[Lenovo Yoga 2 Pro] ideapad_laptop kernel module breaks wireless
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Invalid
|
Low
|
Unassigned |
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/
[ 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(
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(
[ 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(
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.13.0-27-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
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=
RelatedPackageV
linux-
linux-
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.
dmi.board.name: Yoga2
dmi.board.vendor: LENOVO
dmi.board.version: 31900056PRO
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 20266
dmi.product.
dmi.sys.vendor: LENOVO
Changed in linux (Fedora): | |
importance: | Unknown → Undecided |
status: | Unknown → Fix Released |
As mentioned in bug #1318038, booting the upstream kernel http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v3.15-rc5- utopic/ linux-image- 3.15.0- 031500rc5- generic_ 3.15.0- 031500rc5. 201405091635_ amd64.deb did not make any difference.