Rtl wifi driver linux
Realtek RTL8821CE Driver
This repository hosts the code for the Arch Linux AUR Package. It’s targeting Linux > 4.14 and is being developed for Arch Linux and Ubuntu 18.10. No support will be provided for other Linux distributions or Linux Kernel versions outside of that range.
The maintainers of this repository are not Realtek employees and are maintaining this repository for their own usage. Further feature development (such as proper power saving, etc.) will not be pursued here, but will be gladly integrated if newer driver sources are provided by Realtek. Use at your own risk.
This driver can be installed using DKMS. This is a system which will automatically recompile and install a kernel module when a new kernel gets installed or updated. To make use of DKMS, install the dkms package.
Installation of Driver
Make sure you have a proper build environment and dkms installed.
The following steps are required prior to building the driver on Ubuntu/Debian:
Ubuntu users may also install the prebuilt rtl8821ce-dkms package, an older version of the driver maintained by the Ubuntu MOTU Developers group for bionic, eoan and focal. It has been known to work in cases where the newer driver available here does not. Bugs and issues with that package should be reported at Launchpad rather than here.
Make sure you have the base-devel package group installed before you proceed for the necessary compilation tools.
Installing from AUR
Dependencies for manual installation on Arch Linux
If you are running a non-vanilla kernel then install the headers to match the kernel package. Proceed to the section below.
An unofficial Gentoo package is available, using this repository as upstream. It is available from the trolltoo overlay. Gentoo does not use or require dkms for packaged drivers.
Manual installation of driver
In order to install the driver open a terminal in the directory with the source code and execute the following command:
Removal of Driver
Open a terminal window and git clone the repository to your local disk
Then run the installation script:
Remove the driver:
Make sure you have your local copy of this repository fully updated:
Clean any stale binaries:
When reporting issues, please make sure that debugging is enabled. To enable debugging either set MAKEFLAGS=»CONFIG_RTW_DEBUG = y» before compilation or edit Makefile:
This will enable verbose debug logging, helpful to developers.
PCIe Activate State Power Management
Your distribution may come with PCIe Active State Power Management enabled by default. That may conflict with this driver. To disable:
Add pci=noaer at the end of GRUB_CMDLINE_LINUX_DEFAULT. Line should look like this:
Then update your GRUB configuration:
Lenovo Yoga laptops
Some new Yoga laptops (like the Yoga 530) come with rtl8821ce as the Wi-Fi/Bluetooth chip. But the ideapad-laptop module, which may come included in your distribution, may conflict with this driver. To disable:
BlueTooth is not working
This may be due to the Kernel loading up the wrong firmware file for this card. Please take a look at @wahsot’s tutorial at https://github.com/tomaspinho/rtl8821ce/issues/19#issuecomment-452196840 to see if that helps you out.
If your system uses Secure Boot, disable it via BIOS settings, otherwise the kernel will not accept user-supplied modules.
Unstable connection — slowdowns or dropouts
The problem may be due to the periodic scanning of access points by the network applet.
This fix worked helpful on Pop! _OS/Ubuntu 20.10 and Fedora 33. Both with GNOME and NetworkManager. #179
Set the BSSID from your network applet. In GNOME this can be done in WiFi Settings > Your profile > Identity > BSSID .
We are going to disable the Connectivity Check option in NetworkManager. This by editing the file in /var/lib/NetworkManager/NetworkManager-intern.conf and adding the following instructions at the end:
Then, just reboot or restart the NetworkManager unit to fix the problem.
Wi-Fi not working for kernel >= 5.9
The Linux Kernel 5.9 version comes with a broken rtw88 module developed by Realtek that has poor compatibility with most revision of the 8821ce chip.
You must disable it by adding the following to your module blacklists ( /etc/modprobe.d/blacklist.conf ):
Then, make sure you have the rtl8821ce module correctly installed.
Turn off your computer, wait a few seconds (to force firmware reload) and then turn it on again.
Wi-Fi and Bluetooth don’t work after suspend
This is a bug that won’t be fixed until/if Realtek implements proper power management themselves. Given they are now only working in rtw88 , this driver will most likely never be fixed in this regard. Please avoid opening issues about this.
Monitor (promiscuous) mode doesn’t work
This driver doesn’t support it and never will. Please avoid opening issues about this.
