Database Users

[Q] Touchscreen screwy when connected to laptop USB; anyone else?

My Vibrant's touchscreen gets screwy when connected to any of my laptop's USB ports, when the lappy is either on battery or wall power.
By screwy I mean it misreads my presses, as if I pressed elsewhere on the screen. I'm in the 30 day swap period still, but I was lucky enough to get a very bright screened model and am reluctant to swap it unless this power/screen problem is to be worried about.
Have not been able to test on another computer's USB ports yet.
Thanks.
edit: Dell laptop.

Mine works fine OP when connected to both my laptop and my desktop.
Does your laptop happen to be a macbook? Because this phone has problems with apple computers.

No, a Dell. More specifically, this is not when mounting or using ADB. This occurs when merely connected and charging. Seems like it's a spurious signal coming down the USB line from the laptop is my guess.

I've had that unfortunate experience since day one of purchase. I went through three Vibrants.
I swapped the first one because of the touch screen bug with the USB connection. Also, the back button would periodically "stick" and continuously press back until I were to tap it again.
When I got the second one, I realized the issue with the USB remained the same and the "sticky" back button was more frequent than the first one.
The third one that I have now has a more responsive touch screen with the USB connected. It would act up 50% less than the first two. It has moments when it works just fine when I move the cable around and make sure I'm not touching the cable there on after.
My coworker doesn't experience that problem when he tries it on the work computers and my phone doesn't have that problem either. It only acts that way when I plug it into my x64 Sony VAIO, so I'm wondering if it's some sort of related issue.
Don't feel bad. I've been searching online for some sort of remedy since its release and have found nothing.

Are you using the USB cable that came with the phone?

s15274n said:
Are you using the USB cable that came with the phone?
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I've always used the cable it came with. From reading your post, I just tried a USB with a micro USB converter tip, but it still produces the same symptoms.

I had the same problem. went to T-Mobile store (thinking I needed to get a new phone) and after a couple of tests, they gave me a new charger... that solved the issue 100%, so in my case, this was the cable/wall charger, not the phone

^ that's what I was getting at.

Just2Sour said:
I've always used the cable it came with. From reading your post, I just tried a USB with a micro USB converter tip, but it still produces the same symptoms.
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try changing the charger/USB at the store for an original one (not generic micro USB) that took care of me

dq13 said:
try changing the charger/USB at the store for an original one (not generic micro USB) that took care of me
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I swapped al of the contents every time I made the exchange. When it's plugged into an outlet with the charger/USB it comes with, it works just fine. Works fine with any x86 computers at my job. It goes crazy on my x64 desktop and laptop. It's pretty annoying when I'm working on it with Eclipse and I get text messages. It becomes a task just to swype in one word, or disconnect it as an alternative and wait for about five seconds for it to function properly again.

well that sucks. I have x86 at work and 64 bit at home. after swaping the charger/cable, like I said, no more problems anywhere

Wow, I never expected so many responses with the same problems. Thanks guys.
I'm using x64 Win7, so that could be it. Also, am using the stock cable, I have no other micro cables at this time. More in the mail already. I'll check on my bro's 32 bit Win7 laptop and with the aftermarket cables.
Thanks for the responses.

ytj87 said:
Wow, I never expected so many responses with the same problems. Thanks guys.
I'm using x64 Win7, so that could be it. Also, am using the stock cable, I have no other micro cables at this time. More in the mail already. I'll check on my bro's 32 bit Win7 laptop and with the aftermarket cables.
Thanks for the responses.
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Any update?

laptop issues
I have a HP laptop and if my vibrant is connected via stock usb cord my laptop will not boot. It doesn't get past the first HP screen and it shuts off abruptly and tries to reboot. When unplugged everything is fine as long as it is up and running. I can connect my phone and do whatever needs to be done as long as my laptop has booted up. I thought it was kinda weird. I only plug my vibrant in my laptop while tethering to charge. Anyone experience this? btw running win7 64

bwhites1 said:
I have a HP laptop and if my vibrant is connected via stock usb cord my laptop will not boot. It doesn't get past the first HP screenand it shuts off abruptly and tries to reboot. When unplugged everything is fine as long as it is up and running. I can connect my phone and do whatever needs to be done as long as my laptop has booted up. I thought it was kinda weird. I only plug my vibrant in my laptop while tethering to charge. Anyone experience this?
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Happens on my HP aswell but with a Droid incredible connected, must be a HP issue
Sent from my SAMSUNG-SGH-I897 using XDA App

It is because the laptop is trying to boot from one of the removable devices that show up whenever the phone is connected.
Sent from my SGH-T959 using XDA App

Sounds like a CPU preemptive latency problem. The USB port may use big time slices of the CPU during the same time the touchscreen positions are being calculated. This should be fixed with the new update.

ytj87 said:
My Vibrant's touchscreen gets screwy when connected to any of my laptop's USB ports, when the lappy is either on battery or wall power.
By screwy I mean it misreads my presses, as if I pressed elsewhere on the screen. I'm in the 30 day swap period still, but I was lucky enough to get a very bright screened model and am reluctant to swap it unless this power/screen problem is to be worried about.
Have not been able to test on another computer's USB ports yet.
Thanks.
edit: Dell laptop.
Click to expand...
Click to collapse
Mine did the same thing, except it did not matter what power source. When it was plugged into anything, my screen was screwy. Unplug it, and everything worked again. I exchanged mine, and have not had the problem since.

