I have a really "weird" question.
We have to connect a lot of USB's devices (Android phones) on a PC thus we are using three USB hubs (we are also using adapters to power the hubs) and three USB ports for the HUBS. We also use another USB port for keyboard and another one for the mouse.
The problem is that when I try to connect more than 15 phones on the hubs the PC become unstable. ( I tried first with Windows 7 and then CentOS as the host OS) Even if the devices perform really well on CentOS I cannot connect more than 15.
The question is:
How can I check if there is a hardware limitation regarding the number of USB devices I can connect to the PC? And if there is a limitation can I overcome it?
Finally, I would like to ask if there is any software that I can use to log/monitor any problems regarding the USB connection.