ok this seems to have worked. not errors. and didnt freeze. tv working.
systemctl stop service.tvheadend42
rmmod dvb_usb_rtl28xxu
rmmod rtl2832
rmmod dvb_usb_v2
rmmod dvb_core
wait some sec
modprobe dvb_usb_v2
modprobe rtl2832
modprobe dvb_usb_rtl28xxu
systemctl start service.tvheadend42
can you help me with what i do now? thanks.