Develop Bugs

screen not sensitive: manufacturing fault or unreal expectations ??

every review i've read online before i bought the unit was boasting about how "finger-friendly" the TP2 was, and that you could lightly swipe your finger across it to navigate the menu and that the touchscreen was very sensitive and whatnot
however after 2 weeks of use i find that to be relatively untrue. i've got to apply a fair amount of pressure on the screen to get it to register my input. of course, i'm posting this because i'm afraid that i might be damaging the screen in the process
i have no basis for comparison actually, my only 2 other touchscreen devices at home are an iphone and a cowon s9, both use capacitive screens. i always knew there was a big difference between capacitive screens and resistive screens, i just didn't know it was THIS huge. i can actually slide my finger lightly over the iphone's surface and its registered properly. the sliding probably feels smoother as its glass, but i can live with the TP2's plastic. what do you guys think ? should i get it checked out at the HTC store ?? its on the other side of town, don't wanna waste a trip as if its not a problem
oh yeah and just to get this out of the way, the screen is a membrane and not a hard surface right ?? everytime i press on the screen using my finger or the stylus, i can feel the screen slightly moving down, can also see the surface getting slightly dented at the point my finger pushes it if looking at it from a certain angle.
ps before somebody asks: i only got to test the keyboard at the telco store, some punk had cracked the screen of the display set, so i didn't know about this screen issue until i actually purchased the set
sorry for the long post, but i'd really appreciate any comments
TIA

Well, I don't have an Iphone so i can't tell you about how it compares with the TP2, however, i found the display to be much better than the one on my old XDA. It will probably never as good as a capacitive device like the touchpad on my laptop, but I found it to work very well. You have to apply a certain amount of pressue to the display, because it reacts on pressure, so I guess there is nothing wrong with that. I also see a small dent when I use the stylus and press the display. I cannot confirm the screen slightly going down when pressing it.
To summarize it, i use the Stylus 90% of the time. It glides much better on the display than my finger does so the overall experience is slightly better when using a stylus. Plus i don't get any greasy fingerprints on my display.
However the 10% I use my fingers to work on it (and 25% of that 10% is spent on polishing I found it to work pretty well, so in general I don't think that the reviews were off when it comes to finger usability.

What you are describing is probably normal. Resistive screens do require pressure. The TP2 tends to require less pressure than others, but nonetheless it does require it. There's no comparison if you compare it to a capacitive screen device because those don't require pressure at all.
The flexing of the screen that you described is something all resistive screens have. Again, if you compare the screen flex of the TP2 to earlier HTC devices, it's greatly improved.
To be on the safe side, go to a store and try out other resistive screen devices and see if you experience the same thing as your own. Then you'll know what is considered "normal".

thanks for the replies, i'll probably head down to my telco's store and see if they've replaced the display set then.
any other comments ??

You know I thought the same, waiting for a cab to increase the sensitivity because at the moment its quite annoying pressing buttons more than once...

From a few years to nowadays i´ve always used QTEK/HTC devices, my latest one is, ofcourse, HTC RHODIUM, the rom it has installed is RUU_Rhodium_HTC_PTG_1.19.410.0_Radio_Rhodium_3.44.25.27_Signed_Ship, and the screen is very sensitive and responsive, i´m just very pleased with it overall, it´s the best.
Cheers.

eXceed said:
You know I thought the same, waiting for a cab to increase the sensitivity because at the moment its quite annoying pressing buttons more than once...
Click to expand...
Click to collapse
you don't need .cab
just change in registry...
HKLM/drivers/Touch Driver/pressurethreshold, (default=10000)
(I might not remember perfectly, but it's something like that)

try this?
http://forum.xda-developers.com/showthread.php?t=469865

this might help just re align your screen again using little pressure then your screen will not need some much pressure to work.
I have found the this not only aligns the screen but the pressure as well.
mine I just have to lightly touch it and dont have to press very much at all.
Cheers

Improperly grounded touchscreen?

