Installation successful but no wifi

[FoolHen]

Hi, I have installed the driver without issues on Debian 11 Bullseye (5.10.0-30-amd64 x86_64). I have a usb stick that needs RTL8811A/RTL8821A USB drivers. However, after installing it wifi is sill not enabled. I have tried different ports but didn't make a difference.

Not sure if this issue is valid, as the driver installed correctly. The device is from an unknown brand (https://approx.es/producto/appusb600da-adaptador-usb-wifi-600mb-antena/) and they have linux drivers (software tab) but they are outdated, so I was not able to install them. However, it includes some documentation where it states that need RTL8811A/RTL8821A USB drivers.

Any recommendation on how to check whats wrong?

running lsusb -v gives me:

lsusb -v output

Bus 001 Device 005: ID 0bda:c811 Realtek Semiconductor Corp. 802.11ac NIC
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0xc811
bcdDevice 2.00
iManufacturer 1 Realtek
iProduct 2 802.11ac NIC
iSerial 3 123456
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0035
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 5
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 2
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x05 EP 5 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x06 EP 6 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x87 EP 7 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 3
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x08 EP 8 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0

[morrownr]

Hi @FoolHen

it includes some documentation where it states that need RTL8811A/RTL8821A USB drivers.

That documentation is wrong. The VID/PID ID 0bda:c811 indicates that your adapter uses the rtl8821/11cu chip so you need to clean out/remove any incorrect drivers and go to:

https://github.com/morrownr/8821cu-20210916

[FoolHen]

Thank you, that one seemed to partially work. I'm able to now see the wireless networks but unfortunately it can't connect to any network, their settings seem fine but it keeps asking for password and retrying. It's probably the adapter's fault, right?