Berknip Coolstar Audio Driver Broken

System Details

  • Device: Berknip
  • OS: Version 25H2 (OS Build 26200.7840)
  • Firmware Type: UEFI Full ROM
  • Firmware Version: coreboot MrChromebox-2512.2, 1/25/2026
  • Internal storage type: eMMC

Summary of the Issue

Driver Installs, lets me select device but there is no speaker output, and it breaks video playback in all applications as if stuck on waiting for audio device. If I plug in a USB headset video playback works immediately.

Steps to Reproduce

  1. Install on Berknip

  2. Try to use

  3. Try work around

Expected Behavior

Speakers should work and even if not at least video playback should

it started working again after a firmware update