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RTL8821CE wifi stopped working after 15-Feb-23 22.04 update and restart

rated 0 times [ 2] [ 0] / answers: 1 / hits: 679 / 2 Years ago, mon, april 18, 2022, 12:50:59

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Any computer savvy-ness I ever had is probably 30 years out of date, so please forgive my cluelessness.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

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horicgly

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answered 2 Years ago socelebrate · Accepted Answer

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.