Yesterday's behavior: Sound works fine from built-in speakers and from headphones. At one point, I launch a Windows VM and a screensharing Zoom call at the same time; it is too much for my laptop and it crashes.
Today's behavior: I turn on my laptop and cannot hear any sound, either from the built-in speakers or from headphones. If I run pavucontrol, I see the output level monitor go up and down if I play an audio file, but can't hear anything. This does not change if I mute/unmute, change volume levels, change the 'profile', etc. System sound settings show 'Speakers' and 'Headphones' as possible outputs.
System details:
$ lspci -v
[...]
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21) (prog-if 80)
Subsystem: Dell Sunrise Point-LP HD Audio
Flags: bus master, fast devsel, latency 32, IRQ 140
Memory at d1128000 (64-bit, non-prefetchable) [size=16K]
Memory at d1100000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel, snd_soc_skl
[...]
$ echo list-sinks | pacmd
1 sink(s) available.
* index: 0
name: <alsa_output.pci-0000_00_1f.3.analog-stereo>
driver: <module-alsa-card.c>
flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 9039
volume: front-left: 58980 / 90% / -2.75 dB, front-right: 58980 / 90% / -2.75 dB
balance 0.00
base volume: 65536 / 100% / 0.00 dB
volume steps: 65537
muted: no
current latency: 0.00 ms
max request: 0 KiB
max rewind: 0 KiB
monitor source: 0
sample spec: s16le 2ch 48000Hz
channel map: front-left,front-right
Stereo
used by: 0
linked by: 0
configured latency: 0.00 ms; range is 0.50 .. 341.33 ms
card: 0 <alsa_card.pci-0000_00_1f.3>
module: 7
properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "ALC3253 Analog"
alsa.id = "ALC3253 Analog"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "HDA Intel PCH"
alsa.long_card_name = "HDA Intel PCH at 0xd1128000 irq 140"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:00:1f.3"
sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
device.bus = "pci"
device.vendor.id = "8086"
device.vendor.name = "Intel Corporation"
device.product.id = "9d71"
device.product.name = "Sunrise Point-LP HD Audio"
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"
alsa.mixer_name = "Realtek ALC3253"
alsa.components = "HDA:10ec0225,10280740,00100002"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
ports:
analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
properties:
device.icon_name = "audio-speakers"
analog-output-headphones: Headphones (priority 9000, latency offset 0 usec, available: no)
properties:
device.icon_name = "audio-headphones"
active port: <analog-output-speaker>
$ lsmod | grep snd
snd_soc_skl 86016 0
snd_soc_skl_ipc 65536 1 snd_soc_skl
snd_hda_ext_core 24576 1 snd_soc_skl
snd_soc_sst_dsp 32768 1 snd_soc_skl_ipc
snd_soc_sst_ipc 16384 1 snd_soc_skl_ipc
snd_soc_acpi 16384 1 snd_soc_skl
snd_soc_core 241664 1 snd_soc_skl
snd_compress 20480 1 snd_soc_core
snd_hda_codec_realtek 106496 1
ac97_bus 16384 1 snd_soc_core
snd_pcm_dmaengine 16384 1 snd_soc_core
snd_hda_codec_generic 73728 1 snd_hda_codec_realtek
snd_hda_intel 45056 6
snd_hda_codec 126976 3 snd_hda_codec_generic,snd_hda_intel,snd_hda_codec_realtek
snd_hda_core 81920 6 snd_hda_codec_generic,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_soc_skl
snd_hwdep 20480 1 snd_hda_codec
snd_pcm 98304 7 snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_soc_core,snd_soc_skl,snd_hda_core,snd_pcm_dmaengine
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 32768 1 snd_seq_midi
snd_seq 65536 2 snd_seq_midi,snd_seq_midi_event
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
snd_timer 32768 2 snd_seq,snd_pcm
snd 81920 24 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,snd_soc_core,snd_pcm,snd_rawmidi
soundcore 16384 1 snd
$ sudo fuser -v /dev/snd/*
USER PID ACCESS COMMAND
/dev/snd/controlC0: gdm 1967 F.... pulseaudio
shardul 4099 F.... pulseaudio
$ uname -a
Linux shardul-laptop 4.15.0-101-generic #102-Ubuntu SMP Mon May 11 10:07:26 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Searching for output from Pulseaudio and ALSA in /var/log/syslog or dmesg does not show any errors, except only occasionally,
[alsa-sink-ALC3253 Analog] alsa-sink.c: Error opening PCM device front:0: Device or resource busy
[pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.
I tried to manually unsuspend the sink with pacmd but that didn't change anything. I have also tried:
- reinstalling pulseaudio, alsa-base, and linux-sound-system
- uninstalling alsa-base altogether
- adding myself to the
audiogroup - bunch of pulseaudio kills and restarts, alsa reloads
- rebooting a bunch of times throughout the debugging process
How can I get my audio to work again? Thanks for your attention.
