[screen output] How to debug this?

screen has some exceptional string like " < < < "
after i ctrl + D enter console,
then all command does not have output ,
what is the possible cause for it?

do you mean physical screen/console, or the application screen ?

  • what device
  • what version of openwrt
  • post dmesg

ctrl+d is a kind of a shortcut for exit (not exactly the same mechanism)

mobaxterm app's screen

for reference, try putty too ....