I don't have an perfect idea about that..But yes, as per my experience may be there is something wrong from v4.0 kernels because this problem started from the initial release of ubuntu 16.04 which came along with the kernel v4.2...The problem was ralink wifi "disabled by default"..when you go on to settings you find that airplaine mode is enabled by default and you cant disable it. Even when you compile another driver for this WIFI card somehow it shows up but still its useless because it doesn’t detect the wifi connections nearby....because its blocked.
Something is messing up with Ralink or there is some bug in kernel itself which preventing this wifi from activating. This problem is still present in Ubuntu and its derivatives which are based from 16.04 to the present builds. #1745636 problem is same. the wifi key doesn't unlocks the wifi nor even Rfkill command. I have been filling this bug from last 2 year but still the problem exists. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1577140 Title: Wifi Ralink R3290 disabled by default in ubuntu 16.04 Status in linux package in Ubuntu: Confirmed Bug description: I have my personal laptop and it contains PCI Ralink r3290 wifi adaptor with bluetooth and when i have installed the fresh version of Ubuntu 16.04x64 it doesn’t work at all on boot up. The wifi is disabled by default and the it doesn’t activates even by pressing the key and when i go the network settings airplane mode is also enabled and when i try to disable airplane mode it switches back on. I dont know whats going wrong. Earlier my wifi works on ubuntu 15.04. I have tried almost every solution and none works in the latest LTS release. Please help I am unable to use internet in ubuntu ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-21-generic 4.4.0-21.37 [modified: boot/vmlinuz-4.4.0-21-generic] ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 Uname: Linux 4.4.0-21-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: shankey 1536 F.... pulseaudio /dev/snd/controlC1: shankey 1536 F.... pulseaudio CurrentDesktop: Unity Date: Sun May 1 17:02:12 2016 HibernationDevice: RESUME=UUID=9fdda691-a6ae-4494-99e3-b76fde1f33a6 InstallationDate: Installed on 2016-04-24 (7 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) Lsusb: Bus 001 Device 003: ID 05c8:036e Cheng Uei Precision Industry Co., Ltd (Foxlink) Webcam Bus 001 Device 002: ID 8087:8000 Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Hewlett-Packard Compaq 15 Notebook PC ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=609ae58a-a43f-4f7b-9a61-e21d3caf457a ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-21-generic N/A linux-backports-modules-4.4.0-21-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/26/2015 dmi.bios.vendor: Insyde dmi.bios.version: F.39 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: 2211 dmi.board.vendor: Hewlett-Packard dmi.board.version: 86.52 dmi.chassis.asset.tag: Chassis Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsyde:bvrF.39:bd05/26/2015:svnHewlett-Packard:pnCompaq15NotebookPC:pvr0991100000000000000600087:rvnHewlett-Packard:rn2211:rvr86.52:cvnHewlett-Packard:ct10:cvrChassisVersion: dmi.product.name: Compaq 15 Notebook PC dmi.product.version: 0991100000000000000600087 dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1577140/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp