NOTIFICATION BAR scrolling down without touching it: Static Electr & Capacitive Scrns
I would like to know if anyone else has experienced this at least once. I didn't post here as a thread til I got confirmation from one other DESIRE user that this has happened to him as well.
I don't know the exact triggers or even the exact scenarios, but this has happened several times to me already:
I am using the phone in horizontal mode and tapping menu items or inputting text, and my finger is nowhere even close to the Notification Bar at top of screen -- and yet suddenly the Notification Bar will auto-scroll down, interrupting what I was doing. Repeated times. It would happen again, with no accidental slippage of my finger or anything. My finger would be nowhere near the bar.
I am wondering if there is any kind of static electricity effect with capacitive screens that can set off a menu action.
So I am asking the experts here. Is that possible? Is it anything that was reported with the Nexus One?
RELATED (1): After this happened a few time in ONE SESSION using the phone -- it happened to be while uploading videos to YouTube, I wanted to test to see if I moved my finger close to the Notification Bar would this perhaps trigger this auto-scroll-down. So I moved my finger just slightly above the surface of the glass at the Notification Bar, and it didn't make it scroll down, but on this occasion, it set off a kind of jumpiness whereby the notification bar was rapidly shifting up and down a few pixels, as though it was receiving input. Has anyone seen this happen? I have not yet been able to get this to repeat from that session of using the phone a few days ago. I was lying down on my bed, and I'm pretty sure sheets produce a lot of static electricity, so this is my layman's question. Is there some causal effect here?
RELATED (2): A variation on this problem would be where I am actually trying to select a menu choice, and instead of my finger-press activating the menu item, instead the menu item jumps up slightly, and does not get selected.
This, again, happened when I was in ALBUM MODE, watched a video in horizontal display, then tapped-and-held the video to bring up the context menu that includes various SHARE options. One of those options is YouTube (the last item of the menu). I would try to select "YouTube" but the menu jumped upwards slightly, and wouldn't get selected.
I have been able to reproduce this one (Related 2) today, days later, in totally different environment .
So, a bunch of questions:
1. Is there such a thing as a static electricity effect that confuses the screen?
2. Are there other kinds of known screen-response problems that could be at play here?
3. Is this something that sounds like "it's defective so return it", or is this a somewhat common experience, sporadically?
the only time I've had that happen to me is when I use a cheap charger I've got and yeah the screen just skitses out. I am using a hero tho but this is the first time I've seen anyone else encounter this so I thought il'd churp in.
I had something similar only once.
The notification bar went mad. It was flicking up and down constantly without me touching the phone at all.
I had to pull the battery to fix the problem.
Hasn't happened since.
Fon22
Happened to me also when loading a ROM in Nesoid.
So I'm not sensing any concerns re; any defect... but still wondering, since I don't know the physics of capacitive screens... Is static electricity the culprit? Never happened once on my GSM HERO... so something is at play here.. or is it an intermittent defect that rarely shows up?
quicksite said:
So I'm not sensing any concerns re; any defect... but still wondering, since I don't know the physics of capacitive screens... Is static electricity the culprit? Never happened once on my GSM HERO... so something is at play here.. or is it an intermittent defect that rarely shows up?
Click to expand...
Click to collapse
The capacitive touch screens work by detecting a disturbance in the EM field on the glass surface. There's a few ways to do it, I think the way mobile phones are doing this is to put a field of their own over the glass and detect fingers on the surface based on what levels of the field they'd expect to see at different points around the screen, and doing some comparisons on what levels are actually detected.
Please someone correct me if I'm wrong BTW.
I've noticed this notification bar problem today and yesterday. Lucky I at least saw how I caused it. My finger was to close to the top right of the screen because of the way I was holding the handset. That combined with the lacklustre multi-touch support on this handset made the phone detect it as a finger swipe that rapidly moved downwards.
I've always had similar problems with capacitative and inductive touch technologies. I don't actually need to touch the desires screen to activate a touch. The worsted was the Zen Micro with the touch controls. I could activate that thing from about 10-15mm away. The touch on-off-dimming lamps too. I usually cycle those through all their light levels with a single touch. Where as my brother actually struggles to activate those, really has to press his hand down hard on them.
