Re: Issue with RS232 <-> USB adaptor (FC15)

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Le 14/06/2011 à 23:20, f8arr a écrit :
I found !!!!!!!!!!!!!!!!!!!!!!!!!

The problem came from modem-manager lauched by dbus.
In order to desactivate I had to remove

/usr/share/dbus-1/system-services/org.freedesktop.ModemManager.service

The following trace on /var/log/messages put me on the rails:

Jun 13 14:32:24 f8arr2-station modem-manager[721]: <info> (ttyUSB0)
closing serial port...
Jun 13 14:32:24 f8arr2-station modem-manager[721]: <info> (ttyUSB0)
serial port closed
Jun 13 14:32:24 f8arr2-station modem-manager[721]: <info> (ttyUSB0)
opening serial port...
Jun 13 14:32:24 f8arr2-station modem-manager[721]: <info> (ttyUSB1)
closing serial port...
Jun 13 14:32:24 f8arr2-station modem-manager[721]: <info> (ttyUSB1)
serial port closed
Jun 13 14:32:24 f8arr2-station modem-manager[721]: <info> (ttyUSB1)
opening serial port...
Jun 13 14:32:24 f8arr2-station modem-manager[721]: <info> (ttyUSB0)
closing serial port...
Jun 13 14:32:24 f8arr2-station modem-manager[721]: <info> (ttyUSB0)
serial port closed

Well done ! But it's rather strange that "fuser" didn't give away the name of the culprit... As the modem-manager application seems to keep opening and closing the ttys, you must have been unlucky and "fuser" checked just when the port was closed...


This is working now !!
Thanks everybody for support

Well, thanks to you, as there is no doubt this kind of information is useful for everybody. We can all be victims of those little processes launched without notice (usually at session startup time). Linux is becoming too complicated sometimes, haha ! :-)


Let's go on the rock now (EME) !!!

Good luck ! Maybe we'll have the opportunity to make a QSO via moonbounce one day: I'm a member of F6KHM here in Brest, and we have a nice 10.30m dish, that we use for EME too. ;-)

Best regards,

Bruno - F8FIV
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