[RTL8821CE] WLAN functionality cannot be controlled any more

[Wolfgang Laun]

After the latest upgrade and a reboot, the WLAN connectivity features have disappeared from the menu on the upper right hand side menu, and the system does not connect to the local WLAN at my home; in short: WLAN DOES NOT WORK ANY MORE (Luckily, Ethernet connectivity is still available so I can send this using USB tethering.) New, however is Bluetooth connectivity control. Turning this off, turns on airplane mode; turning airplane mode off returns the Bluetooth control menu entry.

$ lspci -nnk -d::0280
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821]
 DeviceName: WLAN
 Subsystem: Hewlett-Packard Company RTL8821CE 802.11ac PCIe Wireless Network Adapter [103c:831a]
 Kernel modules: rtw88_8821ce

THIS DOES NOT REPORT A KERNEL DRIVER IN USE.

Thank you
Wolfgang

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 5.19.0-35.36~22.04.1-generic 5.19.17
Uname: Linux 5.19.0-35-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.3
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: unknown
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Thu Mar 9 05:12:28 2023
DistUpgraded: 2022-11-14 12:08:39,894 DEBUG icon theme changed, re-reading
DistroCodename: jammy
DistroVariant: ubuntu
DkmsStatus: rtl8821ce/5.5.2.1, 5.15.0-67-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Iris Plus Graphics G1 (Ice Lake) [8086:8a56] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Iris Plus Graphics G1 (Ice Lake) [103c:86c1]
InstallationDate: Installed on 2020-12-19 (809 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
MachineType: HP HP 250 G7 Notebook PC
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.19.0-35-generic root=UUID=ac8de2b3-079a-406a-af37-4891044b3642 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to jammy on 2022-11-14 (114 days ago)
dmi.bios.date: 07/31/2020
dmi.bios.release: 15.33
dmi.bios.vendor: Insyde
dmi.bios.version: F.33
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 86C1
dmi.board.vendor: HP
dmi.board.version: 89.35
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.ec.firmware.release: 89.35
dmi.modalias: dmi:bvnInsyde:bvrF.33:bd07/31/2020:br15.33:efr89.35:svnHP:pnHP250G7NotebookPC:pvrType1ProductConfigId:rvnHP:rn86C1:rvr89.35:cvnHP:ct10:cvrChassisVersion:sku1B7K9ES#ABD:
dmi.product.family: 103C_5336AN HP 200
dmi.product.name: HP 250 G7 Notebook PC
dmi.product.sku: 1B7K9ES#ABD
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.113-2~ubuntu0.22.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 22.2.5-0ubuntu0.1~22.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.3-2ubuntu2.7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1

[Daniel van Vugt (vanvugt)]

Thanks for the bug report.

If the built-in driver 'rtw88_8821ce' isn't working then please try the add-on driver:

  sudo apt update
  sudo apt full-upgrade
  sudo apt install rtl8821ce-dkms

and then reboot.

[Wolfgang Laun (wolfgang-laun)]

The suggested incantation worked: WLAN operable again. - Thanks!