NetworkManager Applet does not show available eth0

Hi Folks,

NetworkManager Applet v. 1.32 from XFCE4 4.18 does not see the Ethernet interface: No network connection

ipconfig eth0 shows:

Code:2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:26:6c:3e:7f:38 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.3/24 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::226:6cff:fe3e:7f38/64 scope link
valid_lft forever preferred_lft foreverand

Code:nmcli d
DEVICE TYPE STATE CONNECTION
lo loopback connected (externally) lo
wlan0 wifi unavailable --
eth0 ethernet unmanaged --I tried to change the managed to true

Code:nmcli d set eth0 managed yesand still shows "unmanaged"

I created a New Connection Type (Ethernet) in NetworkManager Applet OK but still does not shows as available.
I reinstalled the applet but no changes.

Code:inxi -n
Network:
Device-1: Realtek RTL810xE PCI Express Fast Ethernet driver: r8169
IF: eth0 state: up speed: 100 Mbps duplex: full mac: 00:26:6c:3e:7f:38
Device-2: Realtek RTL8191SEvB Wireless LAN driver: rtl8192se
IF: wlan0 state: down mac: 56:a6:16:67:04:f8UPDATE:
Somehow eth0 is available now.
Code:[ifupdown]
managed=falseadded in NetworkManager
Now NM shows 2 available interfaces: eth0 and ifupdown. I can connect to both. Also:
Code:nmcli d
DEVICE TYPE STATE CONNECTION
eth0 ethernet connected eth0
lo loopback connected (externally) lo
wlan0 wifi unavailable

Thanks!