[arch-general] nvidia causing audio glitches

I've had this problem ever since I got this laptop[1]: I get audio glitches with both pulseaudio and pipewire, through *all* audio sinks (built-in, USB soundcard, bluetooth). It seems to become more severe after a suspend/resume cycle. I've discovered that the symptoms go away completely if I set the discrete NVIDIA graphics card PowerMizer setting to "Preferred Mode: Prefer Maximum Performance". So it seems there's something about the hardware's low-power behaviour that causes this. Has anyone else experienced this? Does anyone have a clearer understanding of the cause? Is this something we can take to NVIDIA with any realistic hope of a fix? Paul [1] Dell Inspiron 7590, Intel Core i5-9300H, GTX 1650