Comment 0 for bug 1806472

Callum Hutchinson (callumh003) wrote :

Received kernel patch 4.18.0-12 today on my machine. On reboot my WiFi appears to be unavailable.
lspci still recognises the installed RTL8822BE card and a reboot back to the previous kernel version (4.18.0-11) seems to resolve the problem.

We tried some debugging in the IRC channel and didn't get very far. The r8822be module alias is intact, trying to modprobe it or insert results in a "operation not permitted" error. Modprobing mac80211 and cfg80211 which r8822be depends on did not seem to help.

KMod Lists for -12 and -11 kernels:
https://paste.ubuntu.com/p/pwx5mKszVt/

`ls -latr /lib/modules/4.18.0-12-*/ ; grep -i B822 /lib/modules/4.18.0-12-*/modules.alias` :
https://paste.ubuntu.com/p/5zcCbXyM5g/

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: linux-image-4.18.0-11-generic 4.18.0-11.12
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: callum 2989 F.... pulseaudio
 /dev/snd/controlC0: callum 2989 F.... pulseaudio
CurrentDesktop: KDE
Date: Mon Dec 3 19:27:16 2018
InstallationDate: Installed on 2018-11-10 (22 days ago)
InstallationMedia: Kubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.2)
MachineType: LENOVO 90H90015UK
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-11-generic root=UUID=d5f81e09-382c-4759-8a6d-2503fe6959b4 ro quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.18.0-11-generic N/A
 linux-backports-modules-4.18.0-11-generic N/A
 linux-firmware 1.175.1
SourcePackage: linux
StagingDrivers: r8822be
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/15/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: O3FKT26A
dmi.board.name: 36E1
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN 3259620440547
dmi.chassis.type: 3
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrO3FKT26A:bd06/15/2018:svnLENOVO:pn90H90015UK:pvrLegionY720T-34ASU:rvnLENOVO:rn36E1:rvrSDK0J40709WIN3259620440547:cvnLENOVO:ct3:cvrNone:
dmi.product.family: Legion Y720T-34ASU
dmi.product.name: 90H90015UK
dmi.product.sku: LENOVO_MT_90H9_BU_LENOVO_FM_Legion Y720T-34ASU
dmi.product.version: Legion Y720T-34ASU
dmi.sys.vendor: LENOVO