Database Info

Got a New Charger, Now the Screen Doesn't Work While Plugged In!

Hello all,
So I just bought a new charger (just a wall charger) and now when I plug my TB in, the screen does not respond to anything! I have to take the plug out to work my screen. It is completely unresponsive (regardless of where I'm at on the screen) while charging. As soon as I unplug it, it's fine.
Any ideas?

Where did you buy the charger from? Some crappy no-name/ebay/cheap chargers do that because they are crap. I had bought a cheap charger for my HTC Touch Pro 2 and that same thing happened, used the regular charger, no problems at all.

I know when I used the charger and cable that came with the thunderbolt, it used to become laggy or less responsive. Not terrible, but I could notice it. It was like all the memory was tied up. It doesn't do it anymore though. I rarely use the original cable and charger anyways.

g00s3y said:
Where did you buy the charger from? Some crappy no-name/ebay/cheap chargers do that because they are crap. I had bought a cheap charger for my HTC Touch Pro 2 and that same thing happened, used the regular charger, no problems at all.
Click to expand...
Click to collapse
Indeed. The cheap $1.00 chargers may also harm your battery.

daniel178 said:
Hello all,
So I just bought a new charger (just a wall charger) and now when I plug my TB in, the screen does not respond to anything! I have to take the plug out to work my screen. It is completely unresponsive (regardless of where I'm at on the screen) while charging. As soon as I unplug it, it's fine.
Any ideas?
Click to expand...
Click to collapse
Today I tried to charge my phone at work using my original.al charger that I always use and while it was plugged in, the screen wouldn't respond at all. I thought the phone was the problem but I later troubleshot it to low voltage from the extension cord, not my charger.

There are in fact quite a few micro-usb chargers that cause the screen to become unresponsive when plugged in.. This doesn't necessarily mean that the charger is crap, but it's best to use your manufacturer-approved (oem) chargers whenever possible. I work in wireless, and although our supplier is reputable, their generic chargers don't work well with the Atrix & a few other smartphones. I use them only when necessary, but do your phone a favor & stick to manufacturer chargers.

I had this problem, when I use a properly grounded surge protector the problem doesn't happen any more. It also happens to me when I charge out of my old macbook pro which tends to have a 'staticy' feel to it.

zoso28 said:
There are in fact quite a few micro-usb chargers that cause the screen to become unresponsive when plugged in.. This doesn't necessarily mean that the charger is crap, but it's best to use your manufacturer-approved (oem) chargers whenever possible...
Click to expand...
Click to collapse
You're two months late with your incorrect post. There's a well defined standard for USB chargers, which the TB follows. Non-OEM ones work every bit as well as the HTC one as long as they, too, follow the standard and provide clean power.

mike.s said:
You're two months late with your incorrect post. There's a well defined standard for USB chargers, which the TB follows. Non-OEM ones work every bit as well as the HTC one as long as they, too, follow the standard and provide clean power.
Click to expand...
Click to collapse
Sorry my timing bothered you I was just browsing around for info about the touchscreen issues i've seen. I'm well aware of the standard, 5 +/- 0.25 volts 500–900 mA, and they all seem to charge perfectly well but certain phone/charger combos cause some screens to lag & I just wondered why. For example the motorola adapters all seem to be 5.1 volts @ 850mA, whereas samsung adapters are 5.0 volts @ 700 mA, and the samsungs charge fine on our standard 5/500's while the moto's lag.

zoso28 said:
SI'm well aware of the standard, 5 +/- 0.25 volts 500–900 mA, and they all seem to charge perfectly well but certain phone/charger combos cause some screens to lag & I just wondered why. For example the motorola adapters all seem to be 5.1 volts @ 850mA, whereas samsung adapters are 5.0 volts @ 700 mA, and the samsungs charge fine on our standard 5/500's while the moto's lag.
Click to expand...
Click to collapse
It's not clear where the "500-900 mA" and "standard 5/500" figures you give come from. Neither is from the USB Battery Charging Specification.
The spec supports up to a 1.5 A current from a Dedicated Charging Port. The HTC charger is rated at 1 A, and it seems the TB will use all of it. I've seen charging rates of 800 mA, with the phone also running screen, GPS, and more.
Cheap ones, regardless of output, may be poorly filtered with a significant AC component. Those are the ones which will really cause problems.