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Rtl wifi driver linux
Realtek RTL8811CU/RTL8821CU USB wifi adapter driver version 5.4.1 for Linux 4.4.x up to 5.x
Before build this driver make sure make , gcc , linux-header / kernel-devel , bc and git have been installed.
First, clone this repository
Check the name of the interface
Check the interface name of your wifi adapter using ifconfig . Usually, it will be wlan0 by default, but it may vary depends on the kernel and your device. On Ubuntu, for example, it may be named as wlx + MAC address. (https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/)
If this is the case, you can either disable the feature following the link above, or replace the name used in the driver by
Build and install with DKMS
DKMS is a system which will automatically recompile and install a kernel module when a new kernel gets installed or updated. To make use of DKMS, install the dkms package.
To make use of the DKMS feature with this project, just run:
If you later on want to remove it, run:
Plug your USB-wifi-adapter into your PC
If wifi can be detected, congratulations. If not, maybe you need to switch your device usb mode by the following steps in terminal:
- find your usb-wifi-adapter device ID, like «0bda:1a2b», by type:
- switch the mode by type: (the device ID must be yours.)
Need install usb_modeswitch (Archlinux: sudo pacman -S usb_modeswitch )
Make it permanent
If steps above worked fine and in order to avoid periodically having to make usb_modeswitch you can make it permanent (Working in Ubuntu 18.04 LTS):
Edit usb_modeswitch rules:
Append before the end line LABEL=»modeswitch_rules_end» the following:
Make sure to set your ATTR
then your configuration in /lib/udev/rules.d/40-usb_modeswitch.rules should be
Build and install without DKMS
Use following commands:
If you later on want to remove it, do the following:
Checking installed driver
If you successfully install the driver, the driver is installed on /lib/modules/
/kernel/drivers/net/wireless/realtek/rtl8821cu . Check the driver with the ls command:
Make sure 8821cu.ko file present on that directory
Check with DKMS (if installing via DKMS):
sudo dkms status
ARM architecture tweak for this driver (this solves compilation problem of this driver):
Use the tool ‘iw’, please don’t use other tools like ‘airmon-ng’
About
Realtek RTL8811CU/RTL8821CU USB Wi-Fi adapter driver for Linux
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Rtl wifi driver linux
News: A new version of this driver is now available. Testing has shown it to be a solid driver. The driver located here will be discontinued in the near future so please transition to the new driver as you are able to do so.
Linux Driver for USB WiFi Adapters that are based on the RTL8812AU Chipset
- v5.9.3.2 (Realtek) (2020-10-12)
- Plus updates from the Linux community
- IEEE 802.11 b/g/n/ac WiFi compliant
- 802.1x, WEP, WPA TKIP and WPA2 AES/Mixed mode for PSK and TLS (Radius)
- IEEE 802.11b/g/n/ac Client mode
- Support wireless security for WEP, WPA TKIP and WPA2 AES PSK
- Support site survey scan and manual connect
- Support power saving mode
- Supported interface modes:
- IBSS
- Managed
- AP (see Bridged Wireless Access Point located in the main directory of this repo)
- Monitor
- P2P-client
- P2P-GO
- USB mode control
- Log level control
- LED control
- Power saving control
- VHT control (allows 80 MHz channel width in AP mode)
- SU Beamformee and MU Beamformee control
- SU Beamformer control
A FAQ is available at the end of this document.
- Kernels: 2.6.24 — 5.8 (Realtek)
- Kernels: 5.9 — 5.13 (community support)
Tested Linux Distributions
Arch Linux (kernel 5.4)
Arch Linux (kernel 5.9)
Fedora (kernel 5.11)
Kali Linux (kernel 5.10)
Linux Mint 20.2 (Linux Mint based on Ubuntu) (kernel 5.4)
Linux Mint 20 (Linux Mint based on Ubuntu) (kernel 5.4)
LMDE 4 (Linux Mint based on Debian) (kernel 4.19)
Manjaro 20.1 (kernel 5.9)
Raspberry Pi OS (2021-01-11) (ARM 32 bit) (kernel 5.10)
Raspberry Pi Desktop (x86 32 bit) (kernel 4.9)
Ubuntu 21.04 (kernel 5.11)
Ubuntu 20.10 (kernel 5.8)
Ubuntu 20.04 (kernel 5.4)
Ubuntu 18.04 (kernel 5.4)
Download Locations for Tested Linux Distributions
- Alfa AWUS036AC
- Alfa AWUS036ACH
- Belkin F9L1109
- Buffalo — WI-U3-866D
- D-Link DWA-182 (Rev. C1)
- Edimax EW-7822UAC
- Linksys WUSB6300 V1
- Rosewill RNX-AC1200UBE
- TRENDnet TEW-805UB
- Numerous products that are based on the supported chipset.