Brilliant, Alex... You got right inside my head and answered exactly what i was trying to ask.... the physics of the system.
I'm okay with little glitches here and there, and I am sure I will learn to avoid proximity issues that tend to trigger these mis-fires... just as I learned to adjust my tap-key behavior in typing on the on-screen keyboard on capacitive screen vs all the resistive screens I had used before on Windows Mobile, where fingernails could & would engage the resistive screen -- vs learning that the bottom surface of the finger has to make contact on the keys on capacitive screen... (sorry i am USA and we still resist the world's metric standard, so i don't know the equivalent distance in cm,)... but it's over a 1/4-inch of an upward shift in the position of one's fingers above the capacitive screen from the tip of the fingernail.
But once you train your senses to activate the keys sensors properly, the finger impact behaviors of resistive screens goes away after a while (at least for me)
(oh, btw, I ordered the new HTC capacitive stylus which is a couple of months old now, but is an official DESIRE accessory, so that will be an interesting experience... the thing i miss most about the resistive screen and stylus was being able to scribble notes really fast, way faster than i could ever type -- and draw pretty detailed images or maps and directuions for people. so it will be interesting to see the granularity of control the capacitive stylus will give)
So thanks very much for giving me the exact level of detail I can process as a lay person.. and for assuring me, as the rest of you have as well, that this apparently comes with the territory of this phone -- and therefore should not be seen as a defect. Because i sure as hell didn't want to go shipping this phone back. I can live with an occasional spazzoid misread of intended impact spot on screen...
And, fnally, this was funny -- re the different degree of touch we all consider "normal" --
The touch on-off-dimming lamps too. I usually cycle those through all their light levels with a single touch. Where as my brother actually struggles to activate those, really has to press his hand down hard on them.
Click to expand...
Click to collapse
thanks!
Alex_w said:
The capacitive touch screens work by detecting a disturbance in the EM field on the glass surface. There's a few ways to do it, I think the way mobile phones are doing this is to put a field of their own over the glass and detect fingers on the surface based on what levels of the field they'd expect to see at different points around the screen, and doing some comparisons on what levels are actually detected.
Please someone correct me if I'm wrong BTW.
I've noticed this notification bar problem today and yesterday. Lucky I at least saw how I caused it. My finger was to close to the top right of the screen because of the way I was holding the handset. That combined with the lacklustre multi-touch support on this handset made the phone detect it as a finger swipe that rapidly moved downwards.
I've always had similar problems with capacitative and inductive touch technologies. I don't actually need to touch the desires screen to activate a touch. The worsted was the Zen Micro with the touch controls. I could activate that thing from about 10-15mm away. The touch on-off-dimming lamps too. I usually cycle those through all their light levels with a single touch. Where as my brother actually struggles to activate those, really has to press his hand down hard on them.
Click to expand...
Click to collapse
I was thinking it is softwarerelated. The bar remains halfway the screen, is in the layer below the active app, and jumps to front upon touching the screen.
I have the Problem, too. And that since Monday. I went mad since yesterday evening so i tried to go back to stock, unroot and all.
But the problem is still there.
How can i fix it? Or is my Phone damaged?!
The Notification Bar scrolls down without touching the display and then freezes the phone. so i must lock the phone and relock it and then i can use the phone but after a short time the same problem came back!!
So I reckon you're an undertaker for a living?
Sent from my HTC Desire using Tapatalk 2
erklat said:
So I reckon you're an undertaker for a living?
Click to expand...
Click to collapse
Sorry but i don't understand what you mean
The problem makes me crazy because i have now the stock rom because i thougt it was an issue due a custom rom or a kernel or something.
If you can help me please do that, this problem robs me to sleep
But i havent the Desire. I Have the HTC EVO 3D GSM
19Marc89 said:
Sorry but i don't understand what you mean
Click to expand...
