As that's an unacceptable state of affairs, I present to you: https://github.com/geoffreybennett/scar ... v5.15.12s1
In alsamixer you should find the setting nearby "Sync Status". Don't forget that alsamixer wants you to press "M" to toggle any playback switch controls (like this one).This release adds support for enabling/disabling the "standalone" mode of the Gen 2/3 Scarlett interfaces which have internal mixers (4i4 and above). When standalone mode is enabled, the interface will continue to pass audio even if not connected to a USB host.
If you can test, please do. Not just this new feature, but make sure I didn't break anything else as I refactored things. Once I get a couple of thumbs up then I'll submit it for inclusion in mainline.