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[Q] xoom touchscreen issues?

I got my Xoom (WiFi) yesterday... already noticing some weird touchscreen behaviour.
It seems to me that whenever the Xoom is laid down flat, there's a chance that the device will stop responding to touch presses properly. Instead of being able to press-and-swipe, it acts like I tapped the screen (eg, pressed my finger on the screen and then lifted it straight back off) or worse, it causes a screen press in completely the wrong position. When it starts happening, it keeps on happening, but picking the Xoom up and holding it vertical seems to fix the problem.
Half the time it seems fine laid down though, so I'm not sure if it's just coincidence that it stops working at the same time I put it down flat or not, or that maybe picking it up means my hand is in contact with the back of the screen and this somehow changes some sort of electrical variable in my hands that affects the touchscreen operation.
Anyone else seen the same issue? I'm thinking I may need to take it back but want to see if anyone else has experienced anything similar.
Chris.

ok.. judging by the lack of response on this, I may either be on my own or it's just something that nobody is noticing. I've been testing it a bit more - I wrote an app which can show each touch point on the screen so I can see how the screen press/drag is working. This is what I've found.
Holding the tablet upright, screen presses and movements are fine, however I've noticed that if I hold my fingers in the same place for a while, the touch points will prematurely end.
If I put the Xoom down on the couch, there is a strong likelihood that the touchscreen will become incredibly unresponsive. I have had it regularly show up phantom presses where touching one point of the screen makes it appear as if I have also pressed another point of the screen. I also cannot drag my fingers across the screen - the touch points stay where they are until I take my fingers off the screen completely, or they just disappear right away as if I tapped the screen.
When this happens, if I touch the side of the case with either a free finger or my other hand, the touchscreen starts working perfectly! Seriously! I'm not kidding, I've been messing with this thing almost non-stop for the past coulpe of days and it is consistently doing this. So - couch + little finger on side of case = working touchscreen. couch but no contact with metal case = malfunctioning touchscreen.
If I have the Xoom in Motorola's case, it seems to work fine. If I put it on a table, it's a bit buggy but generally works better than on the couch. Any sort of material seems to send it regularly into crazy mode. The only time I've noticed it doesn't do this is if I'm in contact with the device immediately before putting it down and then remain in contact with the screen.
Could some sort of static charge cause this? Is it possible that me touching the back of the case is effectively allowing it to 'conduct' electricity properly on the touch screen? I'm not all that familiar with how capacitative screens work other than I assume they measure capacitance from your fingers. Maybe a static charge could throw it off. Or maybe I have weird fingers.
Anyway, I'm pretty close to taking the Xoom back now. Just trying to figure out if it's actually faulty or whether they're all like it by 'design'.

sorry
need to post to remove my limitations sorry again

This could be a loose touch controller cable. Someone had similar problems and posted a how to fix this, search for it.

It happens with me too, it's incredible annoying when you are developing and the tablet is on your table for debugging..
Did you find how to fix it?

I have a serious unresponsive issue on my Xoom when charging. I've tried several different chargers, (all from Motorola) with no luck. Unfortunately all the ones I tried where at my house so I'm not sure if its a wiring issue in my house.
I also have a similar problem on my Droid Razr so I'm starting to think its definitely the wiring.
Anyone know about this issue or have any recommendations?

kiroiv said:
I have a serious unresponsive issue on my Xoom when charging. I've tried several different chargers, (all from Motorola) with no luck. Unfortunately all the ones I tried where at my house so I'm not sure if its a wiring issue in my house.
I also have a similar problem on my Droid Razr so I'm starting to think its definitely the wiring.
Anyone know about this issue or have any recommendations?
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Click to collapse
Thats weird.. i owned xoom n droid razr too but i dun have any iissue

It could be a wiring issue (try another house, I guess), but a lot of devices are like that where the touch screen stops being as responsive when it's on a wall charger.

[Q] screen activation

1st, I'm spanish I'll try you understand what I say
I see that the tablet with the screen off (locked) can be activated without pressing the power button. Only need to put "near the dock"*
*making like you open the tablet+dock, but is not needed that the tablet was connected with the dock, I dnt know if someone else was noticed that... but I'm a bit curious about that and i want to know how its work? (magnet?, gyroscope?, magnet+gyroscope?) if someone knows it
and I say it to other people that dnt now this, THANKS
SOLVED MISTERY!
Like some says here its a magnet near the backspace key, exactly the "¿/¡" key
here is a really good cover mod idea: http://forum.xda-developers.com/showthread.php?t=1507548 thanks to MrNago

nobody has any idea?

I think there is a switch in the hinge maybe? Seems that would be the easiest way to have the screen turn on while opening the lid while its on the dock.

