[Bug 1442405] [NEW] plymouth locks console termios, breaking serial consoles

[Andy Lutomirski]

Public bug reported:

I have a more or less standard non-graphical Ubuntu 14.04 server
installation.  I boot with console=ttyS1,115200, and I have
/etc/init/ttyS1.conf that's more or less the same as all the standard
/etc/init/ttyN.conf files.

The serial console login doesn't work because plymouth seems to think
it's showing its bootsplash and it locks the termios settings using
TIOCSLCKTRMIOS.  This completely breaks /bin/login, which *requires*
working buffered mode.

I have no idea what mechanism is supposed to tell Plymouth to dismiss
its splash screen when boot up is done, but it's clearly broken.  What
gives?

** Affects: plymouth (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: upstart (Ubuntu)
     Importance: Undecided
         Status: New

** Also affects: plymouth (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1442405

Title:
  plymouth locks console termios, breaking serial consoles

Status in plymouth package in Ubuntu:
  New
Status in upstart package in Ubuntu:
  New

Bug description:
  I have a more or less standard non-graphical Ubuntu 14.04 server
  installation.  I boot with console=ttyS1,115200, and I have
  /etc/init/ttyS1.conf that's more or less the same as all the standard
  /etc/init/ttyN.conf files.

  The serial console login doesn't work because plymouth seems to think
  it's showing its bootsplash and it locks the termios settings using
  TIOCSLCKTRMIOS.  This completely breaks /bin/login, which *requires*
  working buffered mode.

  I have no idea what mechanism is supposed to tell Plymouth to dismiss
  its splash screen when boot up is done, but it's clearly broken.  What
  gives?

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