Touchscreen issues when charging

Anyone having issues with your touch screen when you are using it while it's chArging? Just wondering if i have a faulty device or are there others with the same problem
Sent from my HTC One X using xda premium

No my device does not have this issue when charging. I think this issue has something to do with the charger.

That's a grounding problem, had it with my SGSII try a different cable.

The sensation had an issue of touchscreen problems while charging. i went through 3 phones. The cause is the same cause as the wifi errors that people are having with the HOX. Bad connection from unibody(sensation) to board.. If we added aluminum foil or solder (just like the HOX wifi issue) it would fix the problem. On the sensation the problem got really bad to where you couldnt unlock the phone with the lockring. grounding issue. I hope the HOX isnt having that same issue and you just have a bum phone or better yet a bum cord or charger. let us know if its either

yeah happened alot on my s2, was due to usb cable or something
but works fine when im charging

It was the grounding issue, does this damage the phone? I have a wall outlet with USB ports so it might emit too much power
Sent from my HTC One X using xda premium

slojko said:
It was the grounding issue, does this damage the phone? I have a wall outlet with USB ports so it might emit too much power
Sent from my HTC One X using xda premium
Click to expand...
Click to collapse
Every time this has happened it has been because of what the USB cable was plugged in to and not the cable itself. Try the charger it came with in a regular plug. If it doesn't work better then it is a phone problem.

This happens to me too. Charging from the laptop with an eBay (chinese) cable causes the touchscreen to be unresponsive.
Here's how to test: Open the Notes and draw a few lines very fast.
Here's the results:
USB Charging
No USB Charging

Here is a video of it happening to me on my skyrocket. It was because of the charger. Try a different cable, then a different wall adapter.
http://www.youtube.com/watch?v=x__jdlGXyjk

It is because of the charger...it's always recommended to use the charger that came with the phone eventhough they give us a tiny a$$ USB cable.
Sent from my HTC One XL using Tapatalk 2

Yes, I have an issue - when the phone gets to 90%+ while charging, the screen becomes very unresponsive. The drags don't drag - instead the touches are registered as taps.
You can get an app like MultiTouch Test - and you will see, it's very clear to see when this happens.
My first One X device did not have this issue, so it's something specific to my current unit. Doesn't bother me much, since it only happens at 90%+ charge, while plugged in...

neocryte said:
My first One X device did not have this issue, so it's something specific to my current unit. Doesn't bother me much, since it only happens at 90%+ charge, while plugged in...
Click to expand...
Click to collapse
To me it doesn't happen all the time, sometimes it happens, sometimes it doesn't. Unplugging the cable and plugging it back in seems to temporarily fix the problem, if I leave it charging for a couple more minutes, I think the problem will come back, but again, unplugging/plugging it back, solves it temporarily. It's weird...
Oh, and all this to say that I observed this behavior while charging around 65%, not 90%. And I've only observed this while charging with AC power with the original cable and charger. The problem did not present itself (yet) while charging through USB.

Touchscreen While Charging
Nazgulled said:
To me it doesn't happen all the time, sometimes it happens, sometimes it doesn't. Unplugging the cable and plugging it back in seems to temporarily fix the problem, if I leave it charging for a couple more minutes, I think the problem will come back, but again, unplugging/plugging it back, solves it temporarily. It's weird...
Oh, and all this to say that I observed this behavior while charging around 65%, not 90%. And I've only observed this while charging with AC power with the original cable and charger. The problem did not present itself (yet) while charging through USB.
Click to expand...
Click to collapse
I just had this happen with the stock charger from my old HTC One using it on my HTC One X. Along with touchscreen problems it got VERY hot located as you are looking at the camera side it got hot on the top right side near the camera. Dunno what that could be. Both chargers are rated at the same voltage and amperage, I dont get it
jmdwyer

