Develop Bugs

[Q] Crazy digitizer issues

Just activated a Epic 4G Touch last night. Been playing with it pretty much ever since but I'm having a strange problem with what appears to be the digitizer. If I put my finger on the lock screen and hold it there at times it will start jumping around in a crazy fashion. Is this behavior normal for the lockscreen?
It will also sometimes stop half-way through a homescreen pan in touchwiz and otherwise behave strangely and/or unresponsive sometimes selecting things that I have not pressed. The keys on the bottom are also sometimes unresponsive. Anyone else having a similar issue?
I did root it but did didn't mess with the kernel or anything else. I used this method:
http://forum.xda-developers.com/showthread.php?t=1282418
I haven't seen any posts relating to this so perhaps I have a defective phone. Anyone know if a Sprint store would swap it out or do I have to send it back to Amazon (where I purchased it)?

It appears to be due to the wall-wart
Well, I've tracked the problem down. This digitizer issue only happens when I have the phone plugged into the wall using the Samsung 120VAC to USB adapter (the cube that came with the phone). No problem when the USB cable is plugged into the PC or through a different adapter that I had laying around.
Now I'm curious, can someone else try this: Plug in your phone with the Samsung adapter then turn it on and hold your finger on the screen... see if the lockstreen starts jumping around on you.
Thanks.

A number of people around here have noticed the problem including me.

Yeah man it's a known issue with pretty much everyone's phone. A small annoyance if I decide I want to use my phone after I've plugged it in for the night.
Also towards the end of the charge cycle and when it's fully charged, the problem will subside. Only when it's pumping a lot of power into the phone.

Try using a different adapter it works for me.I have my old Samsung captivate adapter and that does not happen anymore
Sent from my SPH-D710 using XDA App

I used another adapter and it works fine. Looks like there is a defect in the Samsung ones then... I'm just hoping its not doing any damange to the phone as it's obviously sending a lot of electrical noise into it. None of the local Sprint stores (I tried 3) would swap the adapter for me since I brought it on Amazon. I called them and they gave me credit to buy a new one so I'm happy.
Thanks for the responses, glad to have cleared this up. Going back to root.

http://forum.xda-developers.com/showthread.php?t=1264219
Sent from that damn ET 4-GEE!!

Problems with touch screen when screen is locked and phone is charging...

Since I thought my phone, I've noticed an annoying problem. When my phone is charging in the screen is locked, I go to unlock the phone and the touch screen seems to have a problem registering my touch for the pattern password.
I would unplug it for a second to draw the unlock pattern, unlock the phone, and then proceed about while the phone is plugged back in. Then out of nowhere, it'll do the same thing.
Anyone experiencing this?
Sent from my SGH-T989 using XDA App

m3trella97 said:
Since I thought my phone, I've noticed an annoying problem. When my phone is charging in the screen is locked, I go to unlock the phone and the touch screen seems to have a problem registering my touch for the pattern password.
I would unplug it for a second to draw the unlock pattern, unlock the phone, and then proceed about while the phone is plugged back in. Then out of nowhere, it'll do the same thing.
Anyone experiencing this?
Sent from my SGH-T989 using XDA App
Click to expand...
Click to collapse
There is another thread here somewhere that talks about the issues while being plugged in. I think this was one that was mentioned.
Sent from my SGH-T989 using xda premium

i am not getting that problem, but if you call tmobile im sure they will switch the phone.

I've had this problem - but only when I used a different charger from the one included (even though it's a Samsung charger). Are you using the cable included with the phone?

Yea it has happened on mine but only if it was laying down when i try to unlock it. once i pick it up it was fine
Sent from my SGH-T989 using XDA App

I can confirm this very issue on two GSII's I've used. It's annoying.
Sent from my SGH-T989 using XDA App

This is a known issue with all variants of the Galaxy S2.
The Galaxy S2 is very sensitive to input voltage, and if it doesn't like what it's getting, the touch screen calibration gets a little funky.
Voltage-regulated chargers (ones that are big and blocky or have a bulb on the wire) tend to work well.
Don't bother exchanging it over this, it won't change anything. You just need a better charger.

Yes, I'm using the same charger came with the phone. I guess we will just settle this issue with the fact that it just gets a little funky When plugged in.
Sent from my SGH-T989 using XDA App

Big thanks to everyone who responded to this thread, hopefully we can figure out what the problem is in the near future
Sent from my SGH-T989 using XDA App

manekineko said:
This is a known issue with all variants of the Galaxy S2.
The Galaxy S2 is very sensitive to input voltage, and if it doesn't like what it's getting, the touch screen calibration gets a little funky.
Voltage-regulated chargers (ones that are big and blocky or have a bulb on the wire) tend to work well.
Don't bother exchanging it over this, it won't change anything. You just need a better charger.
Click to expand...
Click to collapse
better charger yes
phone being sensitive not really
all Properly build chargers will not cause that problem
i purchase cheap 2A charger from Deal Extreme, but those are build good, not like some of the crappo accessories from ebay
BlackBerry chargers works good too

I have the same problem.
As many of you guys said, a good charger is needed for a stable voltage input.
I have no problems charging from the original charger and my desktop computer.
However the problem shows when I am using my laptop (7 year old) usb.
So a good charger is recommended.

