@ Viacheslav: Can you please tell me which repo did you use when your run USB 8821cu successfully in AP mode ? >From your log bellow it seems that is not the mainline driver rtw88_8821cu. On Wed, Jan 17, 2024 at 10:49 AM Viacheslav <adeep@xxxxxxxxx> wrote: > I have USB RTL8821CU. It works in AP mode: > > [511809.841083] usb 1-1.4: New USB device found, idVendor=0bda, > idProduct=c820, bcdDevice= 2.00 > [511809.841111] usb 1-1.4: New USB device strings: Mfr=1, Product=2, > SerialNumber=3 > [511809.841118] usb 1-1.4: Product: 802.11ac NIC > [511809.841124] usb 1-1.4: Manufacturer: Realtek > [511809.841130] usb 1-1.4: SerialNumber: 123456 > [511809.973789] usbcore: registered new interface driver btusb > [511810.432057] usbcore: registered new interface driver rtl8821cu