https://access.redhat.com/documentation/en/red-hat-virtualization/4.0/single/administration-guide/#sect-SPICE_Log_Files From the document should be removed next entity: "if a SPICE client was launched using a browser plug-in, debugging is generally controlled by environment variables" justification: Spice component in RHV doesn't provide browser plug-in. It was removed.
Thanks, Andrei. We're tracking this in bug 1326295 already, so closing this one as a duplicate. *** This bug has been marked as a duplicate of bug 1326295 ***