0ff35915ed31a2ae4ae2b50f22fe87e67f1f8101
Cheap Savitech chip firmware stalls on rapid SET_INTERFACE / sample-rate renegotiation, eventually dropping off the USB bus and requiring a physical replug. Two fixes, both scoped to this exact device only: - snd_usb_audio quirk_flags (262a:10aa): fixed_rate + ctl_msg_delay + iface_delay, applied via /etc/modprobe.d during bootstrap. - WirePlumber: disable idle-suspend for the device's ALSA node so PipeWire doesn't repeatedly reopen the stream during normal use.
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