jmdwyer said:
I just had this happen with the stock charger from my old HTC One using it on my HTC One X. Along with touchscreen problems it got VERY hot located as you are looking at the camera side it got hot on the top right side near the camera. Dunno what that could be. Both chargers are rated at the same voltage and amperage, I dont get it
jmdwyer
Click to expand...
Click to collapse
It's caused by electrical noise. The voltage supplied from your mains outlet is alternating current (typically 50/60hz in frequency). a usb charger has to do two things; firstly step down the voltage (110v/230v/240v down to 5v) and secondly rectify the alternating current into direct current (positive and negative). how it does this is by using a transformer which employs an iron core surrounded by copper windings, this generates a lot of rf (radio) which travels down the cables to the device as well as broadcasting a short distance through the air, a decent charger will use shielding as well as a few other pieces of circuitry which will neutralize the rf given off. In order to rectify the voltage the charger will use a variety of diodes and capitors, in a cheap Chinese charger they will typically use as little as 2 and possibly a generic chemical capacitor (similar to a small battery) these degrade over time and can get quite hot, fat and eventually burst - when you hear about chargers exploding or setting on fire it's usually because the capitors aren't up to the job. a Chinese charger may have all the quality control and certification stamps but most of them are forged, if you buy a charger for less than $10 this is what your likely to end up with. the outputted voltage may appear 5v on a multimeter but they are a very dirty output and can spike from 3v to 7v or even more the load on the charger increases. The dirty output interferes with the mechanism used on touch screen devices which also employ a type of capacitance to register where you are pressing on the screen. A decent charger will use solid state capitors and which should last a lifetime.
if the smartphone miss behaves whilst charging 90% of the time it's because of a faulty charging device (or one employing poor components). a decent charger may cost more $20 but they are significantly safer for both you and the device.
The problem with mains sockets with built in usb usually comes down to shielding, they will either have none or be earthed (which might sound like a good idea but in practise a lot of domestic devices will create leakage to earth causing more noise - alot of studio equipment will have a separate earth). These may not be as dangerous as cheap Chinese chargers but still undesirable.
If a original or good quality charger isn't available one of the best sources for charging a phone will actually be a desktop pc with a usb3 port. The whole pc is insulated in a nice metal case and there are a plefora of high quality components to create a stable clean power supply (a cpu voltage tolerance is usually measured to 2 decimal places of a volt which is pretty good).
Ditch the rubbish cheap chargers, you honestly get what you pay for and they aren't good for the long term health of the phone. If it hums or makes a high pitch noise whilst plugged in your playing with fire - literally. they aren't bothered if your phone dies in 6 months or bursts into flames so long as they get the $5 x 100,000 people who buy them (these things literally cost pennies for them to put together, even though the case might look the business inside they are nasty and as cheap as)
Sent from my HTC One XL using Tapatalk

Very insightful. The worst part is that I have two original HTC chargers and they both emit the high pitched noise.
Sent from my Evita

timmaaa said:
Very insightful. The worst part is that I have two original HTC chargers and they both emit the high pitched noise.
Sent from my Evita
Click to expand...
Click to collapse
Some of the very small chargers might whistle a little, its called coil noise and isn't as bad as capacitors about to pop. The iron core hasn't been sufficiently dampened or glued into the case so it resonates when the ac passes through it, the pitch may change depending on the voltage (whether its a 230v or 110v power supply). It isn't unsafe but HTC should be doing a better job at checking the new chargers, over time most chargers will develop coil noise as glue tends to melt or degrade.
Very insightful video, you'll never buy a cheap charger again
https://www.youtube.com/watch?v=wi-b9k-0KfE&feature=youtube_gdata_player
The gist being the cheap chargers could very well set on fire and the USB could go live at mains voltage with no circuit protection, death traps spring to mind. Be careful what you buy.
Sent from my K701HBC using Tapatalk

Moto G becomes unresponsive while on wall/usb charging

My post
http://forum.xda-developers.com/showthread.php?p=50175477
2 people confirmed this. Example: http://forum.xda-developers.com/showpost.php?p=50199069&postcount=857
Any solution?

Use another wall charger..i got same problem fixed using another one

asdfzz said:
Use another wall charger..i got same problem fixed using another one
Click to expand...
Click to collapse
this is the one which comes from Motorola(OEM).

