Help! Kernel sees external pen device, but Android doesn't ? - Android Q&A, Help & Troubleshooting

Hi, (Edited with merged post below and new information.)
I have an Onda Vi140 10" tablet and the capacitive touchscreen is useless for real writing apps.
Is there any way to add a graphics tablet like Wacom to Android via USB?
I know they work in Linux, but I wouldn't have a clue how to port a driver to Android.
Is there a technical (battery drain?) reason why this isn't feasible?
I've searched the web and trawled through countless pages, so whether I'm searching wrong, or it's an option only a few people would want and therefore of no interest, I'm not sure.
There are a few questions dotted around the web, but no answers.
For me, I'm about to buy an A5 tablet for Photoshop, so slipping it into my android sleeve and using it in meetings would be a bonus.
If it's just drivers, maybe someone would know how to try? I just need the basic writing ability. All other features wouldn't be needed, or supported by apps.
Any advice would be appreciated.
David.
Sorry if this is in the wrong thread, but although not specific to my device, the earlier thread mentions a specific area of Android I'm interested in. If it's in the wrong place, please post it here - where I've so far had no luck. I don't want to double-post. Here, user d10221 seems to know what he's doing.
d10221 said:
The Manhattan/WALTOP tablet din't work "plug&pray" with 3.2, or 4.0 (HC, ICS)
it needed to be setup first...
Click to expand...
Click to collapse
From this earlier post in this thread by user d10221 it seems that an external USB HID compliant graphics tablet might work.
1) I have a cheap graphics tablet which appears to be HID compliant and works as a mouse in Windows & without drivers.
2) My HID compliant mouse works perfectly on my ICS tablet.
Does anyone know why, if it's HID compliant, the pen/tablet is recognised in WIn7, but not in Android; but a similarly compliant mouse does?
I just need the mouse functions.
My /proc/bus/input shows:
I: Bus=0019 Vendor=0001 Product=0001 Version=0100
N: Name="sun4i-keyboard"
P: Phys=sun4ikbd/input0
S: Sysfs=/devices/virtual/input/input0
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=3
B: KEY=2000000 0 800 c0040 0 0 10000002
I: Bus=0019 Vendor=0001 Product=0001 Version=0100
N: Name="axp20-supplyer"
P: Phys=m1kbd/input2
S: Sysfs=/devices/platform/sun4i-i2c.0/i2c-0/0-0034/axp20-supplyer.28/input/input1
U: Uniq=
H: Handlers=kbd event1
B: PROP=0
B: EV=7
B: KEY=100000 0 0 0
B: REL=0
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="ft5x_ts"
P: Phys=
S: Sysfs=/devices/virtual/input/input2
U: Uniq=
H: Handlers=event2
B: PROP=0
B: EV=b
B: KEY=400 0 0 0 0 0 0 0 0 0 0
B: ABS=2650000 0
I: Bus=0018 Vendor=0000 Product=0000 Version=0000
N: Name="mma7660"
P: Phys=
S: Sysfs=/devices/virtual/input/input3
U: Uniq=
H: Handlers=js0 event3
B: PROP=0
B: EV=9
B: ABS=7
Which, as far as I can tell, are all standard devices from the tablet. So, I'm guessing ICS isn't picking the HID drawing tablet up in the same way as windows.
Anyone any ideas? Can I force Android to look and set it up this way? I dabble a bit in Ubuntu and have already modified my Onda Vi40 tablet to read/write to my external TF and USB sticks. However, I'm lost - although I think it may be possible.
Thanks for any help in advance.
David.
Update edit:
Using this USB scanning App I got this:
Device List 1-1
Device Info
Device Path: /sys/bus/usb/devices/1-1/
Device Class: Use class information in the Interface Descriptors (0x0)
Vendor ID: 0b57
Vendor Name (reported): Han Wang Technoloy Center
Vendor Name (from DB): Beijing HanwangTechnology Co., Ltd
Product ID: 8004
Product Name (reported): JB8 USB Tablet
Product Name (from DB): not in db
Additional Info
USB Version: 1.00
Speed: 1.5
Protocol: 00
Maximum Power: 40mA
Serial Number:
The Android scan option found nothing: This is from the Linux Kernel scan.
So, it seems the Linux Kernel finds something, but not Android.
Am I any closer?
David. Edit: (Thanks mods for merging these posts.)

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first: find out if your android device supports to act as a USB-host at all.
for drivers you wan hope for it to be detected as a normal mouse und use it with any sketch app I suppose.
If you use it at home only, maybe there is an app to use your computers pointer as a mouse on the android through wifi.

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cougarten said:
first: find out if your android device supports to act as a USB-host at all.
for drivers you wan hope for it to be detected as a normal mouse und use it with any sketch app I suppose.
If you use it at home only, maybe there is an app to use your computers pointer as a mouse on the android through wifi.
Click to expand...
Click to collapse
My device supports a mouse - thank you. So basic sketchpads should work if they have Android/Linux drivers? Or with the built-in mouse drivers?
Thanks very much for your comments and help.
David.

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I tried a Wacom tablet on my phone which has USB host support. It was recognized, but I could not use it as an input device. You might have better luck with your tablet/tablet combination.

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*Bump* as there's more information from a merged thread after lots of digging.
Still stumped, but does the new info in the OP help?
David.

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Graphic tablet wasn't like generic-input device, it seems.
I'd like to use wacom bamboo tablet on acer a500 tablet.
So when I connected to a500, light was on but it doesn't do anything.
Of course, I also tried my usb keyboard and mice and also wireless keyboard and mice. And also usb memory stick and external hard disk. It worked them all. But wacom bamboo tablet doesn't work.
Anyway, I've got other information from articles here.
[Q] USB Pen Tablet like Wacom Bamboo Tablet work on Android?
http://forum.xda-developers.com/showthread.php?t=1447905
Use USB Tablet Pen such as Wacom with Prime
http://forum.xda-developers.com/showthread.php?t=1591872
And interesting thing is plurch said that it worked on Nexus 7. You can find plurch's post in first link.
Thank you.