Tx-power= 0 dBm on wlan0mon when monitoring; but Tx-power = 20 dBm on Wlan0 when managed. Help!

[FallenSnipa]

Hey everyone!

I have an issue trying to set my power to 20 when I'm monitoring. I'm using Kali lastest version from a Live CD (USB) and as chipset a Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter built-in my laptop to monitor. So here is the info:

iwconfig

root@kali:~# iwconfig
eth0 no wireless extensions.

wlan0 IEEE 802.11 ESSID:"Ever's House"
Mode:Managed Frequency:2.417 GHz Access Point: 2C:9D:1E:E3:FC:80
Bit Rate=1 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thrff Fragment thrff
Encryption keyff
Power Managementn
Link Quality=58/70 Signal level=-52 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:13 Missed beacon:0

lo no wireless extensions.

sudo iw list

Frequencies:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (20.0 dBm)
* 2472 MHz [13] (disabled)
* 2484 MHz [14] (disabled)

sudo iw dev

Interface wlan0
ifindex 3
wdev 0x1
addr 9c:b6:d0:0d:4b:b5
ssid Ever's House
type managed
channel 2 (2417 MHz), width: 20 MHz, center1: 2417 MHz
txpower 20.00 dBm
multicast TXQ:

BUT THEN... when then i try to monitor here is what happens

airmon-ng start wlan0

Found 3 processes that could cause trouble.
Kill them using 'airman-ng check kill' before putting
the card in monitor mode, they will interfere by changing channels
and sometimes putting the interface back in managed mode

PID Name
3902 NetworkManager
3918 wpa_supplicant
3923 dhclient

PHY Interface Driver Chipset

phy0 wlan0 ath10k_pci Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)

(mac80211 monitor mode vif enabled for [phy0]wlan0 on [phy0]wlan0mon)
(mac80211 station mode vif disabled for [phy0]wlan0)

then i kill those processes and then

iwconfig

eth0 no wireless extensions.

wlan0mon IEEE 802.11 Mode:Monitor Frequency:2.457 GHz Tx-Power=0 dBm
Retry short limit:7 RTS thrff Fragment thrff
Power Managementn

lo no wireless extensions.

Power goes to zero. Any idea how I can fix it? I believe this is the issue why ii dont get any BSSID when I use after listening for a while with

airodump-ng wlan0mon

CH 3 ][ Elapsed: 4 mins ][ 2019-08-04 17:26

BSSID PWR Beacons #Data, #/s CH MB ENC CIPHER AUTH ESSID


BSSID STATION PWR Rate Lost Frames Probe

Nevertheless with I switch to manage mode everything is ok and it gets connection to my test wifi: Ever's House. So what I can do to fix this? Thank guys!