On Thursday, February 8, 2018 at 3:32:56 PM UTC-5, Tim W wrote:
> Yes mostly that makes sense.  I am not cealr on your last part but may be 
> reading it incorrectly.  If checking the box should automatically check to
> ensure mem is included in the services list and if not add it then why would 
> it also disable mem if it does not find it in the services list?   Seems like 
> its staying to do two opposing actions when running the checklist add it  if 
> its not found but also disable it if its not found?

Generally: the listing of a qubes service in the services tab allows you to 
override the default setting for that service. Some services are enabled by 
default, so if they are not listed they are still enabled. This also applies to 
the qvm-service tool.

e.g. meminfo-writer is by default *enabled* on all VMs with the exception of 
NetVMs (or for R4.0, this would be a VM that "provides network"). So if it is 
not listed, it is *enabled*.

Reference #1:

  From: https://www.qubes-os.org/doc/vm-interface/
  [[/qubes-service/SERVICE_NAME - subtree for VM services controlled from dom0 
  (using qvm-service command or Qubes Manager). One of 1, 0. Note that not 
every 
  service will be listed here, if entry is missing, it means “use VM default”. 
  List of currently supported services is in qvm-service man page]]

 (useful since it points to the man page for qubes-service below...)

Reference #2:
  man qvm-service says (manual copy-paste):
    meminfo-writer
      Default: enabled everywhere excluding NetVM

So, again: if under services, meminfo-writer is *not listed*, it is *ENABLED*.

Brendan

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