Seadra said:
this is the one which comes from Motorola(OEM).
Click to expand...
Click to collapse
Your charger may be defective. Usually with voltage irregularities you start getting issues with the digitizer and other components. Try plugging into your computer's USB and see if it still occurs.

Seadra said:
My post
http://forum.xda-developers.com/showthread.php?p=50175477
2 people confirmed this. Example: http://forum.xda-developers.com/showpost.php?p=50199069&postcount=857
Any solution?
Click to expand...
Click to collapse
i am using Samsung Galaxy Note i face this problem while charging. 2 pin shoe / plug
i solve this problem by changing the polarity of charger i.e by swapping pins/changing pins.

I can confirm this, same problem both with USB and wall charger
Sent from my XT1033 using Tapatalk

Hi guys,
This is a well known problem with capacitive touch screens [Parasitic capacitive coupling effect]
this is due to poor quality of power from electricity grid. Your A/C adapter has nothing to with it
even laptop trackpads are susceptible to this problem[they also use capacitive sensing]
Solution: Remove laptop charger and charge your phone using your data cable. Now you wont have this problem because you are charging from laptop battery.

Find a wall charger that does a better job of filtering your wall power.

I had this problem while using a samsung cable, after changing it to an lg one it worked fine, even with the same charger. I'm sure the one supplied would be fine. Otherwise change the wall charger as others have stated.
I was using another cable as it was longer than the one supplied.

Hello, If this is a commonly seen problem in capacitive touch screens then why my other devices [with capacitive screen] are not having the same problem? With the same charger and same power socket?
Also, is there a work around for those who doesn't have a laptop?

It has nothing to do with the touch screen. I assume it is a current/ compatibility issue between the device/ cable and charger. I had problems transferring data with other devices when using specific cables too.
I've noticed that my Samsung 0.7 output amp charger charges the moto g significantly faster than my lg 1.2 amp charger even though both are 5v. It should be able to take up to a 1.5amp current, any higher will be restricted by the device.
Sent from my XT1032 using xda premium

I want the moderator to ban me.

I suffer this problem when I connect my moto g to my pc and i use it. The touchscreen gets doesn't response well, but if I connect the phone to the USB-charger the screen works perfect.

S ame in G alaxy Ace 2.

The same happens to me when I use an Apple charger. Any other is allright.
Solution -> use another charger.

[Q] Phone warm when charging wirelessly?

I just got myself a Nokia DT-900 Wireless charger (Got it at a clearance at the Nokia store) for use with my Nexus 5 and my Nexus 7.
I charged the nexus 5 with it now. While it charges perfectly, even with a case on, the back of the phone gets a little warm. Not hot, just warm. I was wondering if this is any cause for concern, or if this is normal. Have not tried with my nexus 7 though.
Does the nexus 5/7 work perfectly with the Nokia wireless charger, or is it Incompatibility that is causing the phone to warm up a little?

srivas95 said:
I just got myself a Nokia DT-900 Wireless charger (Got it at a clearance at the Nokia store) for use with my Nexus 5 and my Nexus 7.
I charged the nexus 5 with it now. While it charges perfectly, even with a case on, the back of the phone gets a little warm. Not hot, just warm. I was wondering if this is any cause for concern, or if this is normal. Have not tried with my nexus 7 though.
Does the nexus 5/7 work perfectly with the Nokia wireless charger, or is it Incompatibility that is causing the phone to warm up a little?
Click to expand...
Click to collapse
I noticed the same thing with a LG Qi charger. This is my first wireless charger and I believe that it's normal.