My capacitive touchscreen has been having a pretty odd issue. If I lay the phone on a bed or desk and try to use the touchscreen with only one finger, I get all sorts of weird input on the screen. Then, if I touch the phone casing while repeating the same motion with the same finger (anywhere on the side of the casing or rear panel) the touchscreen works flawlessly.
Right now, my device is sitting on my bed, if I unlock it and try to pull down the notification window shade with just one finger, it's impossible. If I touch the casing with another finger and then try to pull down the shade, it's flawless.
From my understanding, in a capacitive touchscreen, a layer of electrons (ions?) is passed over the screen and a sensor detects where the flow of electrons is interrupted by the electrical conductivity of the human body. It seems that my phone is having issues with the electrons not just flowing over the screen, but around the casing as well, causing issues.
Anyone else experiencing this?

DaytonaZ33 said:
My capacitive touchscreen has been having a pretty odd issue. If I lay the phone on a bed or desk and try to use the touchscreen with only one finger, I get all sorts of weird input on the screen. Then, if I touch the phone casing while repeating the same motion with the same finger (anywhere on the side of the casing or rear panel) the touchscreen works flawlessly.
Right now, my device is sitting on my bed, if I unlock it and try to pull down the notification window shade with just one finger, it's impossible. If I touch the casing with another finger and then try to pull down the shade, it's flawless.
From my understanding, in a capacitive touchscreen, a layer of electrons (ions?) is passed over the screen and a sensor detects where the flow of electrons is interrupted by the electrical conductivity of the human body. It seems that my phone is having issues with the electrons not just flowing over the screen, but around the casing as well, causing issues.
Anyone else experiencing this?
Click to expand...
Click to collapse
This appears to be a significant issues of owners of the HTC Incredible. You might get more useful information in that board, seeing as how they've been experiencing it for much longer than we have.

Wow, the video that they have on the Incredible forums of the phone on the Styrofoam is exactly the same issue I am seeing on my device.
I would link it, but apparently new users aren't allowed links. Ugh, this is a real bummer. Especially since that guy had 2 replacements sent to him, both with the same issues.

I too am experiencing this. I want you to try something a little different. Pull the kickstand out and stand it up on the bed. Then put your finger on the kickstand and you should be able to pull the notification bar down all the way to the bottom and let it lock with your other hand while still keeping the finger on the kickstand. Then take that finger off of the kickstand then slowly bring the notification menu bar back towards the top with your finger. Tell me your results. And i'll let you know if we had the same.

It appears that HTC has got some serious quality control to enforce on their recent devices. At this point, releasing a flagship phone with these issues is nothing short of unacceptable. I'm as big of an HTC fanboy as they come, but I'm really considering switching loyalties to Motorola is this crap continues. It's bad enough being capped at 30fps on the Evo.

If I put my finger on the kickstand I can pull down the notification bar completely, without issue. When I let go and pull the bar up, it works, but looks like it is trailing behind where my finger is by about a half inch, until I get roughly 3/4 of the way up to the top then it passes my finger like i'm not touching the screen anymore.

DaytonaZ33 said:
When I let go and pull the bar up, it works, but looks like it is trailing behind where my finger is by about a half inch, until I get roughly 3/4 of the way up to the top then it passes my finger like i'm not touching the screen anymore.
Click to expand...
Click to collapse
That might be the touch input lag we're experiencing as well. This may be tied to the 30fps graphic limit on the Evo.

The 30 fps limit is disconcerting, but that seems like it is something that could be fixed through firmware, however I doubt this issue is fixable.

Yeah, that's the exact same response I received from it; except when going back up, i reached the 1/2 way point on the screen and the notification bar shot up.

Android Believer said:
Yeah, that's the exact same response I received from it; except when going back up, i reached the 1/2 way point on the screen and the notification bar shot up.
Click to expand...
Click to collapse
Well this is slightly depressing.

