Unable to connect to WiFi with new usb dongle network adapter

[Alekssan]

I’ve installed rtl8821cu-kmp-default and applied the MOK certificate, blocked the old modules.

I still can’t establish connection with my wifi hotspot: NetworkManager lists me available connections, I try mine and it keeps asking me for the WiFi password in the Wi-Fi password dialog from KDE Daemon.

In a few days I’ll be able to try it with my friend’s phone as the hotspot. In the meantime maybe I can post some useful logs here?

[Sauerland]

Post once more:

@Alekssan

inxi -naz

and

grep -i rtw88 /etc/modprobe.d/*

[Alekssan]

➜  ~ inxi -naz
Network:
  Device-1: Realtek RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet
    vendor: ASRock driver: r8169 v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 1
    port: d000 bus-ID: 08:00.0 chip-ID: 10ec:8168 class-ID: 0200
  IF: eth0 state: down mac: <filter>
  Device-2: Realtek 802.11ac NIC driver: rtl8821cu type: USB rev: 2.0
    speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-10:4 chip-ID: 0bda:c811
    class-ID: 0000 serial: <filter>
  IF: wlan1 state: dormant mac: <filter>

  ➜  ~ grep -i rtw88 /etc/modprobe.d/*
/etc/modprobe.d/rtw88.conf:blacklist rtw88_usb
/etc/modprobe.d/rtw88.conf:blacklist rtw88_8821cu

I still have to unplug the device before starting my PC, so that grub won’t fail again.