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I am pretty much a beginner with desktop linux and I recently installed Ubuntu 18.04 on my newly bought Lenovo P51s. Works fine besides a strange sound problem:

  • Sound output (internal speakers) is at very low volume and the sound quality is terribly poor (like out of a tin can) when played from Chrome/Chromium, Rhytmbox, VLC, etc.
  • But: Volume and quality is fine when played from Firefox
  • If any source besides Firefox is already playing sound, sound from Firefox is also bad.
  • pavucontrol shows same level for all applications. Moving beyond 100% leads to distortion.
  • alsamixer: all 100%

My audio device is a

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC298 Analog [ALC298 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #

Any suggestions? Is this a known issue? What kind of information should i additionally provide?

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The upgrade to Ubuntu 19.04 solved to issue for me.

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