Bug 1005625

Summary:	System boots up with serial port RTS asserted
Product:	[Fedora] Fedora	Reporter:	Jim Haynes <jhhaynes>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	19	CC:	gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, marcelo.barbosa, skottler
Target Milestone:	---
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Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-09-09 19:34:25 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Jim Haynes 2013-09-09 02:49:35 UTC

Description of problem:System with a real serial port - during bootup the
request-to-send lead is asserted and stays so, until an application uses
the port.  This is annoying when RTS is used to control a radio transmitter.


Version-Release number of selected component (if applicable):I'm not sure how
long this has been going on, but it's been a while.


How reproducible: Always


Steps to Reproduce:
1.Monitor RTS lead on serial port
2.Boot up system
3.

Actual results:RTS lead is asserted until I log in and start an application
that connects to the serial port ttyS0


Expected results: Should not assert the RTS signal until something wants
to use the port.


Additional info:

Comment 1 Josh Boyer 2013-09-09 12:58:59 UTC

Do you have modemmanager installed?  If so, uninstall it and see if the problem goes away.

Comment 2 Jim Haynes 2013-09-09 19:34:25 UTC

Thanks.  That turned out to be the problem - case closed.

Altho it was a little more obscurified than that - the program running is
named modem-manager and the package is named ModemManager, so at first I
didn't find it.