Primokorn said:
I noticed the same thing with a LG Qi charger. This is my first wireless charger and I believe that it's normal.
Click to expand...
Click to collapse
If the same thing happens with the Official LG Nexus charger, then it must be normal. Thanks!

srivas95 said:
If the same thing happens with the Official LG Nexus charger, then it must be normal. Thanks!
Click to expand...
Click to collapse
It's actually this one: http://www.amazon.com/LG-Electronics-WCP-300-Wireless-Charging/dp/B00C6VP03I

Primokorn said:
It's actually this one: http://www.amazon.com/LG-Electronics-WCP-300-Wireless-Charging/dp/B00C6VP03I
Click to expand...
Click to collapse
As it's an LG, I doubt it's any different from the Nexus one. Both have the same specs. Have emailed Google regarding this, their reply was the standard 'We do not recommend using Non-Nexus chargers for Nexus devices'. I told them all QI chargers were actually supposed to work, and am awaiting their reply. Will follow up on this.

i get worried with how wireless charging heats up my phone, so i try to avoid it

Enddo said:
i get worried with how wireless charging heats up my phone, so i try to avoid it
Click to expand...
Click to collapse
I bought a QI wireless charger when I purchased the phone based on excellent reviews on Amazon. I've since stopped using it just because of random overheating and generally the phone was warmer than when charging via USB. It was a feeling that overtime my phone would suffer.
Sent from my Nexus 10 using XDA Premium HD app

3DSammy said:
I bought a QI wireless charger when I purchased the phone based on excellent reviews on Amazon. I've since stopped using it just because of random overheating and generally the phone was warmer than when charging via USB. It was a feeling that overtime my phone would suffer.
Sent from my Nexus 10 using XDA Premium HD app
Click to expand...
Click to collapse
my thoughts exactly

Wireless charging, by its very nature, generates a small amount of heat. It is perfectly normal for your phone to get a bit warm whenever you're charging via any means, but especially when wireless charging. The key is the phrase "a bit warm." It should never be hot to the touch, just warm. The phone was designed to handle this, and there will be no adverse effects. In fact, the heat generated is much less than is generated by the CPU during heavy use (such as during a graphic intensive game).
I regularly use my phone with the official nexus charger (in my car), the Nokia DT-910 (the stand-up version of the DT-900 -- my main overnight charger), and the Samsung S-Charger Pad (at work). All are perfectly compatible with the N5. In fact, the only name-brand charger I'd steer clear of is the Tylt Vu, because there have been numerous incidents of overheating with that charger (i.e., the phone gets very hot to the touch).

3DSammy said:
I bought a QI wireless charger when I purchased the phone based on excellent reviews on Amazon. I've since stopped using it just because of random overheating and generally the phone was warmer than when charging via USB. It was a feeling that overtime my phone would suffer.
Sent from my Nexus 10 using XDA Premium HD app
Click to expand...
Click to collapse
Sent google a screenshot of my Battery info and temp while it was at max temp, they said there are no issues with it

jt3 said:
Wireless charging, by its very nature, generates a small amount of heat. It is perfectly normal for your phone to get a bit warm whenever you're charging via any means, but especially when wireless charging. The key is the phrase "a bit warm." It should never be hot to the touch, just warm.
I regularly use my phone with the official nexus charger (in my car), the Nokia DT-910 (the stand-up version of the DT-900, and my main overnight charger), and the Samsung S-Charger Pad (at work). All are perfectly compatible with the N5. In fact, the only name-brand charger I'd steer clear of is the Tylt Vu, because there have been numerous incidents of overheating with that charger (i.e., the phone gets very hot to the touch).
Click to expand...
Click to collapse
Yep, I read online that the Tylt Vu has some issues.
I spoke to Google about the Nokia charger, and they said the temp of the phone is normal. They did warn me that the Nokia does not cut charging automatically when it gets to 100%, and that I should Take it off manually

Using a case increases the distance between the phone and coil which can cause the phone to heat up even more. Even wired charging heats the battery so some extra warmth from the 25% lost energy seems normal.
Sent from my Nexus 5 using Tapatalk

bblzd said:
Using a case increases the distance between the phone and coil which can cause the phone to heat up even more. Even wired charging heats the battery so some extra warmth from the 25% lost energy seems normal.
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
Okay, Maybe I should remove the case and try charging it

jt3 said:
Wireless charging, by its very nature, generates a small amount of heat. It is perfectly normal for your phone to get a bit warm whenever you're charging via any means, but especially when wireless charging. The key is the phrase "a bit warm." It should never be hot to the touch, just warm. The phone was designed to handle this, and there will be no adverse effects. In fact, the heat generated is much less than is generated by the CPU during heavy use (such as during a graphic intensive game).
Click to expand...
Click to collapse
Lots of people who use wireless chargers say this but I am still skeptical. I would like to see battery capacity tests from two of the same devices. One that was only charged with wireless charging and the other only charged via USB.
My money says the wireless charged device will have significantly less battery capacity than the usb charged device after 1-2 years of use.

