Not strictly a "test" question but.....
I rebuilt NetworkManager-0.9.10.0-6.git20140704 from F21 for F20 and installed it. After
2 days I have not seen
https://bugzilla.redhat.com/show_bug.cgi?id=1059597. It normally
crops up within 6 hrs of a reboot. So, I've fairly high confidence that this has
fixed the issue.
How best to go about asking for NetworkManager-0.9.10.0-6 be officially added to F20?
I've made a note in the bugzilla....but there doesn't appear to have been any
activity on bug since being reported back in January.
--
If you can't laugh at yourself, others will gladly oblige.