I test one more time and I noticed that the system is only at the right side of the tablet and dock, like u see in this image. And its not needed any contact, but it need tablet and dock really near.
I think is a magnet system, but i havent any magnets at home to make a try...
edit: i have an error in the image, looking the camera i can see that the tablet is in the wrong side, we must see the camera down. Not at the top like in the image xD

ww.youtube.com/watch?v=k-6dKsGJ4VY
I see nothing in this disassembly to make this activation, this is curious, i want too know how it works

turning on via opening.
i tried looking using a magnetic viewer screen there are several places in the screen and in the keyboard that show magnetism, on the screen the two speakers are the main places and in the keyboard below the backspace key is quite strong as well.
i tried replicating the action using a strong magnet but i could not get it to work only when help above the keyboard does it work so there may be more then one place it looks at, i will try again when i have more time and then post results.

Interesting discovery! I don't thnk anyone actually tried this, though many speculated there were magnets in the base, many users said (and I agreed at the time) that the mechanism to wake the device was located in the hinge, though having a function like this actually does make more sense than an actual hardware switch that could fail at some point.
You should make a video and I will add this information to my epic noob thread!

thanks for replies, i tried with a small magnet without results, and try in other positions with the dock and negative results too...
I'm sure that the magnet of the backspace key its the "switch" or one of them, they are 2 maybe....

Guessing here, probably not just a magnet, maybe even an RFID chip of some sort..

Its a magnet that does this. Don't doubt. Believe. Removing the magnet and putting it back in is part of my hard drive soldering procedure.

it is a microswitch in the hinge, all experimentation I have done supports this, the only thing left for me to do is pull apart my dock and take high res pictures of the microswitch seeing as you all seem to need proof of it

lilstevie said:
it is a microswitch in the hinge, all experimentation I have done supports this, the only thing left for me to do is pull apart my dock and take high res pictures of the microswitch seeing as you all seem to need proof of it
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Click to collapse
Stevie, i did think so as well, but the device will wakewhen placed on the dock and removed even if it is not affixed in the hinges and even if the hinge does not move, i don't think you are getting what poster is saying, i will make a video myself and post to demonstrate.
HERE
Thereis also probably a switch in the hinge as well for sure, but this does seem important information, wonder what the mechanisms in the body of the tf are..i enjoy solid state switches like this

Oddly enough this is confirmed using Paul's ICS and my dock not connected. Totally bypassed the lockscreen. Held it as close as I could for about 5-7 seconds then on came the screen. Tried this at least 10 times (five of which I just was amazed) and everytime opened right up. Nice catch:thumbup:
Sent from my Ice Creamified Transformer TF101 using Tapatalk

You guys are right, there is some kind of magnet. For those that doubt it, like I did, try this:
First off, undock the tablet, so that you have the 2 items apart.
1. Lock the tablet, so that the screen is off.
2. On the dock, rotate the hinge outwards, so that you can put together tablet+keyboard without docking.
3. Actually put them together, so that their position is exactly the same as docked, except they aren't.
4. Screen should turn on. Mine certainly does!
Edit: as you can see, there is no connected circuitry between them and the tablet is waking up. Don't know about locking though, but I hope this gets things clearer and Modding nearer!

MrNago said:
You guys are right, there is some kind of magnet. For those that doubt it, like I did, try this:
First off, undock the tablet, so that you have the 2 items apart.
1. Lock the tablet, so that the screen is off.
2. On the dock, rotate the hinge outwards, so that you can put together tablet+keyboard without docking.
3. Actually put them together, so that their position is exactly the same as docked, except they aren't.
4. Screen should turn on. Mine certainly does!
Edit: as you can see, there is no connected circuitry between them and the tablet is waking up. Don't know about locking though, but I hope this gets things clearer and Modding nearer!
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Click to collapse
This is the same way to unlock that Im saying since the first post. Only need to test to know what kind/power/number of magnets or "sensor" is needed
Enviado desde mi Transformer TF101 usando Tapatalk

Here, I found it out
I opened a DIY thread: [DIY] SmartAss Cover for your Asus TF101

Did I break it or is this standard (dock issue)

Well been studying movies on the innards of the TF700T (haven't touched mine yet for that tho!). And I noticed some "brackets" on the connection end of the tablet to the dock, with this I noticed I don't have them on mine.
Now... this wouldn't be a issue but lately the tablet seems to fall out of the dock very easily. It's not that it's loose or anything but well not locked. Not a nightmare, but I had some near accidents due to this several times (picking it up and the keyboard falling off or the other way around). So well it got me wondering, are those brackets broken for me? Or is this standard?

