it’s tricky because if I cat /var/log/syslog it will crash the network and have to pull the plug.
However, in part of the log I saw many messages like:
brcmfmac: _brcmf_set_multicast_list: setting mcast_list failed
which Google relates to a Raspi loosing the network.
The pages I found are somewhat old, should I do an rpi-update?
Since the problem is acknowledged, there might be a patch.
Anyway, at the moment it is connected only to LAN, and I see only one IP address listed, so I suppose the problem it’s in the wlan0 setup.
I have no peripherals connected, excepting the BT dongle.