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?
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse
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.

slow / laggy when charging S2

have anyone got issues with S2 when plugged into power?
ie when I start recharging direct from 240V adapter, my S2 started getting VERY laggy and slow.
It immediately goes back to normal response when I unplug power.

I have never problem like you

mtrax said:
have anyone got issues with S2 when plugged into power?
ie when I start recharging direct from 240V adapter, my S2 started getting VERY laggy and slow.
It immediately goes back to normal response when I unplug power.
Click to expand...
Click to collapse
Try using an alternative charger...probably your mains charger or the usb connector on the charger is damaged.

I'm pretty sure its a issue with the s/w as I have used the charger on another phone without any issue.
unless its one of the apps I'm using, not sure how to narrow it down.

mtrax...
I have the same issue.
You´re not alone...LOL

FYI the common issue I have when plugged in is that its not easy to unlock screen, takes me a 2-3 swipes to unlock screen and after that it seems that it ignores every other key press..
Any one reported this to Samsung? I will try to log a ticket to see what happens.

Try do a multi touch test while its plugged in see if the screens acting funny.

how do I do a multi-touch test?
what will that prove? as the screen works fine when unplugged.

I have the same issue but only when charging with the usb lead (with usb power adapter) instead of the standard mains charger. Think it might have stopped now that debugging is enabled and the Samsung kies screen doesn't come up when i connect the usb.
Sent from my GT-I9100 using XDA App

Took my phone 2 hours to charge from 36 % to 100 %

note this issue doesn't occur when charging via PC ONLY via 240V mains, but let me try with USB debugging on.
edit tried USB debbuging still has issue.
Note is the 240V USB cable different from a normal USB cable? ie perhaps the device thinks its a PC connection

the phone is laggy because of the electrical interference from a faulty charger or some other electrical equipment in the near vicinity...
Please note that actually the capacitive touchscreen becomes laggy not the applications/services...
keep it away from the electrical interference...use the samsung original charger..gud quality USB cable....and the issue will be gone... for sure

looks like its the charger, the A/C adapter I got with the phone was UK which is why I didn't use it to begin with, but tried the samsung one with a UK/AU adapter and its fine..
hmm who would have thought that was the issue...
interesting it didn't affect my other HTC phone.

Same issue here, but something special:
I ebayed another charger for my sgs2, original samsung one. Same serial number, same description, same style.. but i got the charging problem only with the new one.
With my original charger (the one, which was delivered with the phone) works fine. No slow and no lag.
The new one was about 5 euro, seems to be an original...

to demonstrate my point that its the electrical interference from the dodgy chargers onto the capacitive touchscreen... do this and report back...
plug the faulty charger onto the socket BUT DO NOT charge the phone with it...
keep the phone near to the charger wires etc....(not in charge)... you will see the screen lagging sometimes unresponsive...
now move the phone away ...it will work fine..
you can keep on using the dodgy chargers for charging...but use the phone only after it has been charged and is away from the charger...

woodstock_ahem said:
to demonstrate my point that its the electrical interference from the dodgy chargers onto the capacitive touchscreen... do this and report back...
plug the faulty charger onto the socket BUT DO NOT charge the phone with it...
keep the phone near to the charger wires etc....(not in charge)... you will see the screen lagging sometimes unresponsive...
now move the phone away ...it will work fine..
you can keep on using the dodgy chargers for charging...but use the phone only after it has been charged and is away from the charger...
Click to expand...
Click to collapse
I am not able to reproduce that with my original charger. There is no lag or any other problem. Switching to my second "original" (ebay 5 €uro) samsung charger leads me direct to the lag and your description. First i thought my second one is not an original one, but because of your description there seems to be a diffrent quality on the original charger depending on it production date.. unit.. charge.. or whatever.

I bought a sgs2 from the UK, and have a UK to AUS converter on the stock charger and I have no lag when it's charging or near chargers.