Warning: Beware of «multi-state» USB WiFi adapters. Some USB WiFi adapters have proprietary Windows drivers onboard. When plugged in, they act like a flash drive or CDROM and on Windows will attempt to start installing the Windows driver. That won’t work on Linux or MAC or any other non-Windows OS so the adapter sits there in flash drive or CDROM mode. The problem is that the state of the adapter has to be changed for the adapter to show up as the device that you expect, in this case, a WiFi adapter. Most modern Linux distributions ship with a utility called «usb-modeswitch» that will handle this issue for you if it has the correct information for your adapter. It is a good utility but if you buy adapters that are «multi-state,» that is one more potential headache you may have to deal with when something goes wrong. Often you can indentify adapters that are «multi-state» as they are advertised as «free driver» or «free installation driver.» If you are looking to buy a USB WiFi adapter for use on Linux, MAC OS, *NIX or anything besides Windows, it is a good idea to seek out single-state adapters.
Note: Some adapter makers change the chipsets in their products while keeping the same model number so please check to confirm that the product you plan to buy has the chipset you are expecting.
The installation instructions are for the novice user. Experienced users are welcome to alter the installation to meet their needs.
Temporary internet access is required for installation. There are numerous ways to enable temporary internet access depending on your hardware and situation. One method is to use tethering from a phone. Another method to enable temporary internet access is to keep a wifi adapter that uses an in-kernel driver in your toolkit.
You will need to use the terminal interface. The quick way to open a terminal: Ctrl+Alt+T (hold down on the Ctrl and Alt keys then press the T key)
DKMS is used for the installation. DKMS is a system utility which will automatically recompile and install this driver when a new kernel is installed. DKMS is provided by and maintained by Dell.
It is recommended that you do not delete the driver directory after installation as the directory contains information and scripts that you may need in the future.
There is no need to disable Secure Mode to install this driver. If Secure Mode is properly setup on your system, this installation will support it.
Step 1: Open a terminal (Ctrl+Alt+T)
Step 2: Update the system (select the option for the OS you are using)
Step 3: Install the required packages (select the option for the OS you are using)
Step 4: Create a directory to hold the downloaded driver
Step 5: Move to the newly created directory
Step 6: Download the driver
Step 7: Move to the newly created driver directory
Step 8: Warning: this step only applies if you are installing to Raspberry Pi hardware.
Run a preparation script
Step 9: Run the installation script (For automated builds, use NoPrompt as an option)
A file called 8812au.conf will be installed in /etc/modeprobe.d by default.
This file will be read and applied to the driver on each system boot.
To edit the driver options file, run the edit-options.sh script.
Documentation for Driver Options is included in the file 8812au.conf .
Removal of the Driver
Note: This script should be used in the following situations:
- the driver is no longer needed
- a fresh start with default settings is needed
- a new version of the driver needs to be installed
- a major operating system upgrade is going to be applied
Note: This script removes everything that has been installed, with the exception of the packages installed in Step 3 and the driver directory. The driver directory can and probably should be deleted in most cases after running the script.
Step 1: Open a terminal (Ctrl+Alt+T)
Step 2: Move to the driver directory
Step 3: Run the removal script
Recommended WiFi Router/ Access Point Settings
Note: These are general recommendations, some of which may not apply to your specific situation.
Security: Set WPA2-AES. Do not set WPA2 mixed mode or WPA or TKIP.
Channel width for 2.4G: Set 20 MHz fixed width. Do not use 40 MHz or 20/40 automatic.
Channels for 2.4G: Set channel 1 or 6 or 11 depending on the congestion at your location. Do not set automatic channel selection.
Mode for 2.4G: For best performance, set «N only» if you no longer use B or G capable devices.
Network names: Do not set the 2.4G Network and the 5G Network to the same name. Note: Unfortunately many routers come with both networks set to the same name.
Channels for 5G: Not all devices are capable of using DFS channels. It may be necessary to set a fixed channel in the range of 36 to 48 or 149 to 161 in order for all of your devices to work on 5g. (for US, other countries may vary)
Best location for the wifi router/ access point: Near center of apartment or house, at least a couple of feet away from walls, in an elevated location.
Check congestion: There are apps available for smart phones that allow you to check the congestion levels on wifi channels. The apps generally go by the name of WiFi Analyzer or something similar.
After making and saving changes, reboot the router.
Set regulatory domain to correct setting in OS
Check the current setting
If you get 00, that is the default and may not provide optimal performance.
Set it temporarily
Note: Substitute your country code if you are not in the United States.
Set it permanently
Recommendations regarding USB
Moving your USB WiFi adapter to a different USB port has been known to fix a variety of problems. Problems include WiFi going on and off as well as connections coming and going.
If connecting your USB WiFi adapter to a desktop computer, use the USB ports on the rear of the computer. Why? The ports on the rear are directly connected to the motherboard which will reduce problems with interference and disconnection that can happen with front ports that use cables.
If your USB WiFi adapter is USB 3 capable then plug it into a USB 3 port.
Avoid USB 3.1 Gen 2 ports if possible as almost all currently available adapters have been tested with USB 3.1 Gen 1 (aka USB 3) and not with USB 3.1 Gen 2.
If you use an extension cable and your adapter is USB 3 capable, the cable needs to be USB 3 capable.
Some USB WiFi adapters require considerable electrical current and push the capabilities of the power available via USB port. One example is devices that use the Realtek 8814au chipset. Using a powered multiport USB extension can be a good idea in cases like this.
How to disable onboard WiFi on Raspberry Pi 3B, 3B+, 3A+, 4B and Zero W.
Add the following line to /boot/config.txt
How to forget a saved WiFi network on a Raspberry Pi
Delete the relevant WiFi network block (including the ‘network=’ and opening/closing braces.
Press ctrl-x followed by ‘y’ and enter to save the file.
Question: Does WPA3 work with this driver?
Answer: No, WPA3 does not work with this driver. If you need an AC class adapter that does support WPA3, I suggest an Alfa AWUS036ACM (mt7612u chipset) but there are other adapters based on the mt7612u chipset available at various price points. Be aware that WPA3 support is not fully in place in all Linux distros currently. More than driver support is required for WPA3 support. You can get more information and links at the following site:
Question: What interface combinations does this driver support?
Answer: None. Realtek out-of-kernel drivers, including this driver, do not support interface combinations. If you need support for interface combinations, I suggest adapters based on the Mediatek chipsets. You can get more information and links at the following site:
Question: What extended features does this driver support?
Answer: None. For extended features, you need an adapter that uses Mediatek or Atheros drivers. You can get more information and links at the following site:
Question: I bought two rtl88x2bu adapters and am planning to run one of them as an AP and another as a WiFi client. How do I set that up?
Answer: You can’t. Realtek drivers do not support more than one adapter with the same chipset in the same computer. However, testing has shown that the Mediatek drivers do support more than one adapter with the same chipset in the same computer. I recommend adapters with the mt7612u chipset if you are looking for AC 1200+ adapters. You can get more information and links at the following site:
Question: Why do you recommend Mediatek based adapters when you maintain this repo for a Realtek driver?
Answer: Many Linux users already have adapters based on Realtek chipsets. This repo is for Linux users to support their existing adapters but my STRONG recommendation is for Linux users to seek out WiFi solutions based on Mediatek, Intel or Atheros chipsets and drivers. If users are looking at a USB solution, Mediatek and Atheros based adapters are the best solution. If users want a PCIe, mPCIe, SDIO or other implementation then Intel, Mediatek or Atheros are good solutions. Realtek based USB adapters are not a good solution because Realtek does not follow Linux Wireless standards for USB WiFi adapters. Realtek drivers are problematic in many ways. You have been WARNED. For information about usb wifi adapters:
About
Linux Driver for USB WiFi Adapters that are based on the RTL8812AU Chipset
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