Ugh, my curiosity got the best of me, and the results aren't pretty.
When I lie my Evo down on a flat surface, the notification bar becomes absolutely impossible to pull down unless another finger touches any part of the phone. A test on the multitouch visualizer app shows that the screen completely stops recognizing my finger when y1 is equal to 40. This is essentially the entire height of the notification bar.
This isn't a deal breaker in any way, but what the ****, HTC? Is this how you treat your customers?

On mine, my screen becomes effected as early as y=500, then gets really bad around y=250, then is completely unresponsive after y=100.

Mecha2142 said:
Ugh, my curiosity got the best of me, and the results aren't pretty.
When I lie my Evo down on a flat surface, the notification bar becomes absolutely impossible to pull down unless another finger touches any part of the phone. A test on the multitouch visualizer app shows that the screen completely stops recognizing my finger when y1 is equal to 40. This is essentially the entire height of the notification bar.
This isn't a deal breaker in any way, but what the ****, HTC? Is this how you treat your customers?
Click to expand...
Click to collapse
wow, that blows, mine does the bad response -40 thing. holy ****, it's really just one thing after another with these phones...

I guess there is no such thing as a perfect phone no matter how much money, research, and time is invested into it.
I too have this issue, I have noticed occasionally its hard to pull out the notification bar, but when I pick up the phone and pull bar with other hand it works perfect.

For the heck of it I tested my Evo on every surface i could my hands on from glass, to thick carpet, bed sheets, etc, etc. Mine doesn't seem to have this issue, so it's definitely not every phone. If it's a big issue for you, you may want to see about getting it replaced.

Darth Duane said:
For the heck of it I tested my Evo on every surface i could my hands on from glass, to thick carpet, bed sheets, etc, etc. Mine doesn't seem to have this issue, so it's definitely not every phone. If it's a big issue for you, you may want to see about getting it replaced.
Click to expand...
Click to collapse
Thanks for the thoroughness of your test!

http://www.youtube.com/watch?v=_kJ_fR02suQ i recorded it so people can see what's going on.

Have any of you contacted Sprint about this? I'd definitely try to get it replaced ASAP if I were you, hopefully the next one won't have this problem.

I spoke with a lady from HTC today and she said that they were aware of the grounding issue before it was released (during training). She didn't say whether it could be fixed or not though.

mine works perfectly fine i just tested it right now
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Sent via the XDA Tapatalk App

Touch screen shaking when finger hold

Usually when I am browsing through a long list or web page, I hold my finger on the screen. Screen will shake rapidly at this time. I have tried 3 of them and all having the same problem. Any solution to fix it?
youtu.be/A4jgpZSwwyQ
Sent from my LT15i using XDA App

If you mean something like a small change on screen brightness ,you can try to set brightness to full.That seems to worked for me.

netgouki said:
Usually when I am browsing through a long list or web page, I hold my finger on the screen. Screen will shake rapidly at this time. I have tried 3 of them and all having the same problem. Any solution to fix it?
youtu.be/A4jgpZSwwyQ
Sent from my LT15i using XDA App
Click to expand...
Click to collapse
I got this problem too
Sent from my Xperia Arc (Rooted)

It might be a stupid suggestion, but when you hold your finger on the screen for more than 2-3 seconds, don't you start to mark the text? hence the screen picks up the minute shaking of your finger? If you move your finger without releasing the screen when it shakes I believe you start to mark text for copy/paste??
I might have misunderstood the problem entirely, so please be gentle

+1.
Got the same problem and looking for a solution.

The touch screen is really really bad i have a lot of problems with the touch screen. I don't know if it's software or hardware problem. SE doesn't say anything about this.
It's really annoying when playing games or typing really fast. it doesn't track your finger properly.
This has to take media attention so SE will be forced talk about it. i love that they are trying to be dev friendly at all. but this issue isn't making me happy.

