Ubuntu

/dev/ttyUSB0 does not created in Feisty

Asked by Alvaro Isaza

I have a digital storage oscilloscope that is connected to the PC through a USB port, in Edgy it was working without problem, now I upgrede my PC to Feisty and It does not creates the device.
Nevertheless usbview list the scope correctly. It behaves like a USB to serial converter.

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Massimo Forti
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Revision history for this message
Massimo Forti (slackwarelife) said : 		#1

Afeter put in the usb port your ardware open a shell and do:

:$lsub

post the answer.

Thanks

Revision history for this message
Alvaro Isaza (alvaro-isaza) said : 		#2

Hi,

Thank You for your prompt response; the answer:

:~$ lsub
bash: lsub: command not found

But With lsusb the answer is:

Bus 002 Device 004: ID 0403:6001 Future Technology Devices
International, Ltd 8-bit FIFO
Bus 002 Device 002: ID 8086:1120 Intel Corp.
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000

Regards,

Alvaro Isaza

slackwarelife wrote:
> Your question #5503 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/5503
>
> Status: Open => Answered
>
> slackwarelife proposed the following answer:
> Afeter put in the usb port your ardware open a shell and do:
>
> :$lsub
>
> post the answer.
>
> Thanks
>
> _______________________________________________________________________
> If this answers your question, please go to the following page to let us
> know that it is solved:
> https://answers.launchpad.net/ubuntu/+question/5503/+confirm?answer_id=0
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/ubuntu/+question/5503
>

Revision history for this message
Massimo Forti (slackwarelife) said : 		#3

I need information about you device. You can post the name, the model ecc..

Thanks

Revision history for this message
Alvaro Isaza (alvaro-isaza) said : 		#4

The device is a Bitscope Model BS310U

webside: www.bitscope.net

The information from usbview:

BitScope 310
Manufacturer: METACHIP
Serial Number: BSCW7TUI
Speed: 12Mb/s (full)
USB Version: 2.00
Device Class: 00(>ifc )
Device Subclass: 00
Device Protocol: 00
Maximum Default Endpoint Size: 8
Number of Configurations: 1
Vendor Id: 0403
Product Id: 6001
Revision Number: 4.00

Config Number: 1
    Number of Interfaces: 1
    Attributes: c0
    MaxPower Needed: 0mA

    Interface Number: 0
        Name: (none)
        Alternate Number: 0
        Class: ff(vend.)
        Sub Class: 0
        Protocol: 0
        Number of Endpoints: 2

            Endpoint Address: 81
            Direction: in
            Attribute: 2
            Type: Bulk
            Max Packet Size: 64
            Interval: 0ms

            Endpoint Address: 02
            Direction: out
            Attribute: 2
            Type: Bulk
            Max Packet Size: 64
            Interval: 0ms

Thanks,

Alvaro Isaza

slackwarelife wrote:
> Your question #5503 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/5503
>
> Status: Open => Needs information
>
> slackwarelife requested for more information:
> I need information about you device. You can post the name, the model
> ecc..
>
> Thanks
>
> _______________________________________________________________________
> To answer this request for more information, you can either reply to
> this email or enter your reply at the following page:
> https://answers.launchpad.net/ubuntu/+question/5503
>

Revision history for this message
Massimo Forti (slackwarelife) said : 		#5

You can post the result of this command after you put in the devices:

sudo tail -f /var/log/messages

Thanks

Revision history for this message
Alvaro Isaza (alvaro-isaza) said : 		#6

The result:

