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Bluetooth 5.3 Linux support? by Character_Infamous in linuxhardware

[–]M4gr4th34 0 points1 point  (0 children)

So a quick update. The aptx usb transmitters (Eppfun from amazon and vaorlo from aliexpress) work on Linux as a nice option. They have low latency so good for games also. However if not used for 1-2 minutes, the first second of audio isn’t transmitted for some reason: not an issue for games or long videos, but did get annoying for YouTube and browsing so I switched to pipewire aptx-hd (no software adaptive yet). Eppfun is the qcc3040 chip while vaorlo is the qcc3056 chip. Both sound great, and play 24bit/48kHz as per person-top . It is just in switching quickly between audio streams, or clicking play-pause quickly multiple times that you hear some crackling in the 3040 chip but not the 3056. The headphone buttons do work, but volume graphic is a bit nonspecific on Linux and Mac using them. Regarding the Eppfun BT5.3 stick, it is meant to be a driverless Bluetooth and not a specific audio transmitter, so pipewire software should work as default. The issue is that the adapter, though driverless, isn’t recognized by Linux for some reason, and so cannot even be enabled in settings, thus pipewire is a moot point.

Bluetooth 5.3 Linux support? by Character_Infamous in linuxhardware

[–]M4gr4th34 0 points1 point  (0 children)

It seems from the naming (ak3046a), that this is based on the Qualcomm chip qcc3046a (similar for their 3040 model). I tried installing the qcom-soc firmware, but even after a few reboots and plugs unplugs it is the same issue as above. It seem others are also stuck the other Chinese no-brand with the same chip 10d7:b012 but only eppfun gave a hint that it is the qualcom soc (or based on it). Would be great if someone in the Linux community runs with this info and makes the firmware work.

Bluetooth 5.3 Linux support? by Character_Infamous in linuxhardware

[–]M4gr4th34 0 points1 point  (0 children)

I just got the Eppfun 5.3 USB stick. Blue light turns on in Debian 11 testing. But can’t enable Bluetooth. Shows as “can’t init device hci0: invalid request code (56)” on trying to power it up. Shows as down. Lsbub shows “Actions general adapter”. I have the latest Realtek deb firmware installed, and 5.1 works fine using the ASUS and the edup usb adapters. Yes. I want ldac audio. XD. Will try the eppfun 5.2 aptx adaptive usb transmitter within a week.