I am working with about 1000 Asus Nexus 7 tablets which normally get charged/stored in charging carts that can hold 48 tablets at a time. The carts each have a USB port under a cradle that the tablet simply slips into on its side. One end of a USB cable is plugged into the USB slot just under the cradle slot, and the microUSB end plugs into the tablet itself.
The cradles are all wired to a master USB hub within the cart with USB cable and plug protruding out the side. Now, using any older Macbook Pro/Air (take a MacBook Pro 1,1 for example), and we plug the USB cable from the cart into the USB port of this Pro, cart is plugged into the wall, all tablets are powered on and successfully charging/connected to the cradle, have a terminal window open and issue adb devices, all 48 tablets in that cart are seen and can be successfully interacted with. Same is true of a similar-vintage MacBook Air laptops. Take a present-day MacBook Pro or Air, and try it again. adb devices only sees 8 devices, even if all 48 are plugged in. We have tried this on all the carts we have and have the same results. We have tried the latest version of adb with the same results. Is it an issue with adb or with the USB chips used in older vs newer Mac laptops? We also use some other software along with adb that is designed for Macs, hence our reliance on Macs for doing this. Thanks for your insights on how to break the 8 device barrier using adb on newer Macs, if this is possible. Scott _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
