Comment 16 for bug 1784485

I'm also having an issue with my ux391ua running MATE18.04 with no Windows 10 installed. There is sound output audible with headphones on and volume >100% but it is very distorted and crackly. 18.10 was not helpful and updating kerenel to 19 doesn't change anything.

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC294 Analog [ALC294 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

pacmd list-cards
1 card(s) available.
    index: 0
 name: <alsa_card.pci-0000_00_1f.3>
 driver: <module-alsa-card.c>
 owner module: 7
 properties:
  alsa.card = "0"
  alsa.card_name = "HDA Intel PCH"
  alsa.long_card_name = "HDA Intel PCH at 0xec228000 irq 135"
  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 = "0"
  device.description = "Built-in Audio"
  module-udev-detect.discovered = "1"
  device.icon_name = "audio-card-pci"

I've tried various mixer related avenues which do nothing. I noticed that pavucontrol shows sound btw.