i have a Problem, that is going to drive me grazy and need help:
My Project is a 3G Webcam, so i attached a picam and a Huawei e169 3G dongle to a Pi Model B (Raspbian). Everything worked fine. Then i moved the SD-Card and the dongle to a Model A. Again everything worked fine.
A few days ago, i did a sudo update, sudo upgrade on that Model A.
After that, the 3G Dongle is not recognized any more: It is not even listed in lsusb at all, while dmesg shows no errors. Any other USB device works on that USB port (e.g. wifi, keyboard,...)
When i move the SD Card and the same dongle back to the model B, it works !.
When i connect the 3G dongle over an un(!)powered hub to the Model A, it works also !
But it doesn't work if it is directly connectet to the Model A's USB port.
Do i have to reconfigure something when i move an SD-Card from a Model B to Model A ? I know, that USB support on those models is slightly different.