Enddo said:
Lots of people who use wireless chargers say this but I am still skeptical. I would like to see battery capacity tests from two of the same devices. One that was only charged with wireless charging and the other only charged via USB.
My money says the wireless charged device will have significantly less battery capacity than the usb charged device after 1-2 years of use.
Click to expand...
Click to collapse
Yes, But seeing as most of us use the phone for only 1-2 years, I personally don't see a difference. Maybe the battery will lose capacity over time, but that's going to happen anyway. This will maybe speed up the process by about 20%.

Enddo said:
My money says the wireless charged device will have significantly less battery capacity than the usb charged device after 1-2 years of use.
Click to expand...
Click to collapse
That may be true, but that argument lies on shaky ground, since there are a lot of other ways you can (theoretically) reduce battery life as well. In theory, not allowing the battery to drain completely during each charge cycle, or not removing the phone from the charger the instant it's fully charged can reduce battery life, yet nobody charges their phone that way. There's also the counter-argument that plugging the charging cable in every single day can prematurely wear out, or break, the (very fragile) USB connector on the phone, which would result in the inability to charge at all. (I went through SOOO many Galaxy Nexuses... Nexes? Nexii? Whatever... because of that issue.)
The point is that sometimes, convenience takes priority over the possibility of slightly reduced battery life, and it's hard to argue against the convenience of wireless charging.
Plus, as Srivas95 stated, most of us will move on to the next device long before any such battery degradation becomes an issue.

jt3 said:
That may be true, but that argument lies on shaky ground, since there are a lot of other ways you can (theoretically) reduce battery life as well. In theory, not allowing the battery to drain completely during each charge cycle, or not removing the phone from the charger the instant it's fully charged can reduce battery life, yet nobody charges their phone that way. There's also the counter-argument that plugging the charging cable in every single day can prematurely wear out, or break, the (very fragile) USB connector on the phone, which would result in the inability to charge at all. (I went through SOOO many Galaxy Nexuses... Nexes? Nexii? Whatever... because of that issue.)
The point is that sometimes, convenience takes priority over the possibility of slightly reduced battery life, and it's hard to argue against the convenience of wireless charging.
Plus, as Srivas95 stated, most of us will move on to the next device long before any such battery degradation becomes an issue.
Click to expand...
Click to collapse
which is fine. i just plan on using my N5 longer than a couple years and will do what i can to keep it as healthy as possible

Enddo said:
which is fine. i just plan on using my N5 longer than a couple years and will do what i can to keep it as healthy as possible
Click to expand...
Click to collapse
Whatever works for you man. To each his own

joneytatya said:
Have you been using the official nexus charger? Mine used to heat the phone earlier before I bought this one from Amazon:
http://www.amazon.com/Nexus-Wireless-Charger-Smartphones-Tablets/dp/B00GN1YKBU
Click to expand...
Click to collapse
I tried with my friend's Official Nexus Charger, Phone still got a little warm. It's okay though, Now that Google have confirmed it with me. No issues

jt3 said:
That may be true, but that argument lies on shaky ground, since there are a lot of other ways you can (theoretically) reduce battery life as well. In theory, not allowing the battery to drain completely during each charge cycle, or not removing the phone from the charger the instant it's fully charged can reduce battery life, yet nobody charges their phone that way. There's also the counter-argument that plugging the charging cable in every single day can prematurely wear out, or break, the (very fragile) USB connector on the phone, which would result in the inability to charge at all. (I went through SOOO many Galaxy Nexuses... Nexes? Nexii? Whatever... because of that issue.)
The point is that sometimes, convenience takes priority over the possibility of slightly reduced battery life, and it's hard to argue against the convenience of wireless charging.
Plus, as Srivas95 stated, most of us will move on to the next device long before any such battery degradation becomes an issue.
Click to expand...
Click to collapse
What you say is right, my Nexus 5 has been with me for just 4 months and I can already see that the jack is kind of loose. That is one of the reasons I got a wireless charger in the first place.

