On 28/05/13 09:23, the mail apparently from Christoffer Dall included:
[...]
I noticed that on this laptop with USB3 ports, AEP won't work plugged in direct (LMP, using a similar NXP chip are the same). They need to be connected via a USB2 hub in order to work. Maybe that's something to do with it.Are you by any chance running from within a VM on a mac? I've seen similar behavior in that scenario.
Also, have you tried running as sudo just to verify it's not a permission issue? I seem to remember this happening for me once in a while too when I was running power measurements, and only some combination of fully resetting the probe and booting the machine did the trick, for whatever it's worth.
It's x86_64 Fedora directly on an Intel laptop with only 2 x USB3 ports, with a rawhide 3.10-rc"0" kernel. It's quite possible it's a quirk of the driver for that particular host controller, but there is no problem via even a very cheap USB2 hub.
About root yes depending what groups your user is in or what udev has got, you need to run arm-probe or aepd as root just to access the ttyACM.
-Andy