili555]

Do I need to check my hardware?

Yes, please run and post:

lspci -nn | grep 0280

but I don't even find the file,

The idea is, if we determine you need the file, we create the file. If the parameter didn't help, I doubt the file will help. We'll probably need to dig deeper.

[cleopatra]

Yes, please run and post:

lspci -nn | grep 0280

The idea is, if we determine you need the file, we create the file. If the parameter didn't help, I doubt the file will help. We'll probably need to dig deeper.

Hi chili and mejo!

here it is, seems to be a constant hardware config:

$ lspci -nn | grep 0280
05:00.0 Network controller [0280]: Atheros Communications Inc. AR9287 Wireless Network Adapter (PCI-Express) [168c:002e] (rev 01)

A WEIRD thing is that I only have this wifi problem at home. And at home, it sometimes works fast, sometimes really slow, sometimes seemingly stagnant...

Now the wifi at home is ok. So maybe I should run some command when it runs slow to diagnose?

[chili555]

You don't have an Intel card, the subject of this thread. Please start a new thread and send me a PM if I don't catch it right away.

Atheros Communications Inc. AR9287 Wireless Network Adapter (PCI-Express) [168c:002e]

[albahnsen]

Hi,

I'm having the same issue. already try the proposed solution but it only works for some time.

02:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6205 [8086:0082] (rev 34)

Thanks.

[chili555]

but it only works for some time.

Meaning what? It stops working effectively after a reboot or after an hour??

[albahnsen]

Meaning what? It stops working effectively after a reboot or after an hour??

About a month. but since last week or so start having problems again.

Thanks.

[chili555]

About a month. but since last week or so start having problems again.

Thanks.

Please change the file you created from this:

options iwlwifi 11n_disable=1

...to this:

options iwlwifi 11n_disable=1 bt_coex_active=N

Reboot and let it run for a while and let us have your report.

[albahnsen]

Thanks! I will let you know how it works.

[albahnsen]

Please change the file you created from this:

options iwlwifi 11n_disable=1

...to this:

options iwlwifi 11n_disable=1 bt_coex_active=N

Reboot and let it run for a while and let us have your report.

Guys it work for 3 days, but today it starts being unstable again. Now is different than before, every time it disconnect then it reconnects after a minute, in the past it would not reconnect until I restart.

thanks.