Mercusys wifi adapter drivers not working

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I have a mercusys ac650 wifi adapter, but any drivers I’ve tried installing don’t work. Pretty much all posts I found with related issues were for ubuntu, and I tried doing what they say, but it doesn’t seem to work.

Bus 006 Device 002: ID 13fe:5500 Kingston Technology Company Inc. Flash drive
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 003: ID 045e:00f5 Microsoft Corp. LifeCam VX-3000
Bus 005 Device 005: ID 0bda:c811 Realtek Semiconductor Corp. 802.11ac NIC
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 12d1:108a Huawei Technologies Co., Ltd. HRY-LX1
Bus 001 Device 002: ID 046d:c52f Logitech, Inc. Unifying Receiver
Bus 001 Device 004: ID 1a2c:0e24 China Resource Semico Co., Ltd USB Keyboard
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

the adapter is the realtek semiconductor thing
secure boot is off

2

When you have an unsupported piece of hardware, it is advisable to pay a visit to linux-hardware.org, and see what other use: https://linux-hardware.org/index.php?id=usb:0bda-c811

It seems the rtl8821cu driver is needed, have you tried installing rtl8821cu-dkms-git from AUR?

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