Bug 1005625 - System boots up with serial port RTS asserted
Summary: System boots up with serial port RTS asserted
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 19
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-09-09 02:49 UTC by Jim Haynes
Modified: 2013-09-09 19:34 UTC (History)
7 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2013-09-09 19:34:25 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

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.


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