Ubuntu – Intel AC7260 wifi card disconnects and have to restart


I have a Dell XPS 9333 with Ubuntu 15.04 and Intel wifi card (ac7260). The wifi-ac connection is slow and it disconnects after couple of minutes (it varies). After the disconnect I have to reboot in order to reconnect.

I have the latest firmware for the kernel: driverversion=3.19.0-18-generic firmware=

Does anyone has any solution for linux and intel cards?

*I have also an external usb wifi from Edimax that doesn't have any issues – so only the laptop intel card has this issue.

radu@radu-XPS13-9333:~$ sudo lshw -C network
description: Wireless interface
product: Wireless 7260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: 6b
serial: 5c:51:4f:7c:93:b3
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.19.0-18-generic firmware= ip= latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:44 memory:f0400000-f0401fff
radu@radu-XPS13-9333:~$ lspci -nn
02:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b1] (rev 6b)

Best Answer

Did you read in the bug report you linked?

Performance is related to the access point. With some access point the laptop would not even connect, with other it will connect but not in a stable way, while with others it will work with no problems.

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. Check yours:[CODE]sudo iw reg get[/CODE]If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it temporarily:

sudo iw reg set IS

Of course, substitute your country code if not Iceland. 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:


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.

Reboot and let us know the result.

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