I can confirm this issue, but what i want to know is, why does this happen when the phone is lying flat on a surface while charging and goes away the moment you pick it up? If it was a faulty or imprecise charger issue then the problem should persist?
My guess is it has to do with the EM shielding around the charging module, and that it doesnt do enough to shield the totally normal residual interference from interfering with the touch screen digitizer. When we pick it up, our hand acts as an interference dampener and minimizes the issue while it is charging, to almost negligible amounts. But its just a guess. The chargers might also be generating greater than average interference as well. But just charger alone cannot explain why pickibg up minimizes the problem.

The charger doesn't cause any erratic behavior on my Galaxy Nexus like it does on this phone... So what is the explanation behind that?
Sent from my SGH-T989 using xda premium

manekineko said:
This is a known issue with all variants of the Galaxy S2.
The Galaxy S2 is very sensitive to input voltage, and if it doesn't like what it's getting, the touch screen calibration gets a little funky.
Voltage-regulated chargers (ones that are big and blocky or have a bulb on the wire) tend to work well.
Don't bother exchanging it over this, it won't change anything. You just need a better charger.
Click to expand...
Click to collapse
Use the charger that came with the phone
Sent from my Hercules using XDA App

What's unfortunate is that the Samsung charger that came with the device causes the touchscreen issues.
Fortunately, I have an HTC charger lying around that works, no problems.

I have seen this happen with the HD2, Evo 4g, galaxy s4g & Sensation. Its a problem with chargers and the voltage. It happens with those chargers from walmart. Its not just the GS2 phones.
Sent from my SGH-T989 using XDA App

Add the Tmo HD7 to the list.... it happens all touchphones on which i believe has grounds surrounding the phone, touching the touch screen stabilizer or whatever you'd like to call it. It's the ground of the charger, nothing to do with charger instability. Take your laptop's charger, plug it into a wall with no 3rd ground (a laptop that has the 3rd prong) and take that same plug, and plug it into a plug with 3 prongs, you'll notice it has that static-like feeling that makes ur fingers tingle (when you touch a metal part of your laptop). It's the same issue with our phones
I hope this helps someone

Just change charger i have noticed that since i work in a cellphone company .... but i change to a different charger and it stopped doing that....

I used another charger but the problem still exist

[INFO/REFERENCE] USB Port Problems - Car Mode/Vlingo/Ghost Charging

This post is to describe the issues I've had with the USB Port in my E4GT. You may want to keep this thread handy in case it might help in the future.
This is software agnostic, so the kernel/ROM is not relevant.
So -- anywho -- yesterday I was out of town purchasing a new vehicle and noticed that my phone was getting really poor battery life. I generally can make it through a day with light usage, but I was getting serious, serious drain. I also had my first LOSs -- three of them within a hour. Since the beginning of October, I have only had one LOS, and that was a "ghost LOS". I think the LOS was obviously a major issue in the battery drain, but what I describe below could have had a serious effect as well.
I took the phone off overnight charge at 8:30 AM. After some discussions with the salesperson, he needed to do some stuff. I was waiting and reading a forum with xScope Pro (they didn't have Tapatalk). All of a sudden, Vlingo popped up and asked me to accept the license agreement. I cancelled out of that and the phone told me I was in car mode. I told it to deactivate car mode, and everything was okay. When I was using my EVO 4G, the forums were full of messages about car mode activating, but I never had that problem. I figured it was par for the course that one of my Androids would have this issue. By 4:30 PM, I had the car mode issue come up a few more times, but my car charger and my home charger worked fine.
This morning, my phone would not connect to the computer. I also had a strange "green screen" where everything was in a green hue on my phone. It apparently self-corrected about 10 seconds after it occurred. It would turn on the charging light, but not connect to the computer. My USB jig also did not function. It wouldn't turn the phone on. I started freaking out and was trying to prepare it to go back for a repair/replacement, but Odin wouldn't find it. I blew into the USB port to try to clear out any possible particles... That didn't help. I eventually jiggled/wiggled/cast magic and got it to Odin. Thinking it could be an issue with the kernel/ROM, I hoped that Odin back to stock would fix the problem. I did a ##RTN# reset and plugged it in. Absolutely nothing. No charging light, no beep from the phone or computer.
I started searching and found some XDA threads about the Int'l SGSII and apparently it is a known problem with these phones -- some people even replacing the USB ports themselves. I didn't look to see if the particular part was available for our phones, but I was able to solve the problem by the following:
Parts Required:
1. Dentek Floss Pick (or whatever is non-metallic and small)
2. Contact Cleaner (I didn't use this, but some people said it helped them)
My technique was to carefully use the toothpick to poke around in the USB port and flush out any particles that were in there. I didn't see anything come out. The interesting part of this was a suggestion to "bend the PCB down a bit". That's the part that sticks out of the USB port for your cable to seat on. I moved it down slightly (it doesn't seem to be terribly hard to move). Once I plugged the phone back in, everything worked again. My USB jig works, the regular charger works, the computer recognizes it. I plugged/unplugged it in many times after the "fix" and it seems to work!!
If you try this yourself, be careful not to damage the PCB in the USB port. I'm not responsible for anything that happens.
tl;dr version:
? USB port acting weird? Can't connect? Getting random car mode?
! Clean it out with contact cleaner/skinny toothpick
! Possibly bend the PCB down a smidge

