Audio not working on Windows 8

A laptopt Conexant HD Smart Audio 221 is enabled and the sound meter is moving as if audio was working fine but no there is no audio playback. Also, YouTube video's play in slow-motion. On Spotify the progress bar moves (although slow) but no audio. This only happens after the notebook comes out of sleep-mode.

I have reinstalled the drivers and even tried to run them in windows 7 compatibility mode but still no audio. I couldn't find any newer drivers, and manufacturer gave me zero support. I think that it's related to the Conexant drivers, or the Mobile Intel 4 Series Express Chipset Family drivers.

please help me! thank you in advance

In control panel\device manager, right click your audio device, go to properties and check to see if it has a power management tab. If it does, make sure 'Allow the computer to turn off this device to save power' is unticked.