WiFi disconnects (power save)

[schneemaier]

More details https://github.com/tomaspinho/rtl8821ce/issues/143#issuecomment-813094208

Added https://forums.raspberrypi.com/viewtopic.php?t=95680 resolution as test. rtw_power_mgnt=0 rtw_enusbss=0 rtw_ips_mode=1

So far the issue is solved with keeping the WiFi alive with ping

[schneemaier]

more things to play with https://forums.debian.net/viewtopic.php?t=125402