I've got a cheap Android device, and I can't connect it to my Ubuntu 11.10 laptop via USB. When I connect the USB cable, I don't see any notification on the Android, and nothing appears in the list of devices from `adb`.

```
$ ./adb devices
List of devices attached 

$

```

When I run `lsusb` before connecting the device and after, I see no new USB devices.

The device is running Android 4.0.3, and I enabled USB debugging under Settings: System: Developer options.

I tried following the instructions for [configuring USB rules](http://developer.android.com/tools/device.html) under `/etc/udev/rules.d/`, but I don't know the vendor id for my device. I wrote a small program to display `android.os.Build.MANUFACTURER`, but it was "unknown". `android.os.Build.MODEL` was "P90", so I think I have a P90 from T&R as discussed in [this forum](http://www.slatedroid.com/topic/31562-eken-a90-advanced-97-ips-8000mah-battery/page__st__420), or maybe from Eken. I tried using Google's vendor id as [suggested here](https://stackoverflow.com/a/9608812/4794), but it didn't change anything.

I will try another cable, but until I get my hands on a new cable, is there anything else I can try?