Bug 1222 – getty enabled on /dev/ttyS0 and respawned periodically

Bug 1222 - getty enabled on /dev/ttyS0 and respawned periodically


Summary:	getty enabled on /dev/ttyS0 and respawned periodically

Status:	RESOLVED FIXED

Product:	Desktop platform
Component:	startup-shutdown
Version:	3.1
Platform:	All All

Importance:	Medium normal (vote)
Target Milestone:	3.2
Assigned To:	Maemo QA (deprecated)
QA Contact:	Maemo QA (deprecated)

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree

Reported:	2007-04-19 11:19 UTC by Frantisek Dufka
Modified:	2007-12-04 13:28 UTC (History)
CC List:	3 users (show)

See Also:

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Description Frantisek Dufka (reporter) maemo.org

2007-04-19 11:19:36 UTC

It seems there is a bug in
/etc/init.d/ttyusb0 stript

        #test if we can read ttyS0, we have serial console
        if dd of=/dev/ttyS0 count=1 bs=1 if=/dev/zero ; then

instead of reading ttyS0, dd creates normal file named ttyS0 in /dev/ with 1
byte lenght. Result is that script enables getty over ttyS0 in /etc/inittab and
getty gets respawned periodically by init (since it gets regular file as
argument and exits)

init tries to respawn it few times in short interval and then pauses for some
longer interval so you can't see it with ps everytimes

'ps | grep getty' sometimes prints getty with changing PIDs and sometimes getty
is not running at all.

Comment 1 Eero Tamminen nokia

2007-04-19 11:39:10 UTC

NB#54590

Comment 2 Frantisek Dufka (reporter) maemo.org

2007-05-08 13:59:54 UTC

Forgot to mention workaround here, just comment getty over ttyS0 line in
/etc/inittab with two # so ttyusb0 does not touch it on boot.

##T0:12345:respawn:/sbin/getty -L ttyS0 115200 vt100

Comment 3 Eero Tamminen nokia

2007-08-10 16:16:28 UTC

Should be fixed in the latest release.

Comment 4 Eero Tamminen nokia

2007-12-04 13:28:31 UTC

Internally this ist the same issue as bug 448 i.e. fixed in Bora.