Yeah you see this a lot on android phones and the normal cause is LD or in other words corrosion in the usb port
Sent from my SPH-D710 using XDA App

I just started having this issue last night after having it replaced once already for a "random menu key". Has this issue resurfaced for you at all since this "fix"?

I had the same problem, however, I read somewhere else to nudge the usb port up instead of down. I nudged it up (towards screen) just a bit, and it seems to work fine, now (fingers crossed). YMMV, maybe some are off kilter towards the top and others toward the bottom.

same problem
I have a epic 4g touch that was poorly rooted and needs to be restored but unfortunately odin will not recognize it WHAT SO EVER.
it charges but wont register in windows 7 64bit (desktop) or 32bit (laptop)
I've been using the same micro usb cable.
This mught be the solution, if it works i'll report back

Why does it have to be non-metallic?
Can't I use a pin or something?

Thanks for starting this thread. I just started getting the car mode problem where it will flicker and prompt me to exit car mode.
I'm guessing this trick will work.
Sent from my SPH-D710 using XDA

The metallic may short circuit your phone if you touch the pins together.
eljean said:
Why does it have to be non-metallic?
Can't I use a pin or something?
Click to expand...
Click to collapse
Sent from my SPH-D710 using Tapatalk 2

Hope it works for you!
mjs2011 said:
Thanks for starting this thread. I just started getting the car mode problem where it will flicker and prompt me to exit car mode.
I'm guessing this trick will work.
Sent from my SPH-D710 using XDA
Click to expand...
Click to collapse
Sent from my SPH-D710 using Tapatalk 2

Seems good now. Not sure if this is safe or not, but I plugged my charger in, and then slightly tilted it down bending away from the screen. Since doing so, I haven't had any issues of car mode googling on/off on its own. It's been two hours since I did the trick where beforehand, the issue would occur every 10 minutes or less.
Sent from my SPH-D710 using XDA

toussant said:
I have a epic 4g touch that was poorly rooted and needs to be restored but unfortunately odin will not recognize it WHAT SO EVER.
it charges but wont register in windows 7 64bit (desktop) or 32bit (laptop)
I've been using the same micro usb cable.
This mught be the solution, if it works i'll report back
Click to expand...
Click to collapse
I'm sorry, I'm not trying to be a troll, but can you please elaborate on how a phone can be "poorly rooted"???
Sent from my SPH-D710 using xda app-developers app

The flash went bad and it got bricked. thats what I meant
:0)
Sent from my SPH-D710 using xda app-developers app

Ha! That actually worked. My phone started having the "forever on" red LED, and behaving as if it was always charging (screen wouldn't turn off after 5 seconds when locked like it normally does when unplugged). Bent the little pcb tab down with the end of a plastic toothpick and the light turned off. Hopefully it'll stay, but I'm guessing if it starts up again I'll just have to bend it a little more. THANKS.

Brent,
Glad you got it working! I have had to do this once more since I posted initially -- it really does seem to work.
Brent212 said:
Ha! That actually worked. My phone started having the "forever on" red LED, and behaving as if it was always charging (screen wouldn't turn off after 5 seconds when locked like it normally does when unplugged). Bent the little pcb tab down with the end of a plastic toothpick and the light turned off. Hopefully it'll stay, but I'm guessing if it starts up again I'll just have to bend it a little more. THANKS.
Click to expand...
Click to collapse

Been flashing a few roms and everything was going ok until,,,
Tonight Neither my laptop nor my desktop would recognize my phone! Tried different cables, ports, cuss words,,, nothing was working.
A small amount of pressure downward on the usb tab and, BINGO! Back on the road to flashing.
Thanks OP And XDA for being here. :laugh:

I started experiencing this car mode bug recently, and after doing a factory reset, reformatting all partitions and flashing 3 different ROMs with no luck resolving it, I was sure it wasn't related to software and was getting used to the idea that all the bumps, drops and abuse I had put my e4gt through had finally caught up with me. luckily found this thread and gave it a try. 6 hrs later and everything seems ok. thank you!
Sent from my SPH-D710 using Xparent Blue Tapatalk 2

Worked like a charm for me.
Hey thanks for this post man!! I am using SGS 4g, I was struggling with car mode issue since past few days. I was literally scavenging google and XDA until I came across this very valuable post of yours.
I didn't use the materials you suggested instead I used