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Am335x usbmon runtime problems

Hi Guys,


we have a BBB based board, which was working with kernel 3.12.10-rt12, with some nasty issues regarding to

can-bus driver and suspend to ram functions and some usb-problems. So we decided to upgrade to kernel 3.18.11-rt7,

well now can seems to work pretty well, BUT usb behaves really strange.

if I start the board with plugged in WLAN-Stick, it will be detected during the start up of the kernel and even after start-up is everything OK.

But starting the board with plugged in USB-Flash-Stick will not work. That means lsusb shows nothing is plugged!!

And also plugging any kind of usb-device while the system is runnning does not work.

i tried to debug the usbmon, and saw that usbmon really does not recognize that any device is plugged in!!!


any idea what could be the reason for that strange behavior!!!

by the way there is no musb_hdrc in /proc/driver to see!!

Thnaks