wholteza
0ff35915ed
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.
24 lines
709 B
Plaintext
24 lines
709 B
Plaintext
# The NuForce uDAC (Savitech chip) has flaky firmware: when PipeWire
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# idles and then resumes its ALSA node, the device often fails the
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# resulting SET_INTERFACE / sample-rate renegotiation with a USB stall
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# (spa.alsa: set_hw_params: Broken pipe). Enough of these in a row make
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# the device drop off the USB bus and require a physical replug.
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#
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# Keeping the node's hardware stream open (no idle-suspend) avoids the
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# repeated renegotiation and stops the crashes.
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monitor.alsa.rules = [
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{
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matches = [
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{
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node.name = "~alsa_output.usb-Nuforce_Inc\\._NuForce_USB_Audio-.*"
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}
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]
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actions = {
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update-props = {
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session.suspend-timeout-seconds = 0
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}
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}
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}
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]
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