No sound processing method after standby recovery

Most of these problems occur in laptops. And most of them happen on computers without the For Windows 7 tag.
This is the case, after the notebook is in standby, even if there is no sound for a long time, the sound card will automatically turn off. Even if the display card is not used for a long time, it will be turned off. However, when you need them to work, the driver will automatically send an instruction to wake up the device.
However, the problem is coming. Many computer drivers for Not for Windows 7 do not support Windows 7, or their hardware does not support Windows 7. When the device enters the OFF mode, Win7 wants to let it live again. It doesn't work …… which leads to no sound, and some people say that after the night, the screen will be black for a long time, and so on.
I have an emergency solution. When you resume from standby mode, open the sound card driver, and then click the left and right speaker icon (that is, the one that wants to put music to test the sound) and resume. Sometimes, your computer is silent for a long time. When you resume, you will find that Media crashes when you release the song. It may also be caused by the sound card not working. Of course, this is only an emergency solution. If you really solve it for a long time, you must use other methods to cure it.
This method is limited to: the sound card can not wake up, the driver hardware does not support. And it may only support some notebooks. In other cases, this method is invalid.