[Dell XPS 9333] WiFi dropping on

[Derek]

Wifi drops on Intel Corporation Wireless 7260, on a Dell XPS 9333.

It happens on a D-Link DIR-625 but not on a Netgear WNDR4500 wireless router. The main symptom is, even while next to the router, the connection stops responding every other minute, for minutes at a time.

It seems if I leave my computer running the command "ping 8.8.8.8" it will ping for roughly a minute, fine, and then stop, then resume, and so on.

See bug #1315221

02:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b)
        Subsystem: Intel Corporation Dual Band Wireless-AC 7260
        Flags: bus master, fast devsel, latency 0, IRQ 58
        Memory at f0400000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: <access denied>
        Kernel driver in use: iwlwifi

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: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: derek 2642 F.... pulseaudio
 /dev/snd/controlC0: derek 2642 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Jun 16 17:06:53 2014
HibernationDevice: RESUME=UUID=44d65992-42b9-4e97-b78b-0df642d296b2
InstallationDate: Installed on 2014-04-17 (60 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 1.127.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/11/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A02
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.:bvrA02:bd12/11/2013: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.

[Derek (avastmc)]

derek@exa:~$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
A04
03/19/2014

I'm now posting this from an Android AP just fine. I'd say it were an issue with just this D-Link router, however the windows PCs using it are fine. Is there any other way I can help trace this?

[Derek (avastmc)]

On a hunch (and looking at dmesg), I changed encryption to WPA and it seems to have stopped. It was set up on WEP for some old computer that's no longer around.

I also found out that there have been some issues with the other users here so this is *probably* a router issue. They have been power cycling the router every few days when their PC fails to associate.

Thank you for your help.

[penalvch (penalvch)]

Derek, this bug report is being closed due to your last comment regarding this being fixed with a configuration change. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.

[Niko Nieminen (niko-o)]

I have this issue also: Wifi drops randomly but I think it happens only when I'm plugged off from the charging cable?
When I plug it back in the wifi works again.

I did debug the problem with ping and it seems that when I'm on battery I do not receive some packets or I receive some with delay but as soon as I plug the charging cable back I receive those missed packets with huge delay.

When I plug off my charging cable my syslog shows:
Jun 18 22:34:07 xps kernel: [ 9584.125828] ahci 0000:00:1f.2: port does not support device sleep

And when I plug it in again I get:
Jun 18 22:36:39 xps kernel: [ 9735.942015] ahci 0000:00:1f.2: port does not support device sleep
Jun 18 22:36:39 xps anacron[9292]: Anacron 2.3 started on 2014-06-18
Jun 18 22:36:39 xps anacron[9292]: Normal exit (0 jobs run)
Jun 18 22:36:41 xps kernel: [ 9737.707044] ata3.00: exception Emask 0x10 SAct 0x3 SErr 0x50000 action 0xe frozen
Jun 18 22:36:41 xps kernel: [ 9737.707047] ata3.00: irq_stat 0x00400000, PHY RDY changed
Jun 18 22:36:41 xps kernel: [ 9737.707049] ata3: SError: { PHYRdyChg CommWake }
Jun 18 22:36:41 xps kernel: [ 9737.707051] ata3.00: failed command: WRITE FPDMA QUEUED
Jun 18 22:36:41 xps kernel: [ 9737.707054] ata3.00: cmd 61/08:00:98:09:dc/00:00:17:00:00/40 tag 0 ncq 4096 out
Jun 18 22:36:41 xps kernel: [ 9737.707054] res 40/00:0c:38:aa:1f/00:00:18:00:00/40 Emask 0x10 (ATA bus error)
Jun 18 22:36:41 xps kernel: [ 9737.707056] ata3.00: status: { DRDY }
Jun 18 22:36:41 xps kernel: [ 9737.707057] ata3.00: failed command: WRITE FPDMA QUEUED
Jun 18 22:36:41 xps kernel: [ 9737.707059] ata3.00: cmd 61/08:08:38:aa:1f/00:00:18:00:00/40 tag 1 ncq 4096 out
Jun 18 22:36:41 xps kernel: [ 9737.707059] res 40/00:0c:38:aa:1f/00:00:18:00:00/40 Emask 0x10 (ATA bus error)
Jun 18 22:36:41 xps kernel: [ 9737.707060] ata3.00: status: { DRDY }
Jun 18 22:36:41 xps kernel: [ 9737.707063] ata3: hard resetting link
Jun 18 22:36:41 xps kernel: [ 9738.428043] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
Jun 18 22:36:41 xps kernel: [ 9738.430887] ata3.00: configured for UDMA/133
Jun 18 22:36:41 xps kernel: [ 9738.444026] ahci 0000:00:1f.2: port does not support device sleep
Jun 18 22:36:41 xps kernel: [ 9738.444039] ata3: EH complete

And this happens only at my home. When I'm at the office, wifi works just fine.
With my previous laptop with Ubuntu installed I hadn't any problems with wifi and my home router
It is Netwjork 150Mbps -router with WPA2 enabled and it's pretty old one but no one else in my home is experiencing these kind of problems and there are 4 other people using the same wlan.

I already have A04 BIOS and sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date returns

A04
03/19/2014

[penalvch (penalvch)]

Niko Nieminen, this bug report is closed, so your issue is not going to be addressed here. However, so your hardware and problem may be tracked, could you please file a new report with Ubuntu by executing the following in a terminal while booted into the default Ubuntu kernel (not a mainline one) via:
ubuntu-bug linux

For more on this, please read the official Ubuntu documentation:
Ubuntu Bug Control and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue
Ubuntu Kernel Team: https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports
Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette

When opening up the new report, please feel free to subscribe me to it.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs