This bug has been copied from bug #579830 and has been proposed
to be backported to 4.8 z-stream (EUS).
commited as rev. 194795.
indeed I forgot one import
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Previously, the presence of the "\f" character in the Desktop Management Interface (DMI) information or any non-ASCII character in the hardware name rendered the system unable to register to both Red Hat Network (RHN) and Red Hat Network Satellite Server. This error has been fixed, and the system registration now works as expected.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.