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Issues with AC 7260 on Dell XPS 13 (9333) - Ubuntu 14.04.2

Asked by OpenFerret

Hi all,

I find that sometimes when I resume from standby mode that my wifi will not connect again and I cannot see the network that I was connected to. I have to restart my wireless access point and restart my wifi card.

I don't know if this is a duplicate issue or if I should report this as a bug... OR even what information might be required to help fix this issue. Can someone give me some direction.

Thanks!

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actionparsnip (andrew-woodhead666) said : 		#1

What is the output of:

sudo lshw -C network; lsb_release -a; uname -a

Thanks

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OpenFerret (q-rob-z) said : 		#2

user@ubuntu:~$ sudo lshw -C network; lsb_release -a; uname -a
  *-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: e8:2a:ea:4c:21:51
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=3.16.0-30-generic firmware=25.228.9.0 ip=192.168.0.4 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
       resources: irq:62 memory:f0400000-f0401fff
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.2 LTS
Release: 14.04
Codename: trusty
Linux ubuntu 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan 15 17:43:14 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

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actionparsnip (andrew-woodhead666) said : 		#3

Try:

echo "options iwlwifi bt_coex_active=0" | sudo tee /etc/modprobe.d/iwlwififix.conf > /dev/null

Reboot to test

Source:
http://ubuntuforums.org/showthread.php?t=1840116&page=3

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OpenFerret (q-rob-z) said : 		#4

I added:

options iwlwifi bt_coex_active=0
options iwlwifi 11n_disable=1

To the iwlwififix.conf file, aand that appears to have resolved the issue. Shame that "n" has to be disabled to get it to function, but at least it is not inconvienient anymore.

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OpenFerret (q-rob-z) said : 		#5

Thanks actionparsnip, that solved my question.

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OpenFerret (q-rob-z) said : 		#6

Apologies for re-opening...

I tested resuming the operating system multiple times and it seemed fine... But then the issue has started again. Looks like adding the fix to /etc/modprobe.d/ reduces the likelihood of the error occurring, but it hasn't stopped it completely.

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Launchpad Janitor (janitor) said : 		#7

This question was expired because it remained in the 'Open' state without activity for the last 15 days.