Public bug reported:

I have researched all possible solutions. The correct driver rt2800pci
is installed correctly out of the box. No hardware faults. Wifi works on
Ubuntu 14.04 with rt2800pci, but better with rt5390sta fixed for Ralink
wlan driver found here
https://github.com/wapmesquita/2011_1007_RT5390_RT5392_Linux_STA_V2.5.0.3_DPO_v2

This fix does not work for 16.04.

I can sometimes regain functionality for a limited time by using network
manager to un-check "Enable Networking" and the recheck it.

I have tried connecting by Ethernet cable and get the same behavior.

Description: Ubuntu 16.04.1 LTS
Release: 16.04

Ubuntu 4.4.0-36.55-generic 4.4.16

pcilib: sysfs_read_vpd: read failed: Connection timed out

N: Unable to locate package rt2800pci

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
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  c          3056 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Sep 12 23:20:43 2016
HibernationDevice: RESUME=UUID=43ee12f4-be75-44a8-8a7f-767c3d6ec102
InstallationDate: Installed on 2016-08-10 (33 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: ASUSTeK COMPUTER INC. X45A
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic.efi.signed 
root=UUID=c4ae6793-3631-4ddf-9fae-7329aa048736 ro quiet splash vt.handoff=7
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
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/14/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X45A.209
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X45A
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrX45A.209:bd09/14/2012:svnASUSTeKCOMPUTERINC.:pnX45A:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX45A:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: X45A
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug xenial

** Attachment added: "lspci-vnvn.log"
   
https://bugs.launchpad.net/bugs/1622853/+attachment/4739671/+files/lspci-vnvn.log

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https://bugs.launchpad.net/bugs/1622853

Title:
   Wfif disconnects throughout session and is unusualy slow during
  connection. RT5390 Wireless 802.11n 1T/1R PCIe rt2800pci
  4.4.0-36-generic

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