Ubuntu
modemmanager package

Modem Manager Locks Dual FTDI Serial Ports

Asked by Ash Charles

I'm trying to connect serial console to an embedded device and but I'm not able to connect for the first 36 seconds after connection as modem-manager has locked the /dev/ttyUSB1 file (as shown by '$ sudo lsof /dev/ttyUSB1'). By blacklisting the USB ID (0403:6010) of the device in the '77-mm-usb-devices-blacklist.rhles' udev rule, I can immediately access the device.

Much like the commonly used single FTDI USB-serial converter chip (USD ID 0403:6001) that is blacklisted in this file "77-mm-usb-device-blacklist.rules", I think the dual version (USB ID 0403:6010) chould also be added as it is commonly used in JTAG debugged boards and embedded devices.

I would like to submit a patch but I'm not quite sure where to send it....sorry :(.

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Ubuntu modemmanager Edit question
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Solved by:
actionparsnip
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Revision history for this message
N1ck 7h0m4d4k15 (nicktux) said : 		#1

Close this question (solved) and open a bug report.

There you can submit patches.. etc.. to speak with the developers.

Thank you.

Revision history for this message
Best actionparsnip (andrew-woodhead666) said : 		#2

Run:

ubuntu-bug modemmanager

And report the bug :). The patch will then be included by default and more things will work out of the box. Great work!

Revision history for this message
Ash Charles (ashcharles) said : 		#3

Thanks actionparsnip, that solved my question.

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Ash Charles (ashcharles) said : 		#4

linked bug Bug #1094138