Mostly just confirming what @boratko already shared, plus perhaps a few new details:
The ingredients needed to reproduce this bug on Vivid: 1) Intel 3160 WiFi card 2) Boot with bluetooth enabled (turn on in the bluetooth indicator and reboot if needed) 3) Connect to a 2.4 GHz N router In this situation, I've not once successfully connected to my AP. When my SSID shows up in NetworkManager, attempting to connect my AP will fail and there is an error in dmesg about the authentication timing out. But occasionally the SSID wont even show up in NetworkManager, so I can't try to connect to it. With the same hardware and same scenario, this bug is not present when running 14.04.2 (with Utopic HWE). Some other details: 1) Turning off bluetooth (from the indicator) and rebooting seems a reliable way to work-around this 2) There are no issues when connecting to a 5 GHz AC router, and based on feedback from System76 customers, it seems 5 GHz N is fine and 2.4 GHz G is likewise fine ( the problem is seemingly limited to just 2.4 GHz N) 3) This problem is not present with Intel 7260 WiFi cards, only the 3160 4) I confirmed that the 4.1rc2 mainline build fixes this issue: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.1-rc2-vivid/ -- 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/1442411 Title: Intel 3160 wireless card no longer able to connect to wifi networks Status in linux package in Ubuntu: Triaged Bug description: Laptop: Lenovo Y70 Touch Wireless Card: Intel Corporation Wireless 3160 (rev 93) When running Ubuntu Gnome 14.10 (on a live USB drive) I am able to connect to wifi networks without any issue. When running Ubuntu Gnome 15.04 (either on live USB or installed and fully updated) I am able to see the list of available wifi networks, but not able to connect. Selecting one and entering the password makes the network manager applet indicate that it is "Connecting..." but then it gives up after about a minute or so and reverts back to "Not Connected". I have tested this without network encryption as well, and the same result occurs. I have ran a wifi debugging script, here is the output: For Ubuntu 14.10 - http://pastebin.com/aLUhTyrM For Ubuntu 15.04 - http://pastebin.com/f0yRjQUC Again, the card seems to work perfectly on 14.10, but is unable to connect to any networks on 15.04. WORKAROUND: Boot with bluetooth turned off. If the computer boots with the bluetooth turned on, the wifi will not work, even if you first turn off the bluetooth. A restart is needed. --- ApportVersion: 2.17-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: mboratko 1609 F.... pulseaudio /dev/snd/controlC1: mboratko 1609 F.... pulseaudio CurrentDesktop: GNOME DistroRelease: Ubuntu 15.04 EcryptfsInUse: Yes InstallationDate: Installed on 2015-04-10 (0 days ago) InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Beta amd64 (20150326) MachineType: LENOVO 80DU Package: linux (not installed) ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-12-generic.efi.signed root=UUID=0fb46cba-f7ac-4bc5-aa7d-5f6aa74636c1 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.19.0-12.12-generic 3.19.3 RelatedPackageVersions: linux-restricted-modules-3.19.0-12-generic N/A linux-backports-modules-3.19.0-12-generic N/A linux-firmware 1.143 Tags: vivid UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' Uname: Linux 3.19.0-12-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm bumblebee cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 02/11/2015 dmi.bios.vendor: LENOVO dmi.bios.version: 9ECN37WW(V2.01) dmi.board.asset.tag: 31900058WIN dmi.board.name: Lenovo Y70-70 Touch dmi.board.vendor: LENOVO dmi.board.version: 31900058WIN dmi.chassis.asset.tag: 31900058WIN dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Y70-70 Touch dmi.modalias: dmi:bvnLENOVO:bvr9ECN37WW(V2.01):bd02/11/2015:svnLENOVO:pn80DU:pvrLenovoY70-70Touch:rvnLENOVO:rnLenovoY70-70Touch:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoY70-70Touch: dmi.product.name: 80DU dmi.product.version: Lenovo Y70-70 Touch dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1442411/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