djmulder said:
Well been studying movies on the innards of the TF700T (haven't touched mine yet for that tho!). And I noticed some "brackets" on the connection end of the tablet to the dock, with this I noticed I don't have them on mine.
Now... this wouldn't be a issue but lately the tablet seems to fall out of the dock very easily. It's not that it's loose or anything but well not locked. Not a nightmare, but I had some near accidents due to this several times (picking it up and the keyboard falling off or the other way around). So well it got me wondering, are those brackets broken for me? Or is this standard?
Click to expand...
Click to collapse
Are you talking about the black plastic plugs that "plug" the connector holes to keep dirt out? Even if you had them you'd need to remove them to use the dock. Some dock/tablet combos do not lock just by pushing them together(well documented here) and you need to manually pull the tablet lock switch into position.

djmulder said:
Well been studying movies on the innards of the TF700T (haven't touched mine yet for that tho!). And I noticed some "brackets" on the connection end of the tablet to the dock, with this I noticed I don't have them on mine.
Now... this wouldn't be a issue but lately the tablet seems to fall out of the dock very easily. It's not that it's loose or anything but well not locked. Not a nightmare, but I had some near accidents due to this several times (picking it up and the keyboard falling off or the other way around). So well it got me wondering, are those brackets broken for me? Or is this standard?
Click to expand...
Click to collapse
Mine no longer docks securely at all, so I double-sided-taped it to the dock. Known issue, and it happens with little use of the docking mechanism per se. More and more people are reporting exactly this, and ASUS washes its hands in innocence... :S

Make sure the lock switch reaches the end, if not then its not fully secure. Theres a problem with the keyboard where the little tab that the tablet is suppose to push down when docked doesn't get pushed down because it can't reach it. Thats why when you hold the tablet part the dock would fall right off. Use a pen and play with that little tab and you will see the black slot locker. I'm thinking of finding something to stuff it so that when i dock the tablet and the extra thing i add would push the tab down and lock fully.

destroyer333 said:
Make sure the lock switch reaches the end, if not then its not fully secure. Theres a problem with the keyboard where the little tab that the tablet is suppose to push down when docked doesn't get pushed down because it can't reach it. Thats why when you hold the tablet part the dock would fall right off. Use a pen and play with that little tab and you will see the black slot locker. I'm thinking of finding something to stuff it so that when i dock the tablet and the extra thing i add would push the tab down and lock fully.
Click to expand...
Click to collapse
Both these little black have completely broken off on my dock -- no rescueing possible by pushing whatever other part.

MartyHulskemper said:
Mine no longer docks securely at all, so I double-sided-taped it to the dock. Known issue, and it happens with little use of the docking mechanism per se. More and more people are reporting exactly this, and ASUS washes its hands in innocence... :S
Click to expand...
Click to collapse
Ouch well that's dissapointing
thx I guess I'm gonna have to figure out a similar solution to yours

TF101 Keyboard Problem: Keyboard Keys Not Working

My TF101 is running KatKiss 4.4.4_035. When I plug in the dock (physical keyboard) only the mouse keys and mouse pad work, none of the keys on the keyboard do anything. Does anyone have any ideas on how I can get the entire keyboard working?

Never mind. I spent more time trying to figure this out, and discovered that it is a hardware issue. The dock keyboard works only when the screen is tilted in the dock at certain angles. Unfortunately for me, those angles are when the screen is more closed than open.

kc27 said:
Never mind. I spent more time trying to figure this out, and discovered that it is a hardware issue. The dock keyboard works only when the screen is tilted in the dock at certain angles. Unfortunately for me, those angles are when the screen is more closed than open.
Click to expand...
Click to collapse
Sounds like a connection issue between tablet and dock, might be worth checking inside each sides port/socket for any obvious problem
Might be something simple that can just be pushed back together

My keyboard has a similar problem. Altought in my case only some keys don't respond correctly. I think this might be a kernel problem.

Keyboard dock issues - katkiss 6.0.1

O happy day- got a keyboard dock. Happiness was short lived; after allowing the dock to charge overnight, I was unable to get either of my tf300's to work with it. The tablets will recognize it as a charging device (you can see the 2 battery icons on the status bar) but that's it- no track pad or keyboard functions. I haven't tried to see if usb is active, though. I've attempted the troubleshooting steps I've seen online, like cold booting a tablet while connected to the dock, all to no avail...
Anyhow, obviously there's no warranty in play here, so I was curious if anyone had any know-how on servicing the dock? I read on Tom's Hardware that the dock needs to be glued somehow after disassembly, so i'd like to consider that "last resort", but if that is what it's going to take, that's okay. Anybody have any suggestions?

