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My problem seems to be very similar to that detailed at Ubuntu 22.04: RTL8821CE-based wifi not working but the fix there (removing backport-iwlwifi-dkms) did not work for me (I apparently do not have backport-iwlwifi-dkms on my computer).

I had run into an issue with this wifi card long (more than a year, I think) ago, and had resolved it, but I seem to be dead in the water again.

I am currently accessing the internet with an old usb dongle, which is not very good (no 5G).

Any computer savvy-ness I ever had is probably 30 years out of date, so please forgive my cluelessness.

Any help appreciated.

Output of lspci -knn | grep Net -A3; rfkill list :

03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821]
    Subsystem: Hewlett-Packard Company RTL8821CE 802.11ac PCIe Wireless Network Adapter [103c:831a]
    Kernel modules: rtw88_8821ce
04:00.0 Non-Volatile memory controller [0108]: SK hynix Gold P31 SSD [1c5c:174a]
    Subsystem: SK hynix Gold P31 SSD [1c5c:174a]
0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

Kernal version is 5.19.0-32-generic

Output of grep rtw88_8821ce /etc/modprobe.d/* :

/etc/modprobe.d/blacklist.conf:blacklist rtw88_8821ce
Pilot6
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Joseph David Marsden
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  • Please [edit] your question and add output of lspci -knn | grep Net -A3; rfkill list terminal command. – Pilot6 Feb 16 '23 at 19:05
  • It looks like the rtw88_8821ce isn't loaded for some reason. What is the kernel version? – Pilot6 Feb 16 '23 at 19:10
  • Kernal version is 5.19.0-32-generic – Joseph David Marsden Feb 16 '23 at 19:11
  • You probably installed a 3rd party driver and blacklisted rtw88_8821ce. Please add output of grep rtw88_8821ce /etc/modprobe.d/*. And the old driver needs to be reinstalled. – Pilot6 Feb 16 '23 at 19:14
  • Yes; following another string about the RTL8821CE at https://askubuntu.com/questions/1401475/why-rtl8821ce-or-wifi-is-removed-during-kernel-update-on-20-04-4-lts I did pretty much exactly what you noted.

    output of grep rtw88_8821ce /etc/modprobe.d/*

    /etc/modprobe.d/blacklist.conf:blacklist rtw88_8821ce

     – Joseph David Marsden Feb 16 '23 at 19:18

3 Answers3

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You've blacklisted the rtw88_8821ce module when installing some other driver.

Now when kernel upgraded from 5.15 to 5.19 that driver installed from source didn't build.

You can remove that blacklist rtw88_8821ce from /etc/modprobe.d/blacklist.conf and run

sudo modprobe rtw88_8821ce

If you aren't satisfied with the in-tree module performance when considering to install some other driver, make sure it is compatible with the 5.19 kernel.

Pilot6
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I had the same issue as Joseph: after installing updates (in particular: the latest kernel 5.19....), wifi was gone.

Here is how I (apparently) solved it: I rebooted and chose the previous kernel version (5.15...), wifi was working again.

I removed rtl8821ce-dkms

sudo apt remove rtl8821ce-dkms

then rebooted into the latest kernel 5.19... wifi was working again.

Vinz M
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after kernel update to 5.19 my wifi adapter rtl8821ce got disabled

I updated kernel to 6.1.12-060112-generic

installed latest version of driver from https://github.com/tomaspinho/rtl8821ce

added to blacklist rtw88_8821ce (because with this driver wifi signal is weak)

Now my wifi works well

Ruslan
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