WIFI card rtl8821ce cannot connect to 5GHz networks
I'm currently on Ubuntu20.04(dual boot with Windows), and after too many attempts to install a driver for my laptop WIFI to get work. Well, it works..
because I'm new to Linux system and i don't know so much detail, i used Tomaspinho driver, which was the easiest way for me and followed This tutorial (the driver also suggested by some askubuntu highlights)
it connects but only connects to the Access Point via 2.4GHz. As far as i know, my WIFI card(PCIe Realtek 8821ce) capable of connecting to 5GHz networks, i know that because i connected to 5GHz network on my Windows, here is the output of iwconfig wlo1:
:~$ iwconfig wlo1 wlo1 IEEE 802.11bgn ESSID:"TISHKNET" Nickname:"<WIFI@REALTEK>" Mode:Managed Frequency:2.447 GHz Access Point: 50:68:0A:C1:81:62 Bit Rate:72.2 Mb/s Sensitivity:0/0 Retry:off RTS thr:off Fragment thr:off Power Management:off Link Quality=94/100 Signal level=-56 dBm Noise level=0 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0i read an article that says that my card should be anIEEE 802.11ac to be able to connect to 5GHz networks, what i can do to connect my 5GHz network? any advice would be appreciated :)
3 Answers
sudo iw dev wlo1 set power_save off where wlo1 should be your wifi device id
I'm a new user not expert in any way. I had a problem with my card when installing Linux Mint 20.4 then again when experimenting with a fresh install of Ubuntu 20.4
Also, when searching "Additional Drivers" nothing appeared for this device.
I found the following on line (I think it was "Ask Ubuntu"!?)
- Connect to internet (I used an android phone with usb tethering)
- Open Terminal Ctrl+Alt+T then copy/paste one line at a time:
sudo apt update
sudo apt install build-essential git dkms
git clone
cd rtl8821CU
chmod +x dkms-install.sh
sudo ./dkms-install.sh
sudo modprobe 8821cuWireless icon appeared, enabled my phone as a Hotspot, system requested the password, connected immediately with good speed.
I encountered the same problem after installing Ubuntu 20.04 on my Lenovo IdeaPad. Issuing the command iw list, I found some of the 5GHz frequencies are disabled by the Realtek 8821CE driver and some other channels are not. The old 5G channel I used was 5560MHz (channel-112) and it is one of the disabled channels. I then changed my wifi router's 5G setting to use another channel that is not disabled and now I can connect to my 5G wifi without problem.
See this site () for details if you want.
Hope this helps!
