Firmware rtl8761bu is missing from armbian-firmware package

[scelfo]

Creating a bug report/issue

I have searched the existing open and closed issues

Required Information

$ cat /boot/dietpi/.version
G_DIETPI_VERSION_CORE=9
G_DIETPI_VERSION_SUB=7
G_DIETPI_VERSION_RC=1
G_GITBRANCH='master'
G_GITOWNER='MichaIng'

$ echo $G_DISTRO_NAME $G_RASPBIAN
bookworm

$ uname --all
Linux bar.home 6.1.75-vendor-rk35xx #1 SMP Thu Jul 25 14:36:35 UTC 2024 aarch64 GNU/Linux

$ dpkg --print-architecture
arm64

$ echo $G_HW_MODEL_NAME
NanoPi 6 series (aarch64)

Steps to reproduce

1. Install armbian-firmware

Expected behaviour

• Error loading bluetooth drivers for my usb dongle, the following is visible with dmesg: Bluetooth: hci0: RTL: firmware file rtl_bt/rtl8761bu_fw.bin not found
• I expect to see the drivers at rtl_bt - kernel/git/firmware/linux-firmware.git - Repository of firmware blobs for use with the Linux kernel

Actual behaviour

• rtl8761bu_config.bin and rtl8761bu_fw.bin are missing

Extra details

• The bluetooth adapter had been working with earlier kernel versions, I don’t know which specific update caused it to stop working.
• If I download them directly from the kernel source tree into /usr/lib/firmware/rtl_bt then I’m able to use my usb bluetooth adapter.
• The specific bluetooth adapter is this Edimax BY-8500 from Amazon.

[Joulinar]

something @MichaIng would need to have a look into

[MichaIng]

Jep, known issue. Not yet sure how to solve best. Easiest is certainly to add a little hack to our Armbian fork, which just downloads these particular missing Realtek Bluetooth firmware blobs form Linux sources, instead of forking their firmware repository as well.

[scelfo]

Thanks for the reply! Is there a tracking issue I could follow to know when you have something in place that is expected to work? In the meantime I’ll just keep downloading the couple of firmware files as needed.