Dell XPS 13 9333 with Intel 7260 poor range

[Derek]

With stock 14.04 kernel, wireless gets poor range and intermittently cuts out / lags. Additionally, at school, I can associate with AP for a few minutes, then it disconnects and repeatedly fails to reconnect until rebooting.

Tested kernel 3.19.0-031900 and the range issue went away, completely, and is acting as it should in a perfect world. (After spring break I'll report about the school's AP dropping me.)

This is identical to bug 1315221, except I'm reporting 3.13.0-27 and the issue usually doesn't occur if I'm within 15 feet of the router. (Actually, it just decided to prove me wrong now.)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-27-generic 3.13.0-27.50
ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
Uname: Linux 3.13.0-27-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: derek 2602 F.... pulseaudio
 /dev/snd/controlC1: derek 2602 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Mar 15 23:39:06 2015
HibernationDevice: RESUME=UUID=44d65992-42b9-4e97-b78b-0df642d296b2
InstallationDate: Installed on 2014-04-17 (332 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. XPS13 9333
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=9f068afb-074c-4838-b5be-f3a75fef7999 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-27-generic N/A
 linux-backports-modules-3.13.0-27-generic N/A
 linux-firmware 1.127.11
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/19/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 0GFTRT
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA04:bd03/19/2014:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn0GFTRT:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: XPS13 9333
dmi.sys.vendor: Dell Inc.

[Brad Figg (brad-figg)]

This change was made by a bot.

[penalvch (penalvch)]

Derek, thank you for reporting this and helping make Ubuntu better. To see if this is already fixed in Ubuntu, could you please test http://cdimage.ubuntu.com/daily-live/current/ and advise to the results?

[Derek (avastmc)]

I'll check this out ASAP. I noticed that with the 3.19 kernel, battery life is reduced to about half the time as before.

[Launchpad Janitor (janitor)]

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