Dennis HilkLinux diagnosticsDE

Wi-Fi adapters

Realtek RTL8822BU USB family

An upstream rtw88 USB route for the 8822B family. USB interface descriptors participate in matching, so the product pair alone is incomplete evidence.

Editorial source review: Share public profileOpen in the identification tool
On this page
  1. Overview & identity
  2. Driver & binding
  3. Firmware
  4. Read-only diagnostics
  5. Limitations & related issues
  6. References

Overview & identity

The curated USB pair is 0bda:b812. It identifies the reviewed chip/transport family, not a unique board or advertised product.

Curated identifiers
usb 0bda:b812

A numeric match establishes a candidate family within the reviewed evidence. Marketing names, board variants, subsystem conditions and successful operation remain separate questions.

Driver & binding

rtw88_8822bu is the transport candidate, not the similarly named PCI BE module. The shared 8822B implementation declares the firmware name.

  • rtw88_8822bu — kernel driver/module candidate

Detected, bound, operational: learn the difference

Firmware

Host-loaded firmware required

These are source-declared filenames or a source-backed format pattern. Select the exact request from the host log; no files were tested on hardware.

Checked examples or filename branches, not a complete installation list:

  • rtw88/rtw8822b_fw.bin

Inspect firmware packaging on your distribution

Read-only diagnostics

Run one displayed command at a time. Replace uppercase placeholders with the affected device, interface or module from your own output. Commands are never executed here. Read-only output can still contain private identifiers.

Read USB interface binding

lsusb -t

Locate the port of this adapter in the USB tree. Driver identifies an interface binding; a vendor/device pair alone does not. Reading the tree normally needs no root privileges.

Read firmware metadata

modinfo -F firmware MODULE

Replace MODULE with rtw88_8822bu or the actual candidate module in your report. Metadata lists declared filenames; it does not prove a file was loaded. This query needs no root privileges.

Read existing Wi-Fi association

iw dev INTERFACE link

Replace INTERFACE with the wireless interface from iw dev. Association and rate are observations, not a throughput or firmware test. This query normally needs no root privileges.

Limitations & related issues

The reviewed entry additionally matches interface ff/ff/ff. USB IDs can be reused by rebrands; this profile deliberately does not name a particular retail dongle.

These guides are linked for relevant observations, not as known defects of every device in this family.

Choose a hardware diagnostic workflow · Inspect a log excerpt in Fix Lab

References

Source review records a checked implementation or document, not a reproduced hardware test. Version-specific tables do not establish a minimum kernel or guaranteed operation.