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Using the Qudelix 5k app on Linux

Qudelix 5k is a bluetooth DAC AMP. It has an app/extension for Chrome, so you can customize settings on Windows/MacOS. If you try using it on Linux, it won’t work (device won’t be detected).

Solution

Add the following udev rules (/etc/udev/rules.d/100-qudelix-5k.rules):

SUBSYSTEM=="usb", ATTRS{idVendor}=="0a12", MODE="0660", GROUP="uucp", TAG+="uaccess"
KERNEL=="hidraw*", SUBSYSTEM=="hidraw", MODE="0660", , GROUP="uucp", TAG+="uaccess", TAG+="udev-acl"

Source

Side note

Also fixes permission issues for solaar (logitech stuff):

KERNEL=="hidraw*", MODE="0660", GROUP="uucp"