RTLBTFW(8)

💙 rtlbtfw(8) — like, the whole manual, bestie

okay so real quick: this is rtlbtfw(8), from the System Manager's Manual section, and it's literally the little utility that shoves firmware into your Realtek Bluetooth dongle so it actually works. let's get into it 🫶

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✨ NAME ✨

rtlbtfw — load firmware for Realtek 87XX/88XX Bluetooth USB devices 💅

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🎀 SYNOPSIS 🎀

rtlbtfw -d device_name -f firmware_path
rtlbtfw -h

like, that's the whole vibe. two ways to run it, that's it ✨

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🌸 DESCRIPTION 🌸

okay so the tea: the rtlbtfw utility downloads the specified firmware file to the specified ugen(4) device. that's the job. that's the whole job. 🦋

highkey important: this utility will only work with Realtek 87XX/88XX chip based Bluetooth USB devices and some of their successors. don't come at it with random hardware, it will not slay for you 😭

the identification is currently based on the USB vendor ID/product ID pair and the interface class. for Realtek devices the vendor ID should be 0x0bda (USB_VENDOR_REALTEK), and the 0-th interface class/subclass/protocol should be a Bluetooth RF Wireless Controller 👑

non-Realtek devices are identified based on the USB vendor ID/product ID pair. that's the vibe check for the impostors 💀

Firmware files are available in the comms/rtlbt-firmware port. go get 'em 📦

and here's the cute part — the rtlbtfw utility will query the device to determine which firmware image and board configuration to load at runtime. so it asks the hardware what it wants. main character energy, honestly. it doesn't just guess 🌈

the options are as follows:

• -D — enable verbose debugging. like, tell me everything 🔍
• -d device_name — specify ugen(4) device name. which dongle are we talking to, bestie? 🔌
• -I — enable informational debugging. the chiller, chattier debug level 💬
• -f firmware_path — specify the directory containing the firmware files to search and upload. this is where the firmware lives 📁
• -h — display usage message and exit. the classic "help me" move 🙈

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⭐ EXIT STATUS ⭐

the rtlbtfw utility exits 0 on success, and >0 if an error occurs. no cap, that's it. if it's not zero, something went sideways 😭

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🦋 SEE ALSO 🦋

libusb(3), ng_ubt(4), ugen(4), devd(8)

go read those too, iykyk 📚✨

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👑 AUTHORS 👑

rtlbtfw is based on the ath3kfw(8) utility used as firmware downloader template, and on Linux btrtl driver source code. it is written by Vladimir Kondratyev <wulf@FreeBSD.org> under sponsorship from Future Crew LLC. iconic behavior, we stan 🫶💖

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💀 BUGS 💀

Most likely. Please report if found.

(not me quoting the manpage verbatim there — it's just that funny 😭 please actually report them though fr fr)

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friendly reminder bestie: if your device isn't a Realtek 87XX/88XX (or one of the successors), this tool is not gonna work, and that's not a bug, that's just the rules 🎀

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and that's the whole page!! brought to you by the Debian build, dated July 15, 2025, RTLBTFW(8) — go flash something, slay, and remember: -h is your friend 💅✨🌸