Kernel module "ideapad_laptop" kills WiFi on Lenovo Yoga C930 (18.10 Cosmic)

Bug #1815312 reported by Peter Bittner on 2019-02-09

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8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Medium
Unassigned

Bug Description

I've just made a fresh install of Ubuntu 18.10 Cosmic on a brand-new Lenovo Yoga C930. The installation went super-fast, but in the end there was no WiFi.

$ uname -a
Linux roma 4.18.0-10-generic #11-Ubuntu SMP Thu Oct 11 15:13:55 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Turns out that I had to blacklist the kernel module "ideapad_laptop" to make everything work just fine. Several sources report this online, e.g. [¹]. I've been told on IRC #ubuntu that there's an alternative approach to get this fixed w/o blacklisting, see [²].

Other Lenovo Yoga models seem to be affected likewise, e.g. the C920. According to user jeremy31 on IRC this issue has existed for a few years, and a user ryuo wrote the code he provides as a fix on GitHub.

Can this be fixed upstream to make a fresh installation "just work" out of the box?

[¹] https://forums.lenovo.com/t5/Lenovo-Yoga-Series-Notebooks/Wifi-is-hardware-disabled/td-p/1307405
[²] https://askubuntu.com/questions/1104218/
---
ProblemType: Bug
ApportVersion: 2.20.10-0ubuntu13
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: tania 1774 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.10
InstallationDate: Installed on 2019-02-09 (0 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 8087:0025 Intel Corp.
 Bus 001 Device 003: ID 06cb:0081 Synaptics, Inc.
 Bus 001 Device 002: ID 5986:2115 Acer, Inc
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 81C4
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-10-generic root=UUID=2e92f9c4-d0eb-48d7-a859-e2daac156551 ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
RelatedPackageVersions:
 linux-restricted-modules-4.18.0-10-generic N/A
 linux-backports-modules-4.18.0-10-generic N/A
 linux-firmware 1.175
Tags: cosmic
Uname: Linux 4.18.0-10-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/13/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: 8GCN30WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0R32862 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo YOGA C930-13IKB
dmi.modalias: dmi:bvnLENOVO:bvr8GCN30WW:bd07/13/2018:svnLENOVO:pn81C4:pvrLenovoYOGAC930-13IKB:rvnLENOVO:rnLNVNB161216:rvrSDK0R32862WIN:cvnLENOVO:ct31:cvrLenovoYOGAC930-13IKB:
dmi.product.family: YOGA C930-13IKB
dmi.product.name: 81C4
dmi.product.sku: LENOVO_MT_81C4_BU_idea_FM_YOGA C930-13IKB
dmi.product.version: Lenovo YOGA C930-13IKB
dmi.sys.vendor: LENOVO
---
ProblemType: Bug
ApportVersion: 2.20.10-0ubuntu13.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: tania 1860 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.10
InstallationDate: Installed on 2019-02-09 (0 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 8087:0025 Intel Corp.
 Bus 001 Device 003: ID 06cb:0081 Synaptics, Inc.
 Bus 001 Device 002: ID 5986:2115 Acer, Inc
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 81C4
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-15-generic root=UUID=2e92f9c4-d0eb-48d7-a859-e2daac156551 ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 4.18.0-15.16-generic 4.18.20
RelatedPackageVersions:
 linux-restricted-modules-4.18.0-15-generic N/A
 linux-backports-modules-4.18.0-15-generic N/A
 linux-firmware 1.175.1
Tags: cosmic
Uname: Linux 4.18.0-15-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/13/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: 8GCN30WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0R32862 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo YOGA C930-13IKB
dmi.modalias: dmi:bvnLENOVO:bvr8GCN30WW:bd07/13/2018:svnLENOVO:pn81C4:pvrLenovoYOGAC930-13IKB:rvnLENOVO:rnLNVNB161216:rvrSDK0R32862WIN:cvnLENOVO:ct31:cvrLenovoYOGAC930-13IKB:
dmi.product.family: YOGA C930-13IKB
dmi.product.name: 81C4
dmi.product.sku: LENOVO_MT_81C4_BU_idea_FM_YOGA C930-13IKB
dmi.product.version: Lenovo YOGA C930-13IKB
dmi.sys.vendor: LENOVO

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1815312

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
tags: added: cosmic

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tags: added: apport-collected
description: updated

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description: updated

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Peter Bittner (peter-bittner) wrote :

Updated the collected information after running the first `apt-get upgrade && apt-get dist-upgrade`.

Brad Figg (brad-figg) on 2019-02-09
tags: added: bjf-tracking
Anthony Wong (anthonywong) wrote :

Can you undo what you have done and then try the kernel at http://people.canonical.com/~ypwong/lp1815312 to see if it fixes the problem?

Changed in linux (Ubuntu):
importance: Undecided → Medium
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