kernel-packages team mailing list archive

[Jason Gerard DeRose <jason@xxxxxxxxxxxx>]

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/

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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

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