Hi,

My XPS 13 9370 has an issue where the audio might crash and stop working after a certain amount of time or after waking up the PC from sleep. This issue only applies to the laptop's external speakers, plugging in headphones will output sound to the headphones. But for the speakers the only solution that I was able to find was restarting the computer. 

I'm almost certain I've started experiencing this issue after I updated the audio drivers through the Dell Update system. I haven't had this issue before then.

Is there any known solutions?

Windows Troubleshooter reinstalled the drivers. That didn't fix the issue.
I tried to roll back drivers from device manager, device manager didn't give me the option to roll back (Option was grayed out)