mirror of https://github.com/brektrou/rtl8821CU
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78 lines
2.2 KiB
Markdown
78 lines
2.2 KiB
Markdown
# Realtek RTL8811CU/RTL8821CU USB wifi adapter driver version 5.4.1 for Linux 4.4.x up to 5.2.x
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Before build this driver make sure `make`, `gcc`, `linux-header` and `git` have been installed.
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## First, clone this repository
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```
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mkdir -p ~/build
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cd ~/build
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git clone https://github.com/brektrou/rtl8821CU.git
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```
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## Build and install with DKMS
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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.
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### Debian/Ubuntu:
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```
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sudo apt-get install dkms
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```
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### Arch Linux/Manjaro:
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```
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sudo pacman -S dkms
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```
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To make use of the **DKMS** feature with this project, just run:
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```
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./dkms-install.sh
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```
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If you later on want to remove it, run:
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```
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./dkms-remove.sh
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```
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### Plug your USB-wifi-adapter into your PC
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If wifi can be detected, congratulations.
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If not, maybe you need to switch your device usb mode by the following steps in terminal:
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1. find your usb-wifi-adapter device ID, like "0bda:1a2b", by type:
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```
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lsusb
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```
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2. switch the mode by type: (the device ID must be yours.)
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Need install `usb_modeswitch` (Archlinux: `sudo pacman -S usb_modeswitch`)
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```
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sudo usb_modeswitch -KW -v 0bda -p 1a2b
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```
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It should work.
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## Build and install without DKMS
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Use following commands:
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```
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cd ~/build/rtl8821CU
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make
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sudo make install
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```
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If you later on want to remove it, do the following:
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```
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cd ~/build/rtl8821CU
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sudo make uninstall
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```
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## Checking installed driver
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If you successfully install the driver, the driver is installed on `/lib/modules/<linux version>/kernel/drivers/net/wireless/realtek/rtl8821cu`. Check the driver with the `ls` command:
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```
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ls /lib/modules/$(uname -r)/kernel/drivers/net/wireless/realtek/rtl8821cu
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```
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Make sure `8821cu.ko` file present on that directory
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### Check with **DKMS** (if installing via **DKMS**):
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``
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sudo dkms status
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``
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### ARM architecture tweak for this driver (this solves compilation problem of this driver):
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```
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sudo cp /lib/modules/$(uname -r)/build/arch/arm/Makefile /lib/modules/$(uname -r)/build/arch/arm/Makefile.$(date +%Y%m%d%H%M)
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sudo sed -i 's/-msoft-float//' /lib/modules/$(uname -r)/build/arch/arm/Makefile
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sudo ln -s /lib/modules/$(uname -r)/build/arch/arm /lib/modules/$(uname -r)/build/arch/armv7l
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```
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