I always do this when I browsing a long text and wanted to scroll slowly. The shaking problem always make me dizzy.
I also encounter problem with typing too.

probably a touch screen driver issue... it thinks your moving your finger up and down slightly when really it's stationary. just take your finger off of the screen when you want to read something. there's no need to have to keep your finger there anyways

akusokuzan said:
probably a touch screen driver issue... it thinks your moving your finger up and down slightly when really it's stationary. just take your finger off of the screen when you want to read something. there's no need to have to keep your finger there anyways
Click to expand...
Click to collapse
It's not about putting your finger on the screen. there are serious problems with the touch screen. i made a youtube vids to show the problem
http://www.youtube.com/watch?v=cwr0rFzCU4k
SE has to give answers about the problems i'm getting tired of the screen issues.

Try superpaint lite, it seems to be program's fault not the screen

I replied @ youtube and also putting it here. I tried it but it doesn't recognize if finger points switch to fast.
This also happens with all other apps and games like SE Launcher, Angry birds, taptap revolutions, GB keyboard ....
http://forum.xda-developers.com/showthread.php?t=1034319 here is also a thread

Just upgraded the firmware from SE and claimed to fix some bugs and improve stability. Nothing change for the touch screen issue. Don't know whether Sony didn't notice the problem or it's just an unfixable hardware defect.
Sent from my LT15i using XDA App

The problem with touch screen depends on how you touch as well...
If you touch by your thumb with full finger touch, the sharking will occur, the more area that your finger attach to the screen mean more sharking
now change your habit, touch the screen with only by the edge of your finger or with your smaller finger the screen will hold stable.
Their a limit area of your finger attach to the screen so that the screen will keep stable, over that limit area the screen will sharking.

netgouki said:
Usually when I am browsing through a long list or web page, I hold my finger on the screen. Screen will shake rapidly at this time. I have tried 3 of them and all having the same problem. Any solution to fix it?
youtu.be/A4jgpZSwwyQ
Sent from my LT15i using XDA App
Click to expand...
Click to collapse
Zoom in?
I got a lot of this when browsing too. Esp. with opera, if I need to open it in new tab, I need a long press on link. And often if the icon/text isn't bigger than my finger touch size, the screen will shake.
Unfortunately, the best way I found is to zoom in.

hmmmm...
It's so sad that we need to change our behavior to coop with a device that supposed to make our life easier.
I find that all the embeded apps provided by SE do not have the shaking problem. I guess SE do know about the issue so they made some tweat on them.
My finger tips are quite larger (as I play bowling).
Sent from my LT15i using XDA App

Its the stupid, thick, shatter proof film thats making touch functions go crazy. Peel that crap off your screen and the device will work as intended.
I had the same issue with my x10, because the film does not allow for a good connection between your finger and the screen, the screen detects multiple touches.
I removed the film (Thats does not protect against scratches and is actually more prone to them) and the screen was absolutely PERFECT.
Does HTC need a shatter proof film on their Mineral Glass? NO so neither does the Arc, just remove that junk and put a good screen protector on it.

gunstar3035 said:
Its the stupid, thick, shatter proof film thats making touch functions go crazy. Peel that crap off your screen and the device will work as intended.
I had the same issue with my x10, because the film does not allow for a good connection between your finger and the screen, the screen detects multiple touches.
I removed the film (Thats does not protect against scratches and is actually more prone to them) and the screen was absolutely PERFECT.
Does HTC need a shatter proof film on their Mineral Glass? NO so neither does the Arc, just remove that junk and put a good screen protector on it.
Click to expand...
Click to collapse
NOO you are wrong. Ive done it already and it doesnt make this problem go away what so ever.

zeban said:
NOO you are wrong. Ive done it already and it doesnt make this problem go away what so ever.
Click to expand...
Click to collapse
Did for me, I am assuming you have a defective unit.

Do you mean there is a film that come with the phone? or film that added by myself?
Sent from my LT15i using XDA App

gunstar3035 said:
Did for me, I am assuming you have a defective unit.
Click to expand...
Click to collapse
I think you have misunderstood the problem of this thread.
Because you say that your old x10 had this problem as well?

