[Bug 915735] Re: plymouth: broken output on serial console (screen full of [-1; -1fUbuntu 10.04)

[Marius Gedminas]

I do not remember pressing Esc, but it cannot be ruled out.

The other day I upgraded an identical server from hardy to lucid, while
watching it over the serial console, and saw no sign of the text-mode
splash screen, just regular fsck messages.  This

I haven't tested for 8-bit cleanliness, but I do not think that is a
problem.  I think the problem is with ubuntu-text being unable to
determine the size of the terminal.  Try this in a gnome-terminal:

  $ echo -e '\033[1;1fHi'

you will see 'Hi' in the top-left corner.   Now try

  $ echo -e '\033[-1;-1fHi'

and you'll see the U+001b missing font glyph, overlapping a [, followed
by -1;-1fHi -- exactly what I saw over the serial console.

If ubuntu-text wants to position the text in the middle of the screen,
but it gets the coordinates wrong somehow, that would explain
everything, wouldn't it?

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https://bugs.launchpad.net/bugs/915735

Title:
  plymouth: broken output on serial console (screen full of
  [-1;-1fUbuntu 10.04)

Status in “plymouth” package in Ubuntu:
  Incomplete

Bug description:
  Lucid 10.04.3 LTS, plymouth 0.8.2-2ubuntu2.2.

  I rebooted the server while connected to the serial console of the integrated remote management card (HP iLO 2; basically, ssh servername-ilo, type VSP, observe the contents of ttyS1 relayed to my gnome-terminal).  After a few fsck messages I got this:
  (see attachment).

  When fsck finally finished (filling up several screens with
  "?[-1;-1fUbuntu 10.04?[-1;-1f. . . .?[-1;-1fUbuntu 10.04?[-1;-1f. . .
  .", where the ? stands for a little box drawing of a missing font
  glyph with code U+001b), I got my login prompt (from a custom
  /etc/init/ttyS1.conf that was based on /etc/init/tty1.conf, with just
  the device name and speed changed).

  The login prompt was in bright grey on white.  Basically invisible.

  Extra information:

  * /boot/grub/menu.lst has "# defoptions=console=tty0 console=ttyS1,115200n8"
  * /proc/cmdline contains "root=UUID=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx ro console=tty0 console=ttyS1,115200n8"
  * /etc/init/ttyS1.conf contains

      start on stopped rc RUNLEVEL=[2345]
      stop on runlevel [!2345]
      respawn
      exec /sbin/getty -8 115200 ttyS1

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