acpi error in dmesg

[Jani Monoses]

Hello
I am trying to see why the soundcard is mute after resuming from sleep.
Could these errors in dmesg be related?

[4302049.292000] Back to C!
[4302057.865000] write EC, IB not empty
[4302057.866000] ACPI-0423: *** Error: Handler for [EmbeddedControl]
returned AE_TIME
[4302057.867000] ACPI-0508: *** Error: Method execution failed
[\_SB_.C003.C004.C005.C114] (Node dffb63c0), AE_TIME
[4302057.868000] ACPI-0508: *** Error: Method execution failed [\_WAK] (Node
dffb1400), AE_TIME
[4302057.869000] ACPI-0567: *** Error: Method _WAK failed, AE_TIME

on subsequent sleeps It's only the Back to C! line w/o the rest of the
messages.
the model is HP Nx8220

Jani
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