[G Tablet General] s_frit:
[UPDATE: Problem solved: I had two versions of adb in my PATH and the old version (1.0.20) was being executed instead of the new version (1.0.26). Apparently the old adb silently fails and returns no devices when used in conjunction with the current drivers. I worked this out by accident. But if you're looking for ideas, there are lots in the ADB for Dummies thread: http://xdaforums.com/showthread.php?t=502010 ]

Hi All

I've been banging my head against this for hours with no luck. I can't get adb to recognise my gTablet. Here's what I've done:

I'm on WinXP. gTablet is running zTab Clean 3.0

- I've downloaded the latest ADB USB drivers using the Android tools (driver verion 4.0, December 12 2010).

- I've made the modifications to android_winusb.inf noted above.

- USB Debugging is enabled on the gTab

- adb_usb.ini contains a single line containing: 0x955

I've followed various instructions and the driver install ~seems~ to go ok, but adb doesn't work.

Windows Device Manager lists the following devices which are associated with NVIDIA Harmony:

Android Phone > Android Composite ADB Interface

Universal Serial Bus controllers > USB Composite Device

Universal Serial Bus controllers > USB Mass Storage Device

USBDeview lists three devices:

NVIDIA Harmony	NVIDIA Tegra 2 USB Device

NVIDIA Harmony	USB Mass Storage Device

NVIDIA Harmony	Android Composite ADB Interface

The first is listed as connected. The others aren't.

When run adb i get this:

> adb kill-server

> adb devices

* daemon not running. starting it now *

* daemon started successfully *

List of devices attached

No devices are listed.

I have tried many combinations of uninstalling these devices (with Device Manager and with USBDeview). When I reconnect I get prompted to install drivers. I have tried installing at this point, cancelling and then installing in Device Manager, not cancelling so the Plug and Play window stays open and uninstalling with device manager. None of this has worked. Also the device drivers seem to linger on my machine as they seem to auto-reinstall even after I have uninstalled them (I've also tried the suggestion of searching and deleting the .inf and .dlls from C:\Windows -- that didn't work out either).

I have also been careful to make sure adb is not running when I change the drivers. I have tried rebooting the computer and the gTablet after various installs.

The only way I can get the gTablet to appear in "Other devices" is to plug the device in (the PnP window pops up, I leave it open and ignore it). Then I delete the drivers in USBDeview. Then I unplug and replug the gTablet. Now there is one device in "Other devices": NVIDIA Harmony. Problem is, if I right-click "Update driver..." it won't let me install from the Android .inf, it says "The specified location does not provide information about your hardware." and forces me to install "USB Composite device". Once that's installed, two more NVIDIA Harmony devices appear in "Other devices". The first requires me to install "USB Mass Storage Device" (once again won't accept the .inf). The third does allow me to install "Android Composite ADB Interface". That gets me to the point where the drivers are loaded as listed above. But adb still lists no devices.

When I first started trying to set this up I had old drivers for the original HTC android phone installed. I deleted these with USBDeview.

I think that's all the information I have. Please let me know if you have any suggestions, I'd love to get this working.

Thanks!