Brazilian Positivo Notebook anonymous motherboard ALC269BV no sound

I have a notebook whose sound card only works when ear phone is jacked in, Fedora, windows, all failed,, it is a cheap Brazilian notebook whose
dishonest firm http://www.positivoinformatica.com.b...b-computadores uses clove.com.tw drivers but hide all information. Linux nowh 4.4.0-27-generic #46-Ubuntu SMP Tue Jun 21 17:44:08 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux /POSITIVO FIRM denies the brand of the motherboard, opening the notebook to get the serial number and find out the motherboard manufacturer is hazardous ( Brazil import all mother boards but some firms have the nastily peddle it as national brand ) so I will describe to you here in English in the next hours and translate it into Portuguese Language for other victims of the dishonest notebook seller firm POSITIVO, on the ubuntu forum at https://www.vivaolinux.com.br/perguntas/ . Positivo sells the notebook as XRI3150 and the drivers for windows are here http://www.positivoinformatica.com.b...txtNumeroSerie But not even windows can install the correct driver, in desperation I tried windows, but it also failed, as a matter of fact the sound driver works but it is unstable, it works for a while then it disappears, it worked for a while in Fedora 23, then out of thin air, it disappeared, and stopped working, the REALTEK flickers, kind of change configuration alone as if by satellite interference or black magic, I do not know, sometimes I even had the impression the volume was being altered real time and subliminal messages were implanted on realtek, a symptom of distress maybe, after trying to fix the audio for weeks without a result, but now I will lea LINUX and I want to understand what is going on, so I am here. I wish I could enter lspci and start the hardware probing but my computer is all in Portuguese Language, so I am first changing it in English so I can describe the hardware to you in English. I am posting in Portuguese here: https://www.vivaolinux.com.br/topico/Notebooks/Positivo-Notebook-XRI3150-desonesta-placa-anonima-ALC269VB-sem-som . I am stressed out

EDITING (...) I will be back in the next minutes (...)