Sorry. Not a problem here. Writing now and plugged. Very responsive.
Sent from my GT-I9100 using XDA Premium App

The electrical interference with the capacitive display is bullcrap since it needs electrical properties to respond. So it depends on whether your body has enough electrical properties.
So back to the point:
It is due to CPU reducing the clock speeds to prevent the phone from overheating as the battery itself produces enough heat anyway.
Many other people may not notice it since they may not perform intensive tasks while the phone is plugged in and the variation itself is also almost unnoticeable.
I have the same issue but as I said, it's almost unnoticeable to even bring it up in this forum. I haven't done any testing myself to prove this, but the same safety feature is implemented in most modern phones.

I have the same issue - I also had this issue with my Atrix.

[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
Click to expand...
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

[Q] Missing pin on stock USB cable or normal design?

Hello everyone, I happen to notice that my stock N4 USB cable has a possible missing contact pin (not sure what to call it). The only other USB cables I have to compare it to are Samsung cables and all the pins are there. I'm curious if that pin is left out by design or it is a defect. Without knowing if it's left out for a reason. I have been reluctant to use my other cables because they do have that extra pin. I'm thinking maybe more pins could be bad if the N4 wasn't designed for it? So my question is, do you folks have all the pins on your stock N4 USB cables. Thanks in advance, Peace.
PS I have had two charging discrepancies since I've owed the phone. Twice when I plugged in (wall socket) my phone shot up to 100% instantly. I had to unplug, power down, plug back in, and power back on to get the proper battery reading again.

Mine appears to be missing too. Maybe it is built that way. I didn't notice until I just checked. I haven't had any problems with file transfers using the cable with my computer or with charging.
Edit: Found this thread on another forum that explains 2 other users having the same issue with their nexus 4s. It appears to be normal. http://forums.androidcentral.com/google-nexus-4/246222-nexus-4-oem-usb-cable.html

Check out the other end. You should only have 4 contacts there too.
They build it like that to save money (less metal). You only need 4 contacts for a USB cable. (The phone side will have all 5 for use in slim port, OTG, etc.)
From left to right in your picture you have:
Ground
Data-
Data+
Voltage
And that's all ya need.
Sent from my Nexus 4 using Tapatalk 2

[Q] Nexus 7 Not charging/USB not detected while turned on

My nexus 7 recently started to behave weirdly, it doesnt charge while turned on, neither with USB or AC. It does charge perfectly well when turned off.
I am unable to use the USB either no device is detected, nor in normal mode, USB debugging, fastboot or adb.
Please help me to get this USB brick fixed on my Nexus 7 asap.
Please help developers!

santan007 said:
My nexus 7 recently started to behave weirdly, it doesnt charge while turned on, neither with USB or AC. It does charge perfectly well when turned off.
I am unable to use the USB either no device is detected, nor in normal mode, USB debugging, fastboot or adb.
Please help me to get this USB brick fixed on my Nexus 7 asap.
Please help developers!
Click to expand...
Click to collapse
I've had this problem for a few weeks now and have yet to find a solution.

I'm quite astonished I haven't found a fix for this either. I have yet to open mine up ... I'm try to get the bootloader relocked, so I can warranty the dumb thing. But since it's not recognized by USB when powered on, I can't.

Have you tried putting pressure on the cable when it's plugged in? Also are you using the factory cable?
Sent from my Nexus 7(2012) that has zero issues.

SlowCobra96 said:
Have you tried putting pressure on the cable when it's plugged in? Also are you using the factory cable?
Sent from my Nexus 7(2012) that has zero issues.
Click to expand...
Click to collapse
Yep ... Tried pushing. Pulling. Etc. Factory cable. Non factory. Doesn't seem to matter. Anything I use charges fine off. Once on ... No juice
Sent from my EVO using Tapatalk 4

cmonsterf50 said:
Yep ... Tried pushing. Pulling. Etc. Factory cable. Non factory. Doesn't seem to matter. Anything I use charges fine off. Once on ... No juice
Sent from my EVO using Tapatalk 4
Click to expand...
Click to collapse
Unfortunately it is a hardware failure. Most likely the USB port assembly. It is possible there is a loose ribbon cable connection.