[Q] Screen sensitivity Issues??!!

I noticed an issue with the screen of the galaxy nexus.
-It seems that it does not regester the touch of my finger as good as my nexus s. " once you touch the nexus s screen very lightly you see a direct response. In the GN the light touches does not regester. Is that normal??
-Another way to test for it is using a stylus... the nexus s works perfectly with the stylus touch. In the GN you have to push slightly for the touch to register.
Finally.. when touching the keyboard very slowly... the button does not register no matter how hard you press. weird!
Have any one noticed this issue?

cvbcbcmv said:
This simply scientifically doesn't make sense. If the nexus was a resistive touchscreen you would have to push hard, but, it's not. On a capacitive touchscreen it picks up the electrons in your finger, so, the lightest touch registers. It is impossible that pushing harder works better, that's not how the screen works. This is the case on the GPS in your car, not on your phone. It's probably your messed up brain ha ha jk
Click to expand...
Click to collapse
I know what I'm talking about!!. what I meant is: you need a larger surface area of your finger to touch the screen for it to register the touch.
there is a significant sensitivity difference between the GN & the nexus s

Here is a quick video demonstrating that slow touches does not register:
http://youtu.be/3a8rMJvI7zs

Personally, my nexus allows me to barely touch the screen to register. BUT, in past experience with capacitive screens, when my fingers were particularly dry the screen wouldn't register unless I put more finger surface down. I do a lot of wood working and all the saw dust really sucks the moisture out. Now, whether its the lack of moisture, or the capacitance between my dry static-y finger and the screen surface making mini lightening bolts, I don't know, but there was a big difference
Sent from my Galaxy Nexus Bugless Beast 4.0.3 lte +franco#5

This could be due to the fact your not holding the phone in your hand while interacting with the touchscreen, on nexus ones the touch screen/capactive buttons didn't work too well when the phone was placed on a desk and interacted with.
Sent from my MZ604 using xda premium

I have seen the same issue as the op, it is especially noticeable on the system soft keys where they require more finger surface area before they register the touch. The worst offender is the three dot menu key in the soft key area.
Hope they tweak the screen sensitivity a bit.
Sent from my Galaxy Nexus using Tapatalk

It also happens when I'm holding the device in my hand. I noticed that the lower screen is less sensitive than the upper part.

me too can confirm this issue.... it's like in the posted video:
trying to touch the screen on the Gnex sooooo slowly/lightly some times the screen don't take the input
you can verify in dev setting on the option that show you touch screen coordinate when you touch.... on the bottom of the screen you can see 'PRS' value (pression): try to touch so light you can the screen, you will never see number lower than 0,26/0,27 values.... now, if you can, try out on nexus s on other phone you have... you will see a very lower number. Lower is the number, better is the touchscreen sensibility.
and..... i know the difference beetwin capacitive and resistive touch..... soo, why can appen this issue to a capacitive one!?!?
p.s. i think this could be a software/driver isseu..... then could bee adjusted by a dev
there is app usefull for this problem, but only for Gnote/Gtab and transformer:
https://play.google.com/store/apps/...251bGwsMSwxLDEsImNvbS52aXRhbC50c3QubjcwMDAiXQ..
i think some dev can look into this and make one app for galaxy nexus too

can i make....?
Up! XD

To add to this. Overall theGnex touch screen is excellent. The driver seems to be configured to reject touches that are under a certain level of "distinction". If you slowly touch the screen and slowly spread the area of your finger skin over the screen, the touch is rejected. Generally it has stopped some inadvertant brushes, however if using the phone in bed holding it with one hand, it can be hard to use the touch since it can be hard in certain positions to be a bit "snappy" with your touch. It definitely seems intended.

yes.... thanks for the reply
i hope some dev can look into the driver and increase a little bit the screen sensibility.... as you had spoke, on the bed it's harder use the softkey.... and when i put my gnex in cardock it's the same....

