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>
    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
    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
        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"
        analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
                device.icon_name = "audio-speakers"
        analog-output-headphones: Headphones (priority 9000, latency offset 0 usec, available: no)
                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 audio group
  • 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.

2 Answers 2


Turns out this was due to a recent kernel upgrade, from 4.15.0-96 to 4.15.0-101. I did not immediately see the problem because the new kernel would have been used only after a reboot, which I had to do due to the crash described in my question. This is the relevant kernel bug although my laptop is an Inspiron 5378 instead of 5368. I was able to solve the issue by:

  1. sudo apt-get purge pulseaudio alsa-base
  2. Reboot, choosing the older kernel version at boot time
  3. sudo apt-get install pulseaudio alsa-base
  4. Reboot, again choosing the older kernel

Not sure that this will be sufficient to fix it for others because I reinstalled, deleted config, played around with settings, etc. a whole bunch before discovering this.


The latest release of this (kernel.zip) fixed it for me. All credit to Heikomat for an excellent solution.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.