Nexus 7 not charging
I have the same problem. My Nexus 7 will not charge when turned on. It will not now connect to my pc. I have checked the drivers and all are ok.
It happened a few days ago Its rooted. I can restore backups that are on my Nexus through rom manager, but still the same problem. I thought of doing a factory reset, but if it will still not connect to my pc. I will loose the data. If it is a hardware usb port failure, what is the next stop

I know this is going to sound strange but open up the back of the Nexus and you will find your battery... And you will notice that it's loose you have to plug or wedge it back on to the battery clip it comes loose overtime use a credit card or similar to open the case :thumbup: success
sent from my t mobile S4

krazierokz said:
I know this is going to sound strange but open up the back of the Nexus and you will find your battery... And you will notice that it's loose you have to plug or wedge it back on to the battery clip it comes loose overtime use a credit card or similar to open the case :thumbup: success
sent from my t mobile S4
Click to expand...
Click to collapse
Thanks for reply, already checked battery and connections. It charges perfect when not switched on, that's what I find strange. It also charges when connected to my pc

sorry man good luck was hoping i could shed some light LOL

Did you find an answer, I also have the same problem
Sent from my Nexus 7 using xda app-developers app

Nexus 7 not charging/USB not detected while turned on
mswin341 said:
Did you find an answer, I also have the same problem
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
Has anybody else had the same problem, if so, how did you overcome it.

Similar thing happened to me... No amount of pressure or angling of the charging port would work. Batteries ran dead as a result. Sent it to the service center and they would assess it for 2-3 days and try to repair since it is under warranty. I'm gonna get an official dock to try and save the charging port from the stress of always being in use although I know that's not the only factor at play.

Nexus 7 not charging/USB not detected while turned on
raylgo said:
Similar thing happened to me... No amount of pressure or angling of the charging port would work. Batteries ran dead as a result. Sent it to the service center and they would assess it for 2-3 days and try to repair since it is under warranty. I'm gonna get an official dock to try and save the charging port from the stress of always being in use although I know that's not the only factor at play.
Click to expand...
Click to collapse
That's sounds a good idea with the official dock for charging, but you should not have to do that.
To much usage of the micro usb port is going to give problems. I'm always connected to my pc, downloading roms ect. but as I said before, my N7 charges perfectly when not turned on.

Nexus 7 not charging/USB not detected while turned on
As I can't connect my N7 to my pc. Is there anyway to revert to stock. Need to return for repair. USB port not working as it should.
N7 is rooted

I have the same problem
Does anybody solve this issue?
I have the same problem, please help me
Write me to [email protected]
Thx

Nexus 7 not charging/USB not detected while turned on
Unimetano said:
Does anybody solve this issue?
I have the same problem, please help me
Write me to [email protected]
Thx
Click to expand...
Click to collapse
I think the only answer is a faulty USB connection.
I tried to change mine and finished up snapping the connectors. :crying:
Now have one useless N7

