Bluetooth unable to see devices

[pecosk]

Device info (please complete the following information)

• Device: PinePhone
• Kernel Version : 6.12.1-2-megi-danctnix
• UI: sxmo

Describe the bug
After recent update, bluetooth is not able to see any devices (bluetoothctl scan on does nothing, i've tried also GUI based tools to configure bluetooth, without success). Bluetooth is switched on, i did not see any relevant errors, just searching does nothing.

after investigating, i've noticed that rtl8723bt-firmware package was moved to dummy and now the drivers such as rtl8723cs_xx_config.bin are now used directly from upstream linux-firmware. After searching for the original source, i've found that it was used from megous.com and tried replacing the contents of /usr/lib/firmware/rtl_bt with their version. This worked and now i can see and connect bluetooth devices.
I am not sure which files are really relevant, why it does not work using current linux-firmware package (20241210.b00a7f7e-1) and if this is the right place to report it, or i should go somewhere else so that other people don't have the same issue and it is fixed in proper way.
thx for your work

To Reproduce
Steps to reproduce the behavior:

1. in any kind of terminal open bluetoothctl
2. scan on
3. .. nothing happens

Expected behavior
a list of nearby devices should appear

[Danct12]

I've been trying to get in contact with megous about this, but he is unreachable during the holidays.

[jakub-bidzan]

I can confirm having the same issue on my pinephone and a friend of mine on his too. Nothing appears in device list or btctl

[anarsoul]

You need https://gitlab.com/kernel-firmware/linux-firmware/-/merge_requests/398 to fix 8723cs bluetooth

[pecosk]

that sounds promising, i'll check when it gets to archlinuxarm package repo, currently there is still the version from Dec 10th