Re: ttys1 displaying odd output
On Mon, Jan 07, 2008 at 12:43:05PM -0500, Scott Gifford wrote:
> joseph lockhart <jwl_andlovesaidno@yahoo.com> writes:
>
> > ok, checked my computer today and found strange output
> > on ttys1 which i only use for boot messages,
> >
> > [A[Dj[2~[G[Cp;vy[Co[D+ut [Dc +[Ci[Dx+ryi[D+
> > ri[D+ri[D+rc[C6[D[1~i+ 6[D[1~9[2+i 6[1~[yejsw
> >
> > [password:
>
> It's possible some other process opened the TTY and wrote garbage to
> it. You can use lsof to see if any running process still has the TTY
> open:
>
> lsof /dev/ttyS1
>
> IIRC, ttyS1 is a serial port. If that's the case, this could also be
> line noise on the serial cable.
>
> Or, as Chris Howie mentioned, it could be somebody banging on the
> keyboard. In my house at least, that would be the most likely
> explanation. :-)
But the output does have the appearance of escape sequences, perhaps
intended for a printer or terminal. The password prompt would seem
to imply there's a getty running on the device (tty1?, ttyS1?), and it's
just responding to an apparent user login.
Ken
--
Ken Irving, fnkci+debianuser@uaf.edu
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