Thanks! That seems to have gotten around the hang. Here's a copy of the results.log that I get when running "sudo fwts uefirtvariable" on one of the affected computers. Several of the tests are now returning EFI_INVALID_PARAMETER. I don't know if this indicates an EFI bug or a bug in fwts. If you need access to one of the systems that's failing to do further diagnostics yourself, that can be arranged; just say so.
Ivan,
Thanks! That seems to have gotten around the hang. Here's a copy of the results.log that I get when running "sudo fwts uefirtvariable" on one of the affected computers. Several of the tests are now returning EFI_INVALID_ PARAMETER. I don't know if this indicates an EFI bug or a bug in fwts. If you need access to one of the systems that's failing to do further diagnostics yourself, that can be arranged; just say so.