I've compared the schematics of w230st and w230ss from the service
manuals and the codec is exactly the same, but the w230ss has an
additional chip between the codec and the headphone jack. The manual
says that it's an pre-amp but doesn't mention the exact model. The pre-
amp is connected to the SMBus, I guess it needs initialization after
standby.

The service manual also has photos of the motherboard, unfortunately
they are low-res and it's not possible to identify the chip.

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https://bugs.launchpad.net/bugs/1313904

Title:
  [W230SS, VIA VT1802, Green Headphone Out, Front] No sound after fresh
  boot

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