Long story short: plugged the n7 into the car's OEM stereo USB port on a long trip and it registered as a device with the stereo and let me play some music off of it, when I woke up a couple hours later it wouldn't charge.
After a short bit of troubleshooting, I found that OTG devices were still working but it would only charge if I shut it right down - if I start it charging while it's turned off and leave the charger attached while powering it up it's not detected by the software so it never says it's charging, but does still charge - though if at any point I pull the charger from either the n7 or it's supply I have to shut it right down again to get it to charge. Unfortunately, the same can't be said of a PC USB device connection (aside from the charging part of course.)
After a couple weeks using it like this, I got my hands on a multimeter (my stuff is all packed in storage indefinitely or I'd have been replying to this topic sooner) and confirmed that I never register anything beyond a few millivolts on the detect/sense pin (which I find very odd as it's supposed to have a pull-up) with nothing attached to the usb port, and that aside from a short time in fasboot that unless the n7 is powered right off it's trying to supply 5V to the USB connector. I attempted to use the faux123 kernel that has options to disable this power to allow host+charging (and my hope was to slow the battery rundown to make it more usable even if I have to shut it off to charge it), but the n7 appears to ignore this and still powers the USB connector.
In this case it most definitely is NOT the IO/USB/headphone assembly inside the unit. At the moment I'm operating on the theory that Asus skimped on protection circuitry in the charge circuit as in my mind this type of damage should never occur when it's properly designed, and I'm presuming the motherboard dead with regards to being a USB device - too bad my warranty is likely up, though I can't check that as it was a gift and all the paperwork is buried in storage. Thankfully it's still capable of fast charging when off, though this doesn't leave me very happy as this also effectively takes away most recovery options if fastboot is the only thing left working.
If I manage to source a replacement mobo I will work on doing a post-mortem and seeing if it's down to a faulty component (I've seen this sort of behaviour before, a pulled up line not getting pulled up, when a filtering capacitor decides to go flakey.) More likely though I'll either sell it, give it away or put it on the junk pile with the rest of the Asus products I've had to retire in the last month due to their questionable customer support (the other products were due to Asus deciding they were "legacy products" and not updating drivers for windows 8/8.1 despite only being 5 years old.)

Nexus 7 not charging/USB not detected while turned on
joeblowma said:
Long story short: plugged the n7 into the car's OEM stereo USB port on a long trip and it registered as a device with the stereo and let me play some music off of it, when I woke up a couple hours later it wouldn't charge.
After a short bit of troubleshooting, I found that OTG devices were still working but it would only charge if I shut it right down - if I start it charging while it's turned off and leave the charger attached while powering it up it's not detected by the software so it never says it's charging, but does still charge - though if at any point I pull the charger from either the n7 or it's supply I have to shut it right down again to get it to charge. Unfortunately, the same can't be said of a PC USB device connection (aside from the charging part of course.)
After a couple weeks using it like this, I got my hands on a multimeter (my stuff is all packed in storage indefinitely or I'd have been replying to this topic sooner) and confirmed that I never register anything beyond a few millivolts on the detect/sense pin (which I find very odd as it's supposed to have a pull-up) with nothing attached to the usb port, and that aside from a short time in fasboot that unless the n7 is powered right off it's trying to supply 5V to the USB connector. I attempted to use the faux123 kernel that has options to disable this power to allow host+charging (and my hope was to slow the battery rundown to make it more usable even if I have to shut it off to charge it), but the n7 appears to ignore this and still powers the USB connector.
In this case it most definitely is NOT the IO/USB/headphone assembly inside the unit. At the moment I'm operating on the theory that Asus skimped on protection circuitry in the charge circuit as in my mind this type of damage should never occur when it's properly designed, and I'm presuming the motherboard dead with regards to being a USB device - too bad my warranty is likely up, though I can't check that as it was a gift and all the paperwork is buried in storage. Thankfully it's still capable of fast charging when off, though this doesn't leave me very happy as this also effectively takes away most recovery options if fastboot is the only thing left working.
If I manage to source a replacement mobo I will work on doing a post-mortem and seeing if it's down to a faulty component (I've seen this sort of behaviour before, a pulled up line not getting pulled up, when a filtering capacitor decides to go flakey.) More likely though I'll either sell it, give it away or put it on the junk pile with the rest of the Asus products I've had to retire in the last month due to their questionable customer support (the other products were due to Asus deciding they were "legacy products" and not updating drivers for windows 8/8.1 despite only being 5 years old.)
Click to expand...
Click to collapse
Very Interesting
I am sure you are right, but I'm not qualified to agree or disagree.
I have had quite a few Asus products in the past and never had any problems.

My Nexus 7 (2012) was also charging properly. I only have the issue that it only charge when turned off AFTER I charged it:
(1) using car charger; and
(2) charge it using official charger but inside a train using train's power plug
So it seems that these devices really need a normal wall-charging paired with official charger.. otherwise, something bad might happen..
Has anyone tried to use Wireless Charger? does it work?