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[Gabriel Faure <1324095@xxxxxxxxxxxxxxxxxx>]

I also USED to run (L)ubuntu 14.04 on a Yoga 2 pro 13, but after an "upgrade" (around the middle of June, 2014), I lost the ability to connect to WiFi.  When I tried to re-install Lubuntu from a USB with an ISO on it, it failed to connect to the WiFi, and claims that the WiFi is Harware blocked, even though there are no switches or function keys to block the WiFi hardwarely. 
This ideapa_laptop module has been a pain from the first day with the (otherwise very nice) Yoga 2 Pro.  
WHEN IS THERE GOING TO BE A VERSION OF (L)ubuntu which will be installable without bug-avoiding tweaking like compiling patches, etc.?  Should I wait for 14.10?

Thanks.

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Title:
  [Lenovo Yoga 2 Pro] ideapad_laptop kernel module breaks wireless

Status in The Linux Kernel:
  Unknown
Status in “linux” package in Ubuntu:
  Triaged
Status in “linux” package in Fedora:
  Unknown

Bug description:
  With the ideapad_laptop module loaded there is no wlan0 (or other wifi
  device) present. Booting without any explicit blacklist config the
  ideapad_laptop kernel module gets loaded, and there are no wlan0
  device present.

  If I yet again load the ideapad_laptop module, using modprobe, the wlan0 device goes away. Here is the dmesg output from that.
  [  234.351406] input: Ideapad extra buttons as /devices/platform/VPC2004:00/input/input17
  [  234.353261] wlan0: deauthenticating from d8:5d:4c:bb:1a:f2 by local choice (reason=3)
  [  234.398900] cfg80211: Calling CRDA to update world regulatory domain
  [  234.401410] cfg80211: World regulatory domain updated:
  [  234.401412] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
  [  234.401414] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
  [  234.401415] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
  [  234.401416] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
  [  234.401418] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
  [  234.401419] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
  [  234.555068] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

  WORKAROUND: For the wireless network to work on my Lenovo Yoga 2 Pro Laptop I need blacklist/rmmod the ideapad_laptop kernel module. Running rmmod on the module results in the wlan0 device becoming present, and NetworkManager being able to connect to a local wifi network. Here is the dmesg output after the rmmod command:
  [   74.908411] iwlwifi 0000:01:00.0: L1 Disabled; Enabling L0S
  [   74.908627] iwlwifi 0000:01:00.0: L1 Disabled; Enabling L0S
  [   74.920538] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
  [   76.371036] wlan0: authenticate with d8:5d:4c:bb:1a:f2
  [   76.372069] wlan0: send auth to d8:5d:4c:bb:1a:f2 (try 1/3)
  [   76.376670] wlan0: authenticated
  [   76.378169] wlan0: associate with d8:5d:4c:bb:1a:f2 (try 1/3)
  [   76.381908] wlan0: RX AssocResp from d8:5d:4c:bb:1a:f2 (capab=0x411 status=0 aid=2)
  [   76.383305] wlan0: associated
  [   76.383333] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-27-generic 3.13.0-27.50
  ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
  Uname: Linux 3.13.0-27-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  andreas    2492 F.... pulseaudio
   /dev/snd/controlC0:  andreas    2492 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed May 28 14:00:22 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-05-20 (8 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 20266
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic.efi.signed root=UUID=e70835c5-4ffe-49d3-aecc-403dbf538c1a ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-27-generic N/A
   linux-backports-modules-3.13.0-27-generic  N/A
   linux-firmware                             1.127.2
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/31/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 76CN31WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Yoga2
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900056PRO
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo Yoga 2 Pro
  dmi.modalias: dmi:bvnLENOVO:bvr76CN31WW:bd10/31/2013:svnLENOVO:pn20266:pvrLenovoYoga2Pro:rvnLENOVO:rnYoga2:rvr31900056PRO:cvnLENOVO:ct10:cvrLenovoYoga2Pro:
  dmi.product.name: 20266
  dmi.product.version: Lenovo Yoga 2 Pro
  dmi.sys.vendor: LENOVO

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