you can try this app too it can change the sensitivity, minimum motion and duration to register touch. i have it installed and it does make the touchscreen quicker and more accurate for me. Need root for this one.
https://play.google.com/store/apps/...Nob3A0YXBwcy50b3VjaHNjcmVlbmJvb3N0ZXIuY29tIl0.

neotekz said:
you can try this app too it can change the sensitivity, minimum motion and duration to register touch. i have it installed and it does make the touchscreen quicker and more accurate for me. Need root for this one.
https://play.google.com/store/apps/...Nob3A0YXBwcy50b3VjaHNjcmVlbmJvb3N0ZXIuY29tIl0.
Click to expand...
Click to collapse
it seems only for samsung galaxy S....

yes but it's reported to work for the galaxy nexus as well. im using it with my nexus.

I posted this in franco's thread but it didn't receive a response.
http://forum.xda-developers.com/show....php?t=1559015
It seems you can edit the touch screen driver in the kernel for the Galaxy S2 and improve the sensitivity.
It has to be some sort of setting to ignore slow touches.

We have to find the equivalent driver code for the nexus. But definitely interested in this, looks like the solution we need.

Noticed this on my Galaxy Nexus as well. Thanks for the confirmation

did anyone find a solution to this problem? I tried the SGS Screen Booster app and i still can't get some touches to register. (i.e., the App doesn't seem to make a difference)

R: [Q] Screen sensitivity Issues??!!
Yeah i can confirm this!
My Nexus is D1 production (jan 2013) and i noted that in general bottom part is less sensitive than upper part!! Quite obvious in the corners and the nav bar. It is not linked to accidentally hit buttons, because you can try to rotate and that part will always be less sensitive.
Even in the upper part, my s2 is far more sensitive than this!
I hope it can be tweaked via software, but I smell crappy hardware here (Samsung Samsung....) because I already returned two devices.
Now that i know someone else noted it, I feel less crazy
Sent from my Galaxy Nexus using xda app-developers app

[Request?] Possible Nav Bar alternative

So before my GNEX i used to own a Motorola Atrix 4G, so one time when i was flashing some img files through fastboot, by mistake i overwrote one of the img files that store the phone's stock touch calibration, so as soon as i turned on the phone i noticed that wherever i touched the screen, the reaction was as if i was touching the screen 2cm above, and to my surprise, even below the screen on the black frame there was also touch response for 2cm above.
So I concluded that the entire glass sheet over the display is capable of detecting touch input, but it is calibrated to take input only within the display itself.
This got me thinking, what if the GNEX's touch surface had the same property, what if we could recalibrate the area of the bottom frame and possibly map (back, home, and recents) buttons into them and get rid of the space consuming,burn-in inducing nav-bar.
Discuss

considering the led is housed there I really doubt it's possible

But maybe to the left and right of the LED... I like the idea, man, like the Palm Phones, we could just remember that left of LED is home and right of LED is back or long press Menu on left side for home, I dunno, but I like the idea!
Messing with my old thunderbolt, I can start flicking down the navbar before my finger makes it to the actual screen, it works just above it.
Sent from my ADR6400L using xda app-developers app

Touch should work over the LED area because technically it is uniform over the entire touch surface.
I understand the logic of your conclusion, but think of it this way, the display is technically the same thing, its a display with the touch surface a few millimeters above it. The reason there's no touch response on the frame around the display is because the touch response is calibrated to respond within those perimeters.

Cool idea. Any idea how to go about it?

I derived this theory from what happened with me on my Atrix
I was hoping someone with knowledge around this field would atvleast shed a light on whether this is possible or not. I, with my very limited knowledge around this field compared to most of the developers on this forum, believe that this might be possible if the GNEX had a similar approach to the screen touch calibration as the atrix and if we can have access to these drivers.
I disparately wish I could start resolving deleimas like these myself with practice and time, but in the meantime, who thinks this is a plausible idea?