This happened in the past with the previous release and successively with the last one .  Turning off the pc in "suspend" and then waking up makes networking working again.  I tried to assign fixed IP: in "connection information" IPv4 appears configured but the browser didn't retrieve web pages from the internet. I was forced to reinstall the last release 6.6 and initially it worked fine but since  some days  the problem proposed again.
Booting from the live cd, all works properly almost all the time.  Maybe it is an hardware fault but i dont know how to detect it (perhaps whith a diagnostic tool).

Computer
********


Summary
-------

-Computer-
Processor : Intel® Core™ i3-2310M CPU @ 2.10GHz
Memory : 3913MB (680MB used)
Machine Type : Notebook
Operating System : Linux Lite 6.6
User Name : linuxlite (linuxlite)
Date/Time : dom 21 gen 2024, 09:09:29
-Display-
Resolution : 1366x768 pixels
OpenGL Renderer : Mesa Intel® HD Graphics 3000 (SNB GT2)
X11 Vendor : The X.Org Foundation
-Audio Devices-
Audio Adapter : HDA-Intel - HDA Intel PCH
-Input Devices-
Lid Switch
Power Button
Sleep Button
Power Button
AT Translated Set 2 keyboard
  USB OPTICAL MOUSE
Video Bus
ImExPS/2 Generic Explorer Mouse
cmpc_keys
USB2.0 UVC 1.3M Webcam: USB2.0
HDA Intel PCH Mic
HDA Intel PCH Headphone
HDA Intel PCH HDMI/DP,pcm:3
-Printers (CUPS)-
DCP-197C : <i>Default</i>
-SCSI Disks-
ATA ST9500325AS
Generic- Multi-Card
HL-DT-ST DVDRAM GT40N

Operating System
----------------

-Version-
Kernel : Linux 5.15.0-91-generic (x86_64)
Version : #101-Ubuntu SMP Tue Nov 14 13:30:08 UTC 2023
C Library : GNU C Library / (Ubuntu GLIBC 2.35-0ubuntu3.6) 2.35
Distribution : Linux Lite 6.6
-Current Session-
Computer Name : linuxlite-Spring-Peak
User Name : linuxlite (linuxlite)
Language : it_IT.UTF-8 (it)
Home Directory : /home/linuxlite
-Misc-
Uptime : 3 minutes
Load Average : 0,62, 0,94, 0,44
Available entropy in /dev/random : 256 bits (medium)

Network
*******


Interfaces
----------

-Network Interfaces-
lo 0,05MiB 0,05MiB 127.0.0.1
enp19s0 0,00MiB 0,00MiB
wlp2s0 0,01MiB 0,01MiB

IP Connections
--------------

-Connections-
127.0.0.1:631 LISTEN 0.0.0.0:* tcp
0.0.0.0:445 LISTEN 0.0.0.0:* tcp
127.0.0.53:53 0.0.0.0:* udp
0.0.0.0:139 LISTEN 0.0.0.0:* tcp
:::445 LISTEN :::* tcp6
:::139 LISTEN :::* tcp6
::1:631 LISTEN :::* tcp6
0.0.0.0:34538 0.0.0.0:* udp
127.0.0.53:53 0.0.0.0:* udp
127.0.0.1:123 0.0.0.0:* udp
0.0.0.0:123 0.0.0.0:* udp
0.0.0.0:631 0.0.0.0:* udp
0.0.0.0:5353 0.0.0.0:* udp
fe80::5111:a713:70c:123 :::* udp6
::1:123 :::* udp6
:::123 :::* udp6
fe80::5111:a713:70c:546 :::* udp6
:::35652 :::* udp6
:::5353 :::* udp6