Speakers and gerenally all devices connected to my sound card (not the Bluetooth ones) are getting disable some time after booting

You have two items that you might want to start with:

You have both PulseAudio and PipeWire running, you might want to remove one. ALSA uses one of the other two, and can be left alone. Currently, Garuda uses PipeWire, but the choice is yours to make on which one to keep.

The current bios is 2604. While the updates don’t mention sound, manufacturers can be lazy and state “System stability” if it not CPU or Network.

Now, if there is still no progress, this link is for buzzing sound, but has how to disable power settings for snd_hda_intel driver.

Hope something helps here for you!

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