Mine is that way as well, but not with the computer, its that way with one charger that I previously had with my aria. After I unplug, its fine. I read somewhere that the length of the cord might have something to do with it.
Sent from my SAMSUNG-SGH-I897 using XDA App

I used to have this problem with just one miniusb charger for my G1. The problem is there's too much current. You probably have a USB port that puts out more power on AC and it's simply too much for your phone. If it's getting REALLY hot, that's a sure sign.

[Q] No longer prompts for Charge/Mass Storage/Tether?

For some reason my Epic 4G doesn't prompt to mount as USB Mass Storage device or anything for that matter like it used to. Now when I plug it into the usb port on any computer it just starts to charge. USB debugging is disabled. Is there anything I can do to get the prompting option back?

Probably a dumb question here but did you try different usb ports or a different cable?

leatherneck6017 said:
Probably a dumb question here but did you try different usb ports or a different cable?
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Yeah, I've tried different cables, and different computers as well.

Had the same problem, I was using an Micro USB Cable from an LG phone and it wasn't prompting for mount, used the samsung one that came with the phone, came right up.
Not sure if it helps but just try the one that came with the phone.

I've also had this same issue. I think this is what it is.
I too used a cable from an LG Phone and it did this as well. Turns out the cable was a charging only cable, couldn't do data. This could be what you're running into.

schizopunk said:
I've also had this same issue. I think this is what it is.
I too used a cable from an LG Phone and it did this as well. Turns out the cable was a charging only cable, couldn't do data. This could be what you're running into.
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Well, just grabbed the cable that came with the Epic, and it worked! I could have sworn I tried it, but maybe not. I have so many micro usb cables laying around, I guess I better make sure I don't lose this one.

schizopunk said:
I've also had this same issue. I think this is what it is.
I too used a cable from an LG Phone and it did this as well. Turns out the cable was a charging only cable, couldn't do data. This could be what you're running into.
Click to expand...
Click to collapse
That makes alotta sense. I was using my cousing EnV touch cable and it wasn't giving me the option. I'm glad I have a clue now!
Sent from my SPH-D700 using XDA App

I think the biggest advantage of using a cable that doesn't do data is that they normally give more power to your phone since it doesn't have to do the extra work of transferring data.

schizopunk said:
I think the biggest advantage of using a cable that doesn't do data is that they normally give more power to your phone since it doesn't have to do the extra work of transferring data.
Click to expand...
Click to collapse
Yeah, I was reading somewhere about some pins being shorted on charging only cables that allows the phone to draw 600mA from USB just like it does from the wall. The phone can tell the difference and will only prompt when it receives the trickle charge of ~380mA which you get from a non-"shorted" data cable.

[Q] USB 2 Wall Charger adapter disable touchscreen...

Hey guys...
I bought a usb to wall charger adapter, so I could get a fast battery charge and usb connection with just one cable.
But when I connect the adapter to the energy, my phone's touchscreen freezes... I can lock/unlock, and what is happening on the screen (e.g. a movie) continues normal... But I can't interact touching in it. It's like the touchscreen feature is disabled, and becomes just a non-touchscreen display.
Anybody has tried it before? Sucess? Same problem? Wonder why it happens?
Thanks in advance!

It happens the same with me. I bought a cheap one on Ebay.
Sent from my GT-I5800 using XDA App

nathan.lopes said:
Hey guys...
I bought a usb to wall charger adapter, so I could get a fast battery charge and usb connection with just one cable.
But when I connect the adapter to the energy, my phone's touchscreen freezes... I can lock/unlock, and what is happening on the screen (e.g. a movie) continues normal... But I can't interact touching in it. It's like the touchscreen feature is disabled, and becomes just a non-touchscreen display.
Anybody has tried it before? Sucess? Same problem? Wonder why it happens?
Thanks in advance!
Click to expand...
Click to collapse
Cheapa** chargers do not provide right voltage n current. U are just trying to kill ur phone. U will be sorry later.
i5 Rom

arunmcops said:
Cheapa** chargers do not provide right voltage n current. U are just trying to kill ur phone. U will be sorry later.
i5 Rom
Click to expand...
Click to collapse
Thanks arun... I tried to make things easy... but almost killed my device! lol