Click to collapse
lol digging up the dead
Sent from my HTC Desire
Sorry but I do not understand the background of your information which is in context with my problem of the notification bar.
@19Marc89 He meant that you responded to a an old (dead) post. Listen, I'm trying to recondition an old Motorola Milestone (Droid) with a crazy touchscreen problem, whose cause I believe I've narrowed down to static electricity - can you do me a favor and try stroking the glass side of the phone lengthwise in one direction down your sleeve, preferably if you have a wool sweater on? Call me crazy, but this works for me, at least temporarily. I posted more here:
http://forum.xda-developers.com/showthread.php?t=1041943&page=5
install gravitybox. go to >statusbar tweaks>disable peek. click it. problem solved!
quicksite said:
I would like to know if anyone else has experienced this at least once. I didn't post here as a thread til I got confirmation from one other DESIRE user that this has happened to him as well.
I don't know the exact triggers or even the exact scenarios, but this has happened several times to me already:
I am using the phone in horizontal mode and tapping menu items or inputting text, and my finger is nowhere even close to the Notification Bar at top of screen -- and yet suddenly the Notification Bar will auto-scroll down, interrupting what I was doing. Repeated times. It would happen again, with no accidental slippage of my finger or anything. My finger would be nowhere near the bar.
I am wondering if there is any kind of static electricity effect with capacitive screens that can set off a menu action.
So I am asking the experts here. Is that possible? Is it anything that was reported with the Nexus One?
RELATED (1): After this happened a few time in ONE SESSION using the phone -- it happened to be while uploading videos to YouTube, I wanted to test to see if I moved my finger close to the Notification Bar would this perhaps trigger this auto-scroll-down. So I moved my finger just slightly above the surface of the glass at the Notification Bar, and it didn't make it scroll down, but on this occasion, it set off a kind of jumpiness whereby the notification bar was rapidly shifting up and down a few pixels, as though it was receiving input. Has anyone seen this happen? I have not yet been able to get this to repeat from that session of using the phone a few days ago. I was lying down on my bed, and I'm pretty sure sheets produce a lot of static electricity, so this is my layman's question. Is there some causal effect here?
RELATED (2): A variation on this problem would be where I am actually trying to select a menu choice, and instead of my finger-press activating the menu item, instead the menu item jumps up slightly, and does not get selected.
This, again, happened when I was in ALBUM MODE, watched a video in horizontal display, then tapped-and-held the video to bring up the context menu that includes various SHARE options. One of those options is YouTube (the last item of the menu). I would try to select "YouTube" but the menu jumped upwards slightly, and wouldn't get selected.
I have been able to reproduce this one (Related 2) today, days later, in totally different environment .
So, a bunch of questions:
1. Is there such a thing as a static electricity effect that confuses the screen?
2. Are there other kinds of known screen-response problems that could be at play here?
3. Is this something that sounds like "it's defective so return it", or is this a somewhat common experience, sporadically?
Click to expand...
Click to collapse
REPLY :
install gravitybox. go to >statusbar tweaks>disable peek. click it. problem solved!
I know I am many years late but did you somehow manage to solve this problem?
Hello,
I have a 3 month old LG G3. All been working great until just this week where on a section towards the right hand side of the screen, touches don't seem to recognised! Very strange.
Using the hidden menu of the LG G3 I've done some touch tests and you can see that when my finger gets passed a certain x co-ordinate, the screen no longer recognises where I'm touching until I go far enough passed it, to the right to another certain x co-ordinate. This has the effect of a column of the screen being out of action. I would say this column has a width of about one app icon.
This would seem to possibly be a hardware fault. But I have been experimenting with other app launchers this week. And I wondered if they could somehow have affected my touchscreen calibration or similar? Or is it just a coincidence? Only the other launchers showed some strange functionality when used with the G3. And they show less icon columns etc, so does this imply they operate a lower resolution, or dpi? And if so, could it have confused my screen somehow?!
Clutching at straws with that. But if anyone can suggest a way this could be fixed without a hardware repair, that would be massively appreciated.
Many thanks.
solutions?
