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Description of problem:
after updating to NM-1.2.0-beta3 all devices are gone

[root@wlan-r2s17 ~]# nmcli device 
DEVICE  TYPE      STATE         CONNECTION 
eth0    ethernet  connected     testeth0   
eth1    ethernet  disconnected  --         
eth10   ethernet  disconnected  --         
eth2    ethernet  disconnected  --         
eth3    ethernet  disconnected  --         
eth4    ethernet  disconnected  --         
eth5    ethernet  disconnected  --         
eth6    ethernet  disconnected  --         
eth7    ethernet  disconnected  --         
eth8    ethernet  disconnected  --         
eth9    ethernet  disconnected  --         
wlan0   wifi      disconnected  --         
lo      loopback  unmanaged     --   

update 

[root@wlan-r2s17 ~]# systemctl restart NetworkManager
[root@wlan-r2s17 ~]# nmcli device 
DEVICE  TYPE  STATE  CONNECTION 
[root@wlan-r2s17 ~]# 

Version-Release number of selected component (if applicable):
NetworkManager-1.2.0-0.1.beta3.el7.x86_64

Created attachment 1151243 [details]
journal log

after reboot I cannot connect to system anymore. This is weird. Probably devices are still not there.

Could be a dupe of bug 1330090

*** This bug has been marked as a duplicate of bug 1330090 ***