You might try disabling USB autosuspend (there are a lot of USB devices which do not handle autosuspend well). Adding “usbcore.autosuspend=-1” to the kernel command line should be enough to test this with. For example, add this to the “/boot/extlinux/extlinux.conf” APPEND key/value pair:
APPEND ${cbootargs} usbcore.autosuspend=-1
If this works you could put it in the device tree “chosen->bootargs” node. However you add this, just verify it shows up in:
cat /proc/cpuinfo