Have you found an answer to this problems? I am having the same issue!
I noticed after upgrading to Lollipop that it was difficult to navigate menus near the top of the screen in some apps. I turned on the "pointer location" option and sure enough I found very strange results.
i.imgur com/tPdVowo.png (you'll have to add a period after the domain name, new user status prevents me from posting links)
This first screenshot is me running two fingers all the way to the top of the screen, and once i reached the top i ran them towards the edge of the screen. As you can see there is an area where the pointer location bugs out.
i.imgur com/bh5hWeV.png
This image is just a single finger running horizontally across the top of the screen. The top line is where my finger actually was, but the phone also registered extra touches as you can see from the line below. There's even a section where the top line didn't register at all.
This is a Verizon phone, never been rooted, and hasn't been dropped or wet. I noticed while making this post that the area i am having issues with aligns almost perfectly with the top part of Sense's notification menu.
Is this normal or do I need to exchange my phone?
I am having the same issue with my phone. When I turn on show touches in developer options or install a multitouch test app, it'll show an extra touch just below where I'm touching but only when I'm touching at the top of the screen. Stock lollipop, never rooted, no water damage.
Bump
same problem. do you have s-off? downgrade firmware and rom - maybe this fix problem?
bumbarush said:
same problem. do you have s-off? downgrade firmware and rom - maybe this fix problem?
Click to expand...
Click to collapse
I don't. I didn't want to do that yet. Was hoping to see if anyone else had the issue and if they were able to resolve it.
Just want to see if anyone was able to resolve this issue.
fixed!
we need the old piezo lighter's element. The phone must be turned off. A few strokes on the screen near the problem area, and voila, the screen works again. Do not be afraid, the phone will not be damaged
i
on russian:
http://4pda.ru/forum/index.php?showtopic=496511
First things first: This is a crosspost from https://forums.lenovo.com/t5/Moto-Z-Play/Bottom-part-of-screen-non-responsive/td-p/3630276. Hope this is ok.
Hello,
I have a problem with the touch screen. I noticed that pressing the home button isn't recognized every time. Sometimes nothing happens (no vibration, nothing).
So I investigated a little: I turned on the developer settings, enabled the "Pointer location" option so that the OS shows the path where I drag my finger.
I then dragged my finger from the bottom left/right of the screen into the bottom center in different arches. You can see the result in the attached file on the left side. (I combined all screenshots into one image)
What I came to find is that apparently there's a dead zone in the middle of the bottom of the screen!!! I have marked this area approximately with a red ellipse on the right side of the attached screenshot.
What can I do to remedy this issue? Do I have to RMA my phone? Can I solve this with a screen recalibration myself?
Please advise,
Best regards,
Chris
Attachment: http://i.imgur.com/v4QfDyB.png
EDIT:
Found the culprit! "Fingerprint Quick Action" (com.ztc1997.fingerprint2sleep) was responsible for this behaviour! That's sad, because I liked the additional home button via fingerprint reader...
I also use the app and experience the symptom. Thanks for the info, good to know at least what is causing the problem...
So i bought a oneplus 5t with a slightly cracked (only one crack on the top of the screen, and it's not catastrophic) but (almost) fully functional screen.
It detects every touch accurately, 3 fingers same time, etc.
The only problem is, when i want to swipe (even on the home page, when u wanna scroll down the status bar f.e.), it stops scrolling the exact moment i take off my finger, or scrolls just a little bit.
I'm aware, that the crack on the screen might be causing it.
I did the factory mode calibration. I did reset the whole phone, hoping the problem somehow gets solved, but it didnt change anything.
The problem is very consistent, therefore it's useable, if you accept the fact, that the screen responds only when your finger is touching it and no longer.
I feel like if i could change the sensitivity of the touchscreen, or the responsiveness on the gestures it receives, i were able to make it just as new.
Oneplus 5t (OOS 10.0.1, TWRP and Magisk installed, in case you have some app or sth that requires root)
(I couldnt find the parameters that has relation to touch sensitivity in the build.prop file, i'd be glad if someone linked me a guide)