Chrome Version: 69.0.3497.95 (Official Build) (64-bit)
Chrome OS Version: 10895.56.0 (Official Build) stable-channel eve
Chrome OS Platform: Pixelbook
Network info: "Books-and-Coffee" wifi

Please specify Cr-* of the system to which this bug/feature applies (add
the label below).

Steps To Reproduce:
(1) Go here (https://developer.android.com/topic/arc/development-environment) to enable USB for Android Studio externally connected Android device.
(2) run: sudo crossystem dev_enable_udc=1
(3) reboot
(4) Sound no longer works.
(5) run: sudo crossystem dev_enable_udc=0
(6) reboot
(7) sound works now.

Expected Result:

Sound should not break when enabling USB debugging. Or, it should be better communicated that this will break your sound and suggest how to turn it off. I only figured this out because I powerwashed my device and noticed sound working again. When I started reconfiguring for usage of Android Studio, I noticed it broke again and started troubleshooting.

Actual Result:

How frequently does this problem reproduce? (Always, sometimes, hard to
reproduce?)

Everytime

What is the impact to the user, and is there a workaround? If so, what is
it?

Workaround is to sudo crossystem dev_enable_udc=0

Please provide any additional information below. Attach a screen shot or
log if possible.

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.