ubuntu 20.04 WIFI not showing

[petewatcharawit]

After installing Ubuntu 20.04 for a week, the WIFI icon has disappeared. Using this command:

lspci | grep Wireless

returns
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter

I have updated the software using:

sudo apt update

sudo apt upgrade

and restart but the WIFI icon is still missing. My home WIFI works fine.

Any idea on how to solve the internet connection?

[wildmanne39]

Thread moved to Networking & Wireless for a more appropriate fit.

[praseodym]

If LAN works, run

sudo apt install build-essential dkms rtl8821ce-dkms

Reboot and turn off SecureBoot

[petewatcharawit]

I get this message
Reading package lists... Done
Building dependency tree
Reading state information... Done
dkms is already the newest version (2.8.1-5ubuntu1).
build-essential is already the newest version (12.8ubuntu1.1).
rtl8821ce-dkms is already the newest version (5.5.2.1-0ubuntu4~20.04.2).
The following package was automatically installed and is no longer required:
libfprint-2-tod1
Use 'sudo apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Then I disabled SecureBoot via BIOS setting. No WIFI still. Help please?

Note that running the command:

sudo lshw -C network

returns
*-network UNCLAIMED
description: Network controller
product: RTL8821CE 802.11ac PCIe Wireless Network Adapter
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress cap_list
configuration: latency=0
resources: ioport:f000(size=256) memory:fe900000-fe90ffff
*-network
description: Ethernet interface
physical id: 2
logical name: bnep0
serial: 8c:c8:4b:10:8f:68
capabilities: ethernet physical
configuration: broadcast=yes ip=192.168.44.74 multicast=yes

[petewatcharawit]

Problem solved.

I ran: [

sudo apt-get remove rtl8821ce-dkms

and then reinstall it:

sudo apt-get install rtl8821ce-dkms