USB Wifi drops out every 2 minutes, needs disconnecting / reconnecting to work for a further 2 minutes

Bug #1420766 reported by Duncan on 2015-02-11
This bug affects 5 people
Affects Status Importance Assigned to Milestone
network-manager (Ubuntu)

Bug Description

Wifi says it's connected at all times but the internet drops out and nothing connects on WLAN or the internet.

Every 2 minutes, I disconnect and reconnect to make it work again but it soon drops out again.

Recently upgraded from Ubuntu 11 where everything worked with 3rd party drivers that don't work with current version.

ALl help gratefully received.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: linux-image-3.16.0-30-generic 3.16.0-30.40
ProcVersionSignature: Ubuntu 3.16.0-30.40-generic 3.16.7-ckt3
Uname: Linux 3.16.0-30-generic i686
ApportVersion: 2.14.7-0ubuntu8.1
Architecture: i386
 /dev/snd/controlC0: denzil 1953 F.... pulseaudio
 /dev/snd/controlC1: denzil 1953 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Feb 11 23:02:21 2015
HibernationDevice: RESUME=UUID=78e81787-eebb-4e88-9c8f-8e766633b555
InstallationDate: Installed on 2015-01-17 (24 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release i386 (20141022.1)
MachineType: Dell Inc. OptiPlex 755
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-30-generic root=UUID=cff858b0-1018-474f-9e05-9b9c556233c5 ro quiet splash vt.handoff=7
 linux-restricted-modules-3.16.0-30-generic N/A
 linux-backports-modules-3.16.0-30-generic N/A
 linux-firmware 1.138.1
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install) 03/11/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09 0DR845
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd03/11/2008:svnDellInc.:pnOptiPlex755:pvr:rvnDellInc.:rn0DR845:rvr:cvnDellInc.:ct3:cvr: OptiPlex 755
dmi.sys.vendor: Dell Inc.

Duncan (shieldsduncan) wrote :

This change was made by a bot.

Changed in linux (Ubuntu):
status: New → Confirmed
Changed in linux (Ubuntu):
importance: Undecided → High
affects: linux (Ubuntu) → network-manager (Ubuntu)
Changed in network-manager (Ubuntu):
status: Confirmed → New
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in network-manager (Ubuntu):
status: New → Confirmed
Michiel (michielhaisma) wrote :

I have a similar issue, where exactly every 2 minutes the bandwidth drops from ~50mbit to ~3mbit for a second or two, then goes back up. No dropped packets or anything reported. Tested with iperf. Wired connection shows no issue at all. Happens on both TCP and UDP tests.

I have the same or similar issue at times, at least on one computer running Ubuntu 12.04.

- Blossom

groucho (grouchomarx-fr) wrote :

NetworkManager does a scan every 2 minutes.
It can lead to latency issues, lost packets or disconnections.

To disable it, you can set the BSSID in your WIFI access point profile (in the network settings).

Maybe this will fix your issue.

farid (faridfedora) wrote :

i have a same problem in ubuntu 14.04..but in my case it's not exactly 2 minute...most of times when i download a huge file everything's ok but when network is idle it gets reminds me sth like power saving mode! i thought maybe its cause of new thechnology of my new laptop because on my older laptop i didnt have same problem.
laptop model: ASUS k550vx

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