use orginal charger, same problem here

[Q] Touchscreen goes bananas while plugged in

Hey guys,
I've been googling a bunch but what I found so far hasn't really convinced me.
I have my N7 for a week now and today it suddenly started behaving weirdly: When I plug it in I basically cannot use the touchscreen. Just putting a finger anywhere on the screen makes it go crazy, numerous apps start opening, I can't even unlock the device because the movement isn't being recognized correctly. It seems to work fine when it's not plugged in...
I reset the N7, thinking that this probably is a software problem but it didnt help. Now whats weird is, that I had the same exact problem with my Asus TF300T that I sent back in.
So, am I boned?
I know a lot of people have problems with the touchscreen but nowhere have I seen it described as being that bad when plugged in, it's not usable anymore!
Is there a software solution to this problem? If not I'll sent that sucker in immediately...
Sidenote: That problem only accures when I plug it into the PC. When it's plugged into the wall with the adapter, it works normally

crstn said:
Hey guys,
I've been googling a bunch but what I found so far hasn't really convinced me.
I have my N7 for a week now and today it suddenly started behaving weirdly: When I plug it in I basically cannot use the touchscreen. Just putting a finger anywhere on the screen makes it go crazy, numerous apps start opening, I can't even unlock the device because the movement isn't being recognized correctly. It seems to work fine when it's not plugged in...
I reset the N7, thinking that this probably is a software problem but it didnt help. Now whats weird is, that I had the same exact problem with my Asus TF300T that I sent back in.
So, am I boned?
I know a lot of people have problems with the touchscreen but nowhere have I seen it described as being that bad when plugged in, it's not usable anymore!
Is there a software solution to this problem? If not I'll sent that sucker in immediately...
Sidenote: That problem only accures when I plug it into the PC. When it's plugged into the wall with the adapter, it works normally
Click to expand...
Click to collapse
Hi, i have noticed the same problem. I myself have not found any thread giving solution to this issue. Hope someone knowledgeable can give his insight how to address this issue.
Sent from my Nexus 7 using xda app-developers app

crstn said:
Sidenote: That problem only accures when I plug it into the PC. When it's plugged into the wall with the adapter, it works normally
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Click to collapse
maybe it´s a problem with your usb-port on your pc? did you try another pc?

its your usb, too much voltage going through(or not enough). it happens with some wall chargers too.

simms22 said:
its your usb, too much voltage going through(or not enough). it happens with some wall chargers too.
Click to expand...
Click to collapse
ok so...that would make sense.
but I reset my N7 an hour ago and it worked just fine for an hour until just now...
if it was the usb port, shouldn't this problem occur all the time?

crstn said:
ok so...that would make sense.
but I reset my N7 an hour ago and it worked just fine for an hour until just now...
if it was the usb port, shouldn't this problem occur all the time?
Click to expand...
Click to collapse
same thing happens with a tmobile wall charger i bought, on both my nexus s and galaxy nexus. sometimes its fine for a bit, sometimes its not. i ended up just throwing it away. you can confirm it by try trying another usb port on a different desktop/laptop. try another usb cable just in case too.

I have the exact issue on my Galaxy Nexus. I'd say 90% of chargers and USB cables work but every so often I plug in one that causes that issue. I can only put it down to voltage irregularities.

Must just depend as I was using it yesterday while plugged into my PC.
Sent from my Nexus 7 using Tapatalk 2

S8 feels different when is connected via USB

I've noticed when I connect my S8 via USB to my pc the metall frame on the left and right side feels different. It's feel a little jittery, like a very low vibration and it's blunter.
You can feel how the data move between PC and phone
When I charge the phone it's feel normal.
I think that is not a subjective impression because four other people which I ask to test and feel noticed the same.
Can anyone confirm this with an other phone?

I experienced this with a ZTE phone and some other devices. I think it's because of the voltage that "is on the phone" when it's connected to the charger. But I don't think this is a problem.

that's a bad or absent ground pole in your electrical connection

OK, I guess that you are right x-geo - because when I connect the phone to a laptop which works in battery mode the effect dont occur. When I plug the power supply it's starts to tingle.
But I dont know how this emerge the power supply is connected to a standard German power outlet.
Can this make a problem on a long term?

hannsheinz said:
Can this make a problem on a long term?
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Not much of an electrician, but this could easily turn into a problem.
Electricity variations, when uncontrolled or when they happen when unexpected can damage the hardware.
So pay attention and don't let this issue occur very often.

Happily the effect don't occur when my laptop is on battery mode so I can easy bypass the problem.
Thanks for your support.

hannsheinz said:
Happily the effect don't occur when my laptop is on battery mode so I can easy bypass the problem.
Thanks for your support.
Click to expand...
Click to collapse
Does the problem also happen with the original Samsung wall charger? Did you try a different cable?

It's doenst matter if I use the original samsung usb cable, or any other ubs cable to connect the phone with the laptop