Here's the system details:
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CODENAME=ulyssa
EDITION="Cinnamon"
DESCRIPTION="Linux Mint 20.1 Ulyssa"
Kernel: 5.4.0-74-generic
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pactl list sinks
Sink #0
State: SUSPENDED
Name: alsa_output.usb-BEHRINGER_UMC202HD_192k-00.analog-stereo
Description: UMC202HD 192k Analog Stereo
Driver: module-alsa-card.c
Sample Specification: s16le 2ch 48000Hz
Channel Map: front-left,front-right
Owner Module: 7
Mute: no
Volume: front-left: 20963 / 32% / -29.70 dB, front-right: 20963 / 32% / -29.70 dB
balance 0.00
Base Volume: 65536 / 100% / 0.00 dB
Monitor Source: alsa_output.usb-BEHRINGER_UMC202HD_192k-00.analog-stereo.monitor
Latency: 0 usec, configured 0 usec
Flags: HARDWARE DECIBEL_VOLUME LATENCY
Properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "USB Audio"
alsa.id = "USB Audio"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "2"
alsa.card_name = "UMC202HD 192k"
alsa.long_card_name = "BEHRINGER UMC202HD 192k at usb-0000:3c:00.0-1.2.3, high speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:3c:00.0-usb-0:1.2.3:1.0"
sysfs.path = "/devices/pci0000:00/0000:00:1c.4/0000:04:00.0/0000:05:02.0/0000:3c:00.0/usb3/3-1/3-1.2/3-1.2.3/3-1.2.3:1.0/sound/card2"
udev.id = "usb-BEHRINGER_UMC202HD_192k-00"
device.bus = "usb"
device.vendor.id = "1397"
device.vendor.name = "BEHRINGER International GmbH"
device.product.id = "0507"
device.product.name = "UMC202HD 192k"
device.serial = "BEHRINGER_UMC202HD_192k"
device.string = "front:2"
device.buffering.buffer_size = "17632"
device.buffering.fragment_size = "4408"
device.access_mode = "mmap"
device.profile.name = "analog-stereo"
device.profile.description = "Analog Stereo"
device.description = "UMC202HD 192k Analog Stereo"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-usb"
Ports:
analog-output: Analog Output (priority: 9900)
Active Port: analog-output
Formats:
pcm
I've tried setting the /proc power control:
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cat /sys/bus/usb/devices/usb3/power/control
on
as well as creating UDEV rules for this:
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cat /etc/udev/rules.d/70-usb-power.rules
ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="1397", ATTR{idProduct}=="0507", TEST=="power/control", ATTR{power/control}="on"
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cat /sys/module/usbcore/parameters/autosuspend
-1
----------------------------------------------------------------------------------------
I kept thinking this is related to usb power suspension, but it may be related to some kind of stream lock - as it seems to occur regularly whenever the audio stream application source changes. At this point, I feel like I'm kinda at a loss, and would appreciate any insights into how I could resolve this annoying issue. Thanks in advance.