Not work: "01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter"

[El jinete sin cabeza]

I am testing the driver for my WiFi adapter and after installing and restarting it does not work. I am currently working with a WiFi-USB.

Others:
Attach image

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: rtl8821ce-dkms 5.2.5.2.1.30816.20190425-0ubuntu1
ProcVersionSignature: Ubuntu 5.3.0-17.18-generic 5.3.1
Uname: Linux 5.3.0-17-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 8 11:39:56 2019
InstallationDate: Installed on 2018-12-02 (309 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
PackageArchitecture: all
SourcePackage: rtl8821ce
UpgradeStatus: Upgraded to eoan on 2018-12-02 (309 days ago)

[El jinete sin cabeza (ejsc-deactivatedaccount)]

I don't know if the module is really loaded. I attach the output of 'lsmod'.

[Anthony Wong (anthonywong)]

Hi,

From lsmod, the rtl8821ce module is not loaded.

Please attach these logs to this bug:

1. /var/log/dmesg
2. output of 'dkms status'

[Kai-Heng Feng (kaihengfeng)]

[ 3.449444] kernel: Lockdown: systemd-udevd: Loading of module with unavailable key is restricted; see man kernel_lockdown.7

Does the module load after disabling secure boot?

[El jinete sin cabeza (ejsc-deactivatedaccount)]

> Does the module load after disabling secure boot?

Yes!

[El jinete sin cabeza (ejsc-deactivatedaccount)]

Disable 'secure boot':

Working with module rtl8821ce load.

[El jinete sin cabeza (ejsc-deactivatedaccount)]

Disable 'secure boot':

Working with module rtl8821ce load.

[Anthony Wong (anthonywong)]

When installing DKMS, Ubuntu prompt you that it will be creating a new Machine-Owner key for you, and the key will be enrolled in your next reboot. Do you see that happen when you install the dkms package?

[El jinete sin cabeza (ejsc-deactivatedaccount)]

What commands should I do?

[Anthony Wong (anthonywong)]

You don't need to do anything to trigger the key generation and enrollment, everything should be automatic and you will be prompted for what to do when the DKMS package is installed.

I am going to attach some photos for you to see what should happen.

How did you install this DKMS package?

[El jinete sin cabeza (ejsc-deactivatedaccount)]

> How did you install this DKMS package?

1° Open 'synaptic'
2° Click 'Settings'
3° Click 'Repositories'
4° Click 'Additional Drivers'
5° Click 'Using DKMS source...'

A window did not appear requesting data as in its previous photos.

[Anthony Wong (anthonywong)]

Do you have /var/lib/shim-signed/mok/ and if so what's inside?

[El jinete sin cabeza (ejsc-deactivatedaccount)]

> Do you have /var/lib/shim-signed/mok/ and if so what's inside?

$ ls -lihsa /var/lib/shim-signed/mok/
total 12K
 200222 0 drwxr-xr-x 1 root root 38 mar 1 2019 .
 200221 0 drwxr-xr-x 1 root root 50 oct 9 15:32 ..
4531929 4,0K -rw-r--r-- 1 root root 927 mar 1 2019 MOK.der
4531928 4,0K -rw------- 1 root root 1,7K mar 1 2019 MOK.priv
4531930 4,0K -rw------- 1 root root 1,0K mar 1 2019 .rnd

[Anthony Wong (anthonywong)]

I suspect you have somehow missed the key enrollment step, as show in
https://bugs.launchpad.net/ubuntu/+source/rtl8821ce/+bug/1847283/+attachment/5295739/+files/photo_2019-10-09_12-40-35.jpg

Can you turn on secure boot again, then run:
sudo mokutil --import /var/lib/shim-signed/mok/MOK.der

Follow the instructions on screen. When you reboot again, just before loading GRUB, shim will show a blue screen, select “Enroll MOK” and follow the menus to finish the enrolling process. You will be asked for the password you typed in earlier when running mokutil.

After that, see if rtl8821ce is shown in lsmod.

[Launchpad Janitor (janitor)]

[Expired for rtl8821ce (Ubuntu) because there has been no activity for 60 days.]

[Michael Xavier (michaelsx)]

In ubuntu 22.04 the Wi-Fi worked but not the bluetooth so I installed the rtl8821ce-dkms driver through apt and when rebooting the system the Wi-Fi did not work.
HP 15-dw1073la

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.