Shortened list of current results:
- motherboard (fm2a68m-dg3+) produces sound from the rear, green "front" line-out when navigating UEFI setup, but LinuxMint 20 and 20.1 Cinnamon are silent (same problem with the "live" installation versions of both 20 and 20.1 when booting off a USB thumb drive)
- the "pavucontrol" volume control tab properly recognizes when the line is plugged in or unplugged and mute is off ("Built-in Audio Analog Stereo"); "alsamixer" is also fully un-muted with volume up for every channel ("HD-Audio Generic" & "Realtek ALC662 rev1")
- I've deleted the contents of user/.config/pulse many times (usually with restarts and once with "pulseaudio -k"), force reloaded alsa two or three times (with restarts), reinstalled alsa and pulseaudio (again with restart)
- I test the sound after every change with "test sound" in Mint's Sound Settings and by using Youtube in restarted sessions of Firefox
lspci -v | grep -i audio
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00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller (rev 01)
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**** List of PLAYBACK Hardware Devices ****
card 0: Generic [HD-Audio Generic], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
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1 sink(s) available.
* index: 0
name: <alsa_output.pci-0000_00_14.2.analog-stereo>
driver: <module-alsa-card.c>
flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: RUNNING
suspend cause: (none)
priority: 9039
volume: front-left: 32846 / 50% / -18.00 dB, front-right: 32846 / 50% / -18.00 dB
balance 0.00
base volume: 65536 / 100% / 0.00 dB
volume steps: 65537
muted: no
current latency: 15.88 ms
max request: 2 KiB
max rewind: 2 KiB
monitor source: 0
sample spec: s16le 2ch 44100Hz
channel map: front-left,front-right
Stereo
used by: 3
linked by: 4
configured latency: 16.00 ms; range is 16.00 .. 371.52 ms
card: 0 <alsa_card.pci-0000_00_14.2>
module: 7
properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "ALC662 rev1 Analog"
alsa.id = "ALC662 rev1 Analog"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "HD-Audio Generic"
alsa.long_card_name = "HD-Audio Generic at 0xfeb40000 irq 16"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:00:14.2"
sysfs.path = "/devices/pci0000:00/0000:00:14.2/sound/card0"
device.bus = "pci"
device.vendor.id = "1022"
device.vendor.name = "Advanced Micro Devices, Inc. [AMD]"
device.product.id = "780d"
device.product.name = "FCH Azalia Controller"
device.form_factor = "internal"
device.string = "front:0"
device.buffering.buffer_size = "65536"
device.buffering.fragment_size = "32768"
device.access_mode = "mmap+timer"
device.profile.name = "analog-stereo"
device.profile.description = "Analog Stereo"
device.description = "Built-in Audio Analog Stereo"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
ports:
analog-output-lineout: Line Out (priority 9000, latency offset 0 usec, available: yes)
properties:
active port: <analog-output-lineout>
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System:
Kernel: 5.4.0-73-generic x86_64 bits: 64 compiler: gcc v: 9.3.0
Desktop: Cinnamon 4.8.6 Distro: Linux Mint 20.1 Ulyssa
base: Ubuntu 20.04 focal
Machine:
Type: Desktop Mobo: ASRock model: FM2A68M-DG3+ serial: <filter>
UEFI: American Megatrends v: P5.20 date: 02/18/2019
CPU:
Topology: Quad Core model: AMD A10-5800K APU with Radeon HD Graphics
bits: 64 type: MCP arch: Piledriver rev: 1 L2 cache: 2048 KiB
flags: avx lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
bogomips: 30347
Speed: 1533 MHz min/max: 1400/3800 MHz Core speeds (MHz): 1: 1397 2: 1397
3: 1471 4: 1598
Graphics:
Device-1: AMD Trinity [Radeon HD 7660D] vendor: ASRock driver: radeon
v: kernel bus ID: 00:01.0
Display: x11 server: X.Org 1.20.9 driver: ati,radeon
unloaded: fbdev,modesetting,vesa resolution: 1920x1080~60Hz
OpenGL: renderer: AMD ARUBA (DRM 2.50.0 / 5.4.0-73-generic LLVM 11.0.0)
v: 4.3 Mesa 20.2.6 direct render: Yes
Audio:
Device-1: AMD FCH Azalia vendor: ASRock driver: snd_hda_intel v: kernel
bus ID: 00:14.2
Sound Server: ALSA v: k5.4.0-73-generic
Network:
Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
vendor: ASRock driver: r8169 v: kernel port: e000 bus ID: 01:00.0
IF: enp1s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives:
Local Storage: total: 465.76 GiB used: 15.63 GiB (3.4%)
ID-1: /dev/sda vendor: Samsung model: SSD 850 EVO 500GB size: 465.76 GiB
Partition:
ID-1: / size: 27.47 GiB used: 8.34 GiB (30.4%) fs: ext4 dev: /dev/sda2
ID-2: /home size: 429.57 GiB used: 7.29 GiB (1.7%) fs: ext4 dev: /dev/sda3
Sensors:
System Temperatures: cpu: 6.4 C mobo: N/A gpu: radeon temp: 6 C
Fan Speeds (RPM): N/A
Info:
Processes: 206 Uptime: 6h 06m Memory: 6.75 GiB used: 3.28 GiB (48.5%)
Init: systemd runlevel: 5 Compilers: gcc: 9.3.0 Shell: bash v: 5.0.17
inxi: 3.0.38