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Old 03-05-2013, 09:25 AM   #1
LQ Newbie
Registered: Mar 2013
Location: Scotland
Distribution: Debian, Freescale LTIB
Posts: 7

Rep: Reputation: Disabled
Console Login respawning

Hi all,

I'm trying to login to an embedded target built using the Freescale LTIB system.
The target boots and starts getty but almost immediately respawns getty accepting but ignoring any keyboard entry.
The console is defined in securetty.

console output:
starting pid 1249, tty '': '/sbin/getty -L ttymxc0 115200 vt100'
process '/sbin/getty -L ttymxc0 115200 vt100' (pid 1249) exited. Scheduling for restart.

and repeats.

Any ideas what I can do to solve this?

Old 03-15-2013, 10:42 AM   #2
Registered: Jan 2011
Posts: 93

Rep: Reputation: 9
(I guess you already did it, but just the same) I'd check /dev/ttymxc0
Old 03-20-2013, 04:44 PM   #3
Registered: Sep 2011
Posts: 253

Rep: Reputation: Disabled

Is this something that has happened since a change to the system or configuration was made, or has the problem always existed, from the beginning?

Are you absolutely sure that the getty accepts tty input, or is it just that input is being echoed?

Is there something like a "Single User" mode that can be used to examine system logs, etc?

If it's something that happened after a change, such as changing the baud, I'd wonder if somehow the baud rate isn't supported by the device.

But in either case, I'd hope to find some "Single User" mode, etc., that perhaps didn't prevent me from logging in, to "grep" through the system logs, to search for answers.

In some of the most mysterious cases, I've found it helpful to run something like a C program I've constructed, in place of a getty, to try get some answers.

If it's an embedded system that by default doesn't use persistent storage for logs etc., but if there is removable persistent storage available, I'd try to rebuild it so that the removable persistent storage is used for logging, so I could remove the storage and examine the logs.

If it supports a serial console mode, and you are able to make use of the serial ports at all, I might try that approach.

I hope this helps.
Old 03-28-2013, 05:26 PM   #4
LQ Newbie
Registered: Mar 2013
Location: Scotland
Distribution: Debian, Freescale LTIB
Posts: 7

Original Poster
Rep: Reputation: Disabled
This was on a new build that had never been run before and it turned out I needed some other drivers to be selected once I included them the machine booted without issue.


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