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Cannot Open /dev/ttyusb0 Device Or Resource Busy

Redhat has a dialer applet that you can add to the gnome panel that uses the wvdial prog. Trying to use a 12 V incandescent light bulb is not a good idea. For a Text-Terminal much of the info here will be of value as well as the troubleshooting info in Text-Terminal-HOWTO. 16.1 Serial Electrical Test Equipment Breakout Gadgets, etc. The first time I did this,and booted the raspberry pi, i got many beeps and scrolling blank spaces (eg there was some sort of connection, good). http://ecoflashapps.com/cannot-open/cannot-open-dev-ttyusb0-device-or-resource-busy-ubuntu.html

You may need to use setserial to tell Linux the IRQ you are using. 16.9 "Cannot open /dev/ttyS?: Device or resource busy See /dev/tty? See Which Connector on the Back of my PC is ttyS1, etc? Trying to use other methods for checking voltage is tricky. A store chain named "Active Components" may have them.

And how do I find out the reason for this error? A more accurate error message would be ``Can't use ttyS2 since the setserial data (and kernel data) indicates that another device is using ttyS2's interrupt''. While a multimeter (used as a voltmeter) may be all that you need for just a few serial ports, simple special test equipment has been made for testing serial port lines.

Setserial has it wrong and the only reason ttyS2 can't be used is that setserial erroneously predicts a conflict. Click Here to join Tek-Tips and talk with other members! A 470 ohm resistor is used for a 20 ma LED (but not all LED's are 20 ma). ATDT 1234-8300 CONNECT 57600 --> Carrier detected.

As root, just execute: chmod 666 /dev/ttyS0 and see if that fixes it. To force loading of the "serial" module it may be listed in the file: /etc/modules.conf or /etc/modules. Others have LED lamps which light when certain modem control lines are asserted (turned on). http://www.tek-tips.com/viewthread.cfm?qid=489496 Cancel Red Flag SubmittedThank you for helping keep Tek-Tips Forums free from inappropriate posts.The Tek-Tips staff will check this out and take appropriate action.

Apart from that, maybe you can find a working configuration by googling for your provider and "wvdial". Online at:Twit | Facebook | BlogRegistered Linux user #469726 Offline #8 2010-06-09 00:50:19 dejavu Member Registered: 2008-05-26 Posts: 103 Re: [SOLVED] HSDPA Huawei E220 and wvdial: Device or resource busy It Some have test points for connecting a voltmeter. Obviously, my modem was not detected right, because lshal output did not show modem.command_sets key at all.- After spending some time looking for culprits, I had found out that two files

By joining you are opting in to receive e-mail. http://benimana.blogspot.com/2011/06/your-huwawei-modem-is-giving-error.html The actual module should reside in: /lib/modules/.../misc/serial.o. 16.13 "Cannot create lockfile. Twice as many characters get received than were sent. See section Serial Monitoring/Diagnostics 16.3 (The following subsections are in both the Serial and Modem HOWTOs) 16.4 Serial Port Can't be Found There are 3 possibilities: Your port is disabled since

The time now is 02:19 AM. weblink login...bla pass...blactrl +azthen q to quit without resetand run the pppd daemonsee what happeneds =-=-=-=-=-=-=-=-=-=-=-=Unix Systems Engineer=-=-=-=-=-=-=-=-=-=-=-= RE: Cannot open /dev/ttyS0: Device or resource busy timsr (MIS) 3 Mar 03 08:35 vBulletin 2000 - 2016, Jelsoft Enterprises Ltd. Right click on the panel or look in various places or look in the meny for something called "Applet" or "Applets" and choose to add to panel -> Network->RH PPP Dialer.

Some programs change the permissions when they run but restore them when the program exists normally. Hide Question All replies Helpful answers by Sefi G,★Helpful Sefi G Jun 14, 2014 8:38 PM in response to Les 76 Level 1 (5 points) Jun 14, 2014 8:38 PM in You might also want to double check that any suspicious IRQs shown here (and by "setserial") are correct (the same as set in the hardware). navigate here busy" error message.

Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden.Tek-Tips Posting Policies Jobs Jobs from Indeed What: Where: jobs by Link To This Forum! If this seems to fix the "slow" problem then you had an interrupt problem. If this test gives you a shock, you certainly don't want to use your tongue.

Modem detection is done via HAL, which scans /usr/share/hal/fdi/information/10freedesktop/10-modem.fdi to identify the vendor and the model.

Code: [Modem0] Modem = /dev/ttyS2 Baud = 115200 Init1 = ATZ Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 S11=55 +FCLASS=0 [Dialer Defaults] Modem = /dev/ttyS2 Baud = 57600 Init1 = Not the answer you're looking for? Please read the FAQ at http://open.nit.ca/wiki/?WvDial If you still have problems, send mail to . Sorry" Sometimes when it can't create a lockfile you get the erroneous message: "...

The setup script (also included in the archive) installs the HAL and Udev rules which help identify the modem right, and, in a way, these two prevent HAL from setting the Apple may provide or recommend responses as a possible solution based on the information provided; every potential issue may involve several factors not detailed in the conversations captured in an electronic Even if a device is powered on and connected to a port, it may sometimes prevent opening the port. his comment is here I'd never think of that, you are probably the only one who can understand the amount of work you got me rid of.Ok, now I only have to find out how

So I had to:# mkdir /var/lock- Now wvdial (supplied with correct /etc/wvdial.conf, of course) could estabilish a connection when run as root. Jun 14, 2014 1:38 PM Helpful (5) Reply options Link to this post Apple Footer This site contains user submitted content, comments and opinions and is for informational purposes only. You should also be able to find it with the "setserial" command for ttyS2. If you think that "setserial" has it wrong check it out.

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