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  1. Device /dev/ttyUSB2 is locked
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Device /dev/ttyUSB2 is locked

My GSM modem is attached to ttyUSB2 port but I am not able to access the port for AT commands. When I try to access it I get an error as below:

$ sudo minicom Device /dev/ttyUSB2 is locked.

2 Answers 2

Do ps -ef and see if there is any minicom -s process running.

If there is then kill that process with kill -9 pid where pid is the PID number given in the output of ps -ef . It will solve your problem.

Read man minicom . It says. in part:

 B - Lock file location On most systems This should be /usr/spool/uucp. GNU/Linux systems use /var/lock. If this directory does not exist, minicom will not attempt to use lockfiles.

So, look for lock files in /var/lock or /usr/spool/uucp

/var/lock directory exists already and it has following files- .asound.state.lock LCK..ttyUSB2 ntpdate subsys whoopsie

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Thread: Device is locked (multiple serial connections to one device)

Mikkelsen is offlineFirst Cup of Ubuntu

Device is locked (multiple serial connections to one device)

When I am online with my 3G modem I am not able to get connection to the modem with minicom or any other program because it is locked.

«Device /dev/ttyUSB3 is locked.»

Is there somehow a solution so that I can use the 3G modem in multiple programs?
I want to be online with the modem and still be able to read/write sms with a program or minicom terminal.

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Thread: /dev/ttyUSB* is getting locked

shariefbe is offlineFrothy Coffee!

Join Date Nov 2008 Location Trichy,India Beans 217 —> Beans 217 Distro Ubuntu 10.10 Maverick Meerkat

/dev/ttyUSB* is getting locked

Device /dev/ttyUSB0 is locked. sharief@sharief-desktop:~$
sharief@sharief-desktop:/var/lock$ ls sharief@sharief-desktop:/var/lock$
sharief@sharief-desktop:/var/tmp$ ls motd.tail.swp sharief@sharief-desktop:/var/tmp$
sharief@sharief-desktop:/tmp$ ls keyring-gh9KXe orbit-sharief pulse-PKdhtXMmr18n pulse-z0Fis1zFYvrJ seahorse-OZ5gwy ssh-FtAuvo3036 virtual-sharief.Vcp4dL sharief@sharief-desktop:/tmp$

So please help me. what will be the problem. Sometimes it is working but after sometime it is getting locked. Please help me

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