On Fri, 14 Mar 2014 19:36:54 -0000, "Moore, Robert" said:
> Sabrina, Valdis:
>
> Do either of you see any error messages like this:
>
> ACPI Error: Mutex [0x1] is not acquired, cannot release (20140214/utmutex-437)

All of my "ACPI Error:" messages look like either:

ACPI Error: Cannot acquire Mutex for method [SNVC], current SyncLevel is too large (1) (20140214/dsmethod-362)

or

ACPI Error: Method parse/execution failed [\ECBT] (Node ffff88012d02d588), AE_AML_MUTEX_ORDER (20140214/psparse-536)

I should have a git bisect finished shortly...