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Message #69067
[Bug 1442405] Re: plymouth locks console termios, breaking serial consoles
The official docs [1] say to do:
--- cut here ---
# ttyS0 - getty
#
# This service maintains a getty on ttyS0 from the point the system is
# started until it is shut down again.
start on stopped rc or RUNLEVEL=[12345]
stop on runlevel [!12345]
respawn
exec /sbin/getty -L 115200 ttyS0 vt102
--- cut here ---
I have:
--- cut here ---
# ttyS1 - getty
#
# This service maintains a getty on ttyS1 from the point the system is
# started until it is shut down again.
start on stopped rc RUNLEVEL=[2345] and (
not-container or
container CONTAINER=lxc or
container CONTAINER=lxc-libvirt)
stop on runlevel [!2345]
respawn
exec /sbin/getty -8 115200 ttyS1
--- cut here ---
But this isn't a race -- IMO it really is a bug, if only a documentation
bug perhaps. plymouth-stop.conf has:
start on (starting gdm
or starting kdm
or starting xdm
or starting lxdm
or starting lightdm
or starting uxlaunch
or starting ubiquity
or starting oem-config
or stopped rc RUNLEVEL=[2345]
or starting rcS
or starting mountall-shell)
It never runs at all on a non-graphical system. Heck, I don't even see
why console=tty1 or perhaps no console arg at all works correctly if
there's no graphical greeter in that list. This isn't a race -- it's
just completely broken in these configurations.
IMO plymouth should stop whenever a getty starts on the tty that
plymouth is in charge of.
Please reopen.
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https://bugs.launchpad.net/bugs/1442405
Title:
plymouth locks console termios, breaking serial consoles
Status in plymouth package in Ubuntu:
Incomplete
Status in upstart package in Ubuntu:
Invalid
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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