Public bug reported:
On Lenovo W530, after upgrade from 14.04 to 16.04:
Although wifi card is still connected to the wifi-router (network manager
states so), no user traffic is passing through after a few seconds from
authentication.
Workaround: 'iwconfig wlan0 power off' executed after the connection
becomes unusable brings it back to operation.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-36-generic 4.4.0-36.55
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: kgar 4992 F.... pulseaudio
/dev/snd/controlC0: kgar 4992 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Aug 31 10:48:01 2016
HibernationDevice: RESUME=UUID=eeaac5ff-7cb9-4674-963c-2641065f84b6
InstallationDate: Installed on 2014-01-17 (956 days ago)
InstallationMedia: It
MachineType: LENOVO 244759G
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic
root=UUID=20cbb6d9-2c69-427b-a27f-09a0787436b9 ro quiet splash
RelatedPackageVersions:
linux-restricted-modules-4.4.0-36-generic N/A
linux-backports-modules-4.4.0-36-generic N/A
linux-firmware 1.157.3
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-08-13 (18 days ago)
dmi.bios.date: 02/27/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: G5ET92WW (2.52 )
dmi.board.asset.tag: Not Available
dmi.board.name: 244759G
dmi.board.vendor: LENOVO
dmi.board.version: Win8 Pro DPK TPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrG5ET92WW(2.52):bd02/27/2013:svnLENOVO:pn244759G:pvrThinkPadW530:rvnLENOVO:rn244759G:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 244759G
dmi.product.version: ThinkPad W530
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1618782
Title:
wifi stops functioning briefly after connecting to network
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