mon0 - No such device

Hello,
I searched alot for answer of this problem. I did not get a definite answer..
There is some problems that I Did not solved.
first, when Im trying to run "airmon-ng start wlan0"

Code:

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Found 3 processes that could cause trouble.
If airodump-ng, aireplay-ng or airtun-ng stops working after
a short period of time, you may want to kill (some of) them!
-e
PID    Name
2522    NetworkManager
3444    wpa_supplicant
3640    dhclient
Process with PID 3442 (wlan0) is running on interface wlan0
Process with PID 3640 (dhclient) is running on interface wlan0
 
 
Interface      Chipset        Driver
 
wlan0          Unknown                r8712u (monitor mode enabled)

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you can see the command "r8712u (monitor mode enabled)" and not "(monitor mode enabled on mon0)".
second problem with running "iwconfig mon0":

Code:

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root@kali:~# iwconfig mon0
mon0      No such device

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Please help, sorry for my bad english..

Try running ifconfig. Maybe it did not call it mon0. If the connection is a "managed connection" then it will be called something other than xxxxmon0 where the "x" is a pre-appended.

Try
airmon-ng check kill (this will exit network manager,wpasuplicant and dhclient )
airmon-ng start wlan0 (or whatever your interface is)

iwconfig mon0