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dr-bios.com
I have researched about this problem.
Problem initial: The audio no work in my laptop
Update of the problem: The audio no work in Windows but it work in Linux
Conclutions: There is a problem with official drivers or the problem is relationated with the legacy bios that you shared with me. I think that the bios is giving priority to headphones instead of speakers. I have installed many times the drivers and one time worked! (the drivers would seem to be bugged but they worked until i reinstall the drivers out of curiosity). On Linux, I can switch between the headphones and speakers, thus i can do to work they.
If you know of mod bios could to check the priority of speakers or share me a backup of audio drivers (maybe work)