sudo tail -f /var/log/messages

Apr 24 10:19:53 ingenieria kernel: [ 1886.997576] usb 2-2.2: usbfs:
process 3791 (brltty) did not claim interface 0 before use
Apr 24 10:19:58 ingenieria kernel: [ 1892.377468] usb 2-2.2: usbfs:
interface 0 claimed by usbfs while 'brltty' sets config #1
Apr 24 10:20:04 ingenieria kernel: [ 1897.749058] usb 2-2.2: usbfs:
interface 0 claimed by usbfs while 'brltty' sets config #1
Apr 24 10:20:04 ingenieria kernel: [ 1897.828886] usb 2-2.2: usbfs:
process 3791 (brltty) did not claim interface 0 before use
Apr 24 10:20:09 ingenieria kernel: [ 1903.140546] usb 2-2.2: usbfs:
interface 0 claimed by usbfs while 'brltty' sets config #1
Apr 24 10:20:09 ingenieria kernel: [ 1903.176136] usb 2-2.2: usbfs:
process 3791 (brltty) did not claim interface 0 before use
Apr 24 10:20:15 ingenieria kernel: [ 1908.512142] usb 2-2.2: usbfs:
interface 0 claimed by usbfs while 'brltty' sets config #1
Apr 24 10:20:15 ingenieria kernel: [ 1908.519535] usb 2-2.2: usbfs:
process 3791 (brltty) did not claim interface 0 before use
Apr 24 10:20:20 ingenieria kernel: [ 1913.903620] usb 2-2.2: usbfs:
interface 0 claimed by usbfs while 'brltty' sets config #1
Apr 24 10:20:20 ingenieria kernel: [ 1914.007132] usb 2-2.2: usbfs:
process 3791 (brltty) did not claim interface 0 before use
Apr 24 10:20:25 ingenieria kernel: [ 1919.295181] usb 2-2.2: usbfs:
interface 0 claimed by usbfs while 'brltty' sets config #1
Apr 24 10:20:25 ingenieria kernel: [ 1919.370636] usb 2-2.2: usbfs:
process 3791 (brltty) did not claim interface 0 before use
Apr 24 10:20:31 ingenieria kernel: [ 1924.666962] usb 2-2.2: usbfs:
interface 0 claimed by usbfs while 'brltty' sets config #1
Apr 24 10:20:31 ingenieria kernel: [ 1924.714585] usb 2-2.2: usbfs:
process 3791 (brltty) did not claim interface 0 before use

Regards,

Alvaro Isaza

slackwarelife wrote:
> Your question #5503 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/5503
>
> Status: Open => Answered
>
> slackwarelife proposed the following answer:
> You can post the result of this command after you put in the devices:
>
> sudo tail -f /var/log/messages
>
> Thanks
>
> _______________________________________________________________________
> If this answers your question, please go to the following page to let us
> know that it is solved:
> https://answers.launchpad.net/ubuntu/+question/5503/+confirm?answer_id=4
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/ubuntu/+question/5503
>

Revision history for this message
Massimo Forti (slackwarelife) said : 		#7

Try:

sudo apt.get install brltty

Say me

Revision history for this message
Best Massimo Forti (slackwarelife) said : 		#8

Sorry:

sudo apt-get uninstall brltty

In ubuntu.com forum this solve the problem "interface 0 claimed by usbfs while 'brltty' sets config #1"

Say me

Revision history for this message
Alvaro Isaza (alvaro-isaza) said : 		#9

Thank you very much, now it is working.

Regards,

Alvaro Isaza

Revision history for this message
ArbitraryConstant (anthony-spamtrap) said : 		#10

"sudo apt-get remove brltty" worked for me as well.

Revision history for this message
ironfisher (dgvalde) said : 		#11

This problem is happening again in Ubuntu 11.10.

Something must be done because this is not normal. It's really annoying having to figure out what the problem is every time you use a USB UART device. And even more annoying to find the problem and find this solution.

I took me about 4 hours to find and solve this problem, even I am related to computers, Ubuntu and Linux. Imagine how annoying it is for anyone not related to linux and how many devices using UART through USB there are.

Let's deactivate BRLTTY default or contact with BRLTTY developers to not claim the USB interface by default.

Revision history for this message
acognard (arnaud-cognard) said : 		#12

Hi all, how can i apply this on a ddwrt system ?

Many Tks.
Arnaud