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I have some trouble to connect a USB smart card reader on my Android Tablet (ICS 4.0.3). This one not recognized the reader. I used “USB device info” application, and I saw that Linux system can see the reader, but not android system (using USB Host API)
I tried to connect it on my Galaxy Nexus (Jelly bean 4.1.1) and it worked
Could someone help me, I can understood why my phone recognizes it, but not the tablet
Thanks
I suspect that the host feature may be disabled on your tablet.
I find this a little surprising as for the most part it tends to be enabled on tablets but I would certainly suggest that you check.
The following post is probably the best reference to look at as it is concise:
Android USB host and hidden devices
You ought to be able to see this via adb shell or by downloading a terminal emulator from google play.
I had exactly the same symptoms on my Sony Xperia neo phone running CM9. The rom would see the device but the API would not. Even supported devices such as a usb mouse would be detected and working but unseen by the api. This might be an easy way for you to ttest my theory. Plug in a USB mouse, it should work, does the API see it? If not then the thread above almost certainly relates to your issue in my experience.