Shield Tablet touchscreen lag while charging explained

Hello,
I have the SHIELD Tablet, and like many of us had problems with a laggy touchscreen when certain chargers were used. It only happened by some, but not by all.
Using a USB volt and current meter, I was able to identify the cause of the problem.
First some technical background. USB ports and chargers always should give 5 volt. Small variances are allowed, and usually not a problem. Some chargers will drop the voltage a little under load, which also should not be a problem. The current that can be delivered is variable and depends on what the device needs and the charger can handle. Too heavy a charger does not matter, too light a charger only makes the device charge slower, but no technical problems should be caused.
Now, I just yesterday received a new charger, and it has two ports, one for 1 amp of current, and one for 2.4. If the tablet is almost empty, it will try to draw about 1.7 Amps of current, and with the 2.4 amp charger, this will cause a drop from 5V to 4.7V. This also caused the touchscreen to lag.
When I used the 1 amp port it could not charge as fast, but the voltage remained at 5 volt. Because of this the touchscreen did not lag.
So basically, a charger that drops its voltage too much will make at least some touch screens of the nvidia SHIELD lag. the problem can be solved by taking a charger that does not drop its voltage under load, which in my experience means a less heavy charger then is needed for optimal charging. I recommend using two chargers, if you cannot find a heavy one that does not drop its voltage too much.
Also, English is not my first language, so I apologize for any language issues.

One problem with this theory - I've checked the exact same thing and my charger doesn't drop voltage, but I DO experience touch screen delay. My guess is it's a capacitance issue.

Saeviomage said:
One problem with this theory - I've checked the exact same thing and my charger doesn't drop voltage, but I DO experience touch screen delay. My guess is it's a capacitance issue.
Click to expand...
Click to collapse
Well I don't have the equipment to test this but I have a Quickcharger 2.0 which came with my LG V10 and a normal charger that came with my girlfriend's LG G4 and I have had no problems with the QC but the normal charger causes considerable lag to the touchscreen as well as making my swipes inverted some times.

marcolorenzo said:
Well I don't have the equipment to test this but I have a Quickcharger 2.0 which came with my LG V10 and a normal charger that came with my girlfriend's LG G4 and I have had no problems with the QC but the normal charger causes considerable lag to the touchscreen as well as making my swipes inverted some times.
Click to expand...
Click to collapse
Incidentally, I've seen the behaviour be present and absent on the same charger: moving a cable caused the touchscreen lag to show up and disappear, depending on its position.

Its not only the Charger, the cable also makes a big difference!

cyraxx84 said:
Its not only the Charger, the cable also makes a big difference!
Click to expand...
Click to collapse
In my experience, I was using the same charger for Samsung Note 4, was using a cheap cable and there was lag. Used original Samsung cable and the problem was gone.
Sent from my SHIELD Tablet K1 using XDA-Developers mobile app

This has been an issue with my Shield tablet that has absolutely driven me insane. I've searched online from time to time and there doesn't seem to be a lot of information out there about this, which surprises me.
My experience with touchscreen lag is significant when the tablet is plugged in. The tablet is UNUSABLE...let me repeat...UNUSABLE. I've used the original charger/cable, a 2.4 amp output charger with 20 and 22 gauge cables, and a Quick Charge 2.0 charger with the same cables. The only time I don't experience any lag is when I use the Quick Charge 2.0 charger (imagine my surprise and delight when I tried this!). I'm kind of anal about my cables so I ensure they are good ones.

I've been noticing another interesting experience I have been having.
I bought the PWR+ 3.5 amp charger, and I have no touchscreen lag issues on the STOCK 5.3 ROM. I used to have a Samsung Quick Charge cable and wall adapter, but sometimes it would simply not charge.... it was inconsistent.
So the PWR+ works with the stock ROM, but on ANY custom rom and kernel I've tried so far available on the XDA forums (great job btw devs), I get lag. I'm not sure why this is the case and its the biggest thing keeping me away from custom roms. Even flashing the original kernel and dbt file doesn't resolve the issue.