[Dell Latitude E7440] Wifi keeps dropping with Intel Wireless 7260 (rev 73)

[Antoine-terracol]

As per the title, wifi keeps droppin on my Dell Latitude E7440 with Intel Corporation Wireless 7260 (rev 73)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-29-generic 3.13.0-29.53
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: antoine 2094 F.... pulseaudio
 /dev/snd/controlC1: antoine 2094 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Jun 11 21:04:58 2014
HibernationDevice: RESUME=UUID=4023a5df-0339-4a78-8b70-6f927a3f1f72
InstallationDate: Installed on 2014-05-14 (28 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. Latitude E7440
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=8e8e536c-d26d-4ade-8f03-4316547c834a ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-29-generic N/A
 linux-backports-modules-3.13.0-29-generic N/A
 linux-firmware 1.127.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/18/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 07F3F4
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd02/18/2014:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn07F3F4:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E7440
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.15 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.15-utopic/

[Jonathan H (d-linux-x)]

I am on 3.15.0-6-generic #11-Ubuntu SMP Thu Jun 12 00:40:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux and still have this issue.

sudo lshw -class network
*-network
       description: Wireless interface
       product: Wireless 7260
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:05:00.0
       logical name: wlan0
       version: 6b
       serial: 7c:7a:91:72:09:f7
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=3.15.0-6-generic firmware=23.214.9.0 ip=192.168.1.123 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
       resources: irq:47 memory:f7200000-f7201fff

lspci
05:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b)

[Seth Forshee (sforshee)]

Antoine-terracol: We recently incorporated some fixes into 14.04 to fix some disconnection issues seen with Intel 7260 wireless. Could you ensure that your system is fully up to date, reboot (making sure that you boot into the official trusty 3.13 kernel and not any newer kernel which you installed for testing), and let me know whether or not you're still having problems? If you are then we can continue trying to debug your issue. Thanks!

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

[Niels Holmgaard (niels-holmgard)]

I can confirm that the bug still exists in 14.10.

Please indicate if a new bugreport is needed via ubuntu-bug - I am on the same hardware as Antoine-terracol, but with a completely up-to-date stock Ubuntu x86_64 installation

[Seth Forshee (sforshee)]

Niels: Please do file a new bug report by running 'ubuntu-bug linux' after you've been experiencing problems so we can get logs from your machine. Please also subscribe me to the bug report. Thanks!