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Message #70980
[Bug 1324095] Re: [Lenovo Yoga 2 Pro] ideapad_laptop kernel module breaks wireless
came across this and it appears that the fedora guys have rolled in a
patch recently that resolved the issue. I'm unable to locate the
upstream defect for this, but their defect (which is essentially
identical to this one) is here:
https://bugzilla.redhat.com/show_bug.cgi?id=1021036
The patch appears to be relatively simple:
https://bugzilla.redhat.com/attachment.cgi?id=911300
Is there a link to the upsteam kernel defect to see if this has been
resolved?
** Bug watch added: Red Hat Bugzilla #1021036
https://bugzilla.redhat.com/show_bug.cgi?id=1021036
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https://bugs.launchpad.net/bugs/1324095
Title:
[Lenovo Yoga 2 Pro] ideapad_laptop kernel module breaks wireless
Status in “linux” package in Ubuntu:
Triaged
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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