monogwai said:
O happy day- got a keyboard dock. Happiness was short lived; after allowing the dock to charge overnight, I was unable to get either of my tf300's to work with it. The tablets will recognize it as a charging device (you can see the 2 battery icons on the status bar) but that's it- no track pad or keyboard functions. I haven't tried to see if usb is active, though. I've attempted the troubleshooting steps I've seen online, like cold booting a tablet while connected to the dock, all to no avail...
Anyhow, obviously there's no warranty in play here, so I was curious if anyone had any know-how on servicing the dock? I read on Tom's Hardware that the dock needs to be glued somehow after disassembly, so i'd like to consider that "last resort", but if that is what it's going to take, that's okay. Anybody have any suggestions?
Click to expand...
Click to collapse
Well, here's a status update... I've gone ahead and opened the dock, and nothing really looked out of place, so I went ahead and reattached the various cables and screwed the sucker back together. I now have the keyboard working. The trackpad, however, still is not working. I took it apart a second time and verified that the cables for the trackpad were plugged all the way in (where the black line on the ribbon cables are flush with the connectors on the boards), and still no go. Anybody have any experience with a non-functional trackpad?

monogwai said:
Well, here's a status update... I've gone ahead and opened the dock, and nothing really looked out of place, so I went ahead and reattached the various cables and screwed the sucker back together. I now have the keyboard working. The trackpad, however, still is not working. I took it apart a second time and verified that the cables for the trackpad were plugged all the way in (where the black line on the ribbon cables are flush with the connectors on the boards), and still no go. Anybody have any experience with a non-functional trackpad?
Click to expand...
Click to collapse
Oh, wow! It didn't even take me an hour to break it again. Went and re-read threads on various forums, and people were having some luck with cold booting while docked. So I did, and yet again the keyboard ceased functioning. Despite having not even moved while reading/rebooting, I opened the dock once more. Of course, nothing appears to have changed, so I don't even know what to do at this point. The vendor has refunded my money, so at least I'm not out anything; it'd be really nice if I could somehow restore function, though.
I can get a replacement keypad/trackpad off eBay, but I'm concerned that my problem may be where the cables attach to the main board. Of course it could also be the ribbon cables themselves. Anyone know somewhere to get new cables at a reasonable price?

I've got the keyboard working again. Seems like once I plug it in to charge, the keyboard stops working and i have to go play with the cables to remedy that. that's only when charging with the tablet attached. haven't tried seeing what happens if i undock, then charge, then redock.
kinda surprised nobody's had any input... <shrugs>. and in regards to something i had said before, it seems i was a bit mistaken: i can order a replacement keypad, but not the trackpad. i'm wondering if i might need a new main board for this instead, though. would like to hear something out of someone who's replaced a board in the dock before i pull the trigger on one. anyone? anyone? Bueller?

new update:
had to set the dock to charge, and naturally, the keyboard didn't work. so i went and took it apart again. this time, though, I plugged the tablet in to the base prior to screwing everything back. I detached the cables from the mainboard, reseated, and checked-- no change. so I detached the mainboard cables again, and proceeded to reseat the cabling where the touchpad is. snapped the tablet back into place; lo and behold, I got a little circle on screen... hey! the trackpad's working!!! Excitedly, I screwed the screws under the trackpad button, and replaced the button, and proceeded to close the tablet so I could flip the dock over and replace the other screws/feet. Opened everything back up and unlocked the tablet and.............. <price is right tuba noise here> no trackpad. total freaking bummer.
I'm guessing now that maybe there's some kind of short somewhere. When I get to my destination this evening (or perhaps tomorrow, to be honest), I will further explore this new development. It's interesting at the very least. I do know the pad isn't totally dead in the water.
it's odd... charging causes the keyboard to stop functioning, and screws apparently cause the pad to stop functioning. very odd.

i've sat down and dismantled the entire thing. i decided to unplug the battery from the system board for a while thinking there might be some kind of situation where that could be helpful. let it sit probably 2 hours while i worked on something else. now i've reassembled, snapped it back together (but no screws yet), and the trackpad is working. has been working for the last hour, give or take. dock is down to 38% charge, so i'm trepidatious (is that even a word? lol) about which step to take next -- seeing what happens when i screw this thing back together, or try and see what happens when i attempt to charge it. i'll have to make some sort of decision, so once that happens, i'll post yet another update. hopefully a solve.

Problems with a dock? unplug that battery for a while!
I've rounded the last corner i think. i've got the charger plugged in to the dock as i sit here and type; trackpad still works too. all that's left is trying to screw it back together, so i'm gonna call this tenatively solved. because if i just can't have screws for some strange reason, i suppose i'm fine with that.

Still working... How does one go about marking something 'solved'? Ask a mod...?