USB locked by PID 2336, failed to aquire lock

[Felix N]

Hello,

I now successfully installed ola but cannot start the deamon correctly via olad -l 3
I keep getting the error message:

plugins/usbpro/WidgetDetectorThread.cpp:215: Found potential USB Serial device at /dev/ttyUSB0
common/io/Serial.cpp:170: Device /dev/ttyUSB0 locked by PID 2336 and process exists, failed to acquire lock

Is that an issue with the plugin usbpro? How can i manage enable/disable plugins?

I want to control my Eurolite DMX512-Pro USB to DMX adapter via python.

Thanks in advance and best regards,

Felix

[Felix N]

Followed these steps and now I can at least run the olad -l 3 without error messages.

https://groups.google.com/g/open-lighting/c/rDIbzhqnWxQ/m/QTFLq7N-BAAJ

[parth sanepara]

Hi all,

Same issue i found with my RPI3 and I have USB to RS485 converter(Model - 485USBTB-2W-LS) and connect with DMX input Port. I have custom DMX RGB light. 

I have installed successfully olad version 0.10.9. 

which file .conf i need to enable and disable. i have try enable  ola-ftdidmx.conf and disable  ola-usbserial.conf and  ola-opendmx.conf plugins 

still same issue: Device /dev/ttyUSB0 locked by PID 1691 and process exists, failed to acquire lock.

is there any other settings required please let me know.

Thanks

[Peter Newman]

Both, can we have olad -l 4 logs:

https://www.openlighting.org/ola/get-help/ola-faq/#How_do_I_get_olad_-l_4_logs

And:

lsusb -v

And:

ps aux

Or (where 1234 is the PID is says is locking it):

ps aux | grep -i 1234