Downstream port 0 is OFF
Closed this issue · 3 comments
Hello,
I'm facing an issue with the YKUSH board connected to a Debian jessie apu2 board.
The board works perfectly in an Ubuntu computer, however when i plug it in the apu2,
i can see the device with "sudo ./ykushcmd -l", but i'm getting:
"Downstream port 0 is OFF"
when i'm trying to do other up/down processes to any port (e.g. "sudo ./ykushcmd -g 1").
Any ideas? Is it possible the usb hub to be locked somehow?
Hi Marios,
if you can see the board using the ykushcmd -l command then the board is correctly attached to the host and it is not "locked down".
The issue seams to be on the software/host side which is not claiming the YKUSH control device. Did you build the application on Debian using the build.sh script?
Thanks.
Best Regards.
Yes of course and with the same procedure, i have built the application on a different Ubuntu computer and it is working fine.
This "Downstream port 0 is OFF" message is the message i also get when i am trying to up/down a non-available port (e.g. 4,5,6) in Ubuntu computer, that's why i thought that something could be blocked or locked in Debian.
Thanks.
I finally figure it out.
There was another program (called usb-monitor) running by default in Debian apu and that was causing the problem.
Thank you.