Thanks for staying with me on this.
ctrl-alt-0 does nothing on the PC
But is it equivalent to this as per the attached screen capture?
As you see that option causes an error.
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On the server I am running :
LSB Version: :core-4.1-amd64:core-4.1-ia32:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-ia32:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-ia32:desktop-4.1-noarch:languages-4.1-ia32:languages-4.1-noarch:printing-4.1-ia32:printing-4.1-noarch
Distributor ID: RedHatEnterpriseWorkstation
Description: Red Hat Enterprise Linux Workstation release 7.9 (Maipo)
Release: 7.9
Codename: Maipo
Default Gnome Window Manager