I have an issue on my Debian computer with Intel Stick.
I have extra character in console tty like ^[
This issue is only with supperior 4.11.12 kernel
Debian kernel and 4.11.12 kernel is ok
I dont know why
Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. It only takes a minute to sign up.Sign up to join this community
This is not your TTY settings, and the
reset command (which you could not even execute anyway, as you have not logged in) will gain you nothing. Indeed, in most modern Linux operating systems the terminal has just been reset before running the
login program (by dint of systemd's
TTYReset=yes setting or otherwise), and that has clearly had no effect.
This is your ⎇ Alt key being stuck down, or the kernel's built-in terminal emulator thinking that it is.
When the kernel's built-in terminal emulator sees ⎇ Alt plus an alphanumeric key, it transmits the character sequence
␛ (U+001B) followed by the character for the key to the input of the line discipline. And
^[ is how the line discipline echoes back an
␛ character when it receives one as input (and it is in canonical mode, as it is here).
^[r is how ⎇ Alt+r is echoed back to you.
It's possible for the terminal emulator's idea of what modifier keys are currently pressed to become out of synch with the actual keyboard state, for reasons beyond the scope of this answer. Press and release all of your ⎇ Alt keys, without pressing any of the key chords that switch amongst the kernel VTs, and the state should become synchronized again.
If that does not work, then the next thing to investigate is whether the modifier key is indeed physically stuck down.