In Wi-Fi connection the IPv4 address is not assigned.

[stevef]

OK, there are a number of issues there.  I haven't yet looked through the log.
Edit - I've now looked through it and it appears to be the same as the second part of the log you posted before with a few extra lines at the end.

I think it is best to only change one thing at a time. There are reports of adaptors not recovering if they enter a power saving state. Your adaptor is set to try to power save.
So first, please turn off power management on the wifi adaptor to see if it improves.

Run

Code:

iwconfig

and confirm the current setting is on

wlp2s0    IEEE 802.11  ESSID:"TIM-27991109"
          Mode:Managed  Frequency:2.462 GHz  Access Point: 20:B0:01:AB:1C:45 
          Bit Rate=13 Mb/s  Tx-Power=15 dBm 
          Retry short limit:7  RTS thr:off  Fragment thr:off
          Power Management:on
          Link Quality=57/70  Signal level=-53 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:29  Missed beacon:0

Open the configuration file with

Code:

sudo nano /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

Enter your password if asked.

This should open a text editor displaying something like this.

[connection]
wifi.powersave = 3

Use the arrow keys to move around the screen and replace the '3' with '2' so the line looks like this

wifi.powersave = 2

Press Ctrl and O to write the change to the file
Press 'Enter' to confirm the file name
Press Ctrl and X to exit the editor
Check the change has been saved with

Code:

cat /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

Restart the computer and log back on. Repeat the comand

Code:

iwconfig

and check the state of power management

Power Management:off

If the line for 'Power Management' now reads 'off' run the machine as normal.
Let us know what happens