Hey Thank you so much to everybody, specially Raymond (superquad-vortex2) for pointing to node 0x1a, work like a charm installing hdajackretask, chosing Realtek ALC668, marking show unconnected pins and, find Pin ID 0x1a mark override, choose line out (center/LFE) and apply now and that's it enjoy the great sound of Alienware 14, i hope this work for others, sorry for my terrible english.
Hey Thank you so much to everybody, specially Raymond (superquad-vortex2) for pointing to node 0x1a, work like a charm installing hdajackretask, chosing Realtek ALC668, marking show unconnected pins and, find Pin ID 0x1a mark override, choose line out (center/LFE) and apply now and that's it enjoy the great sound of Alienware 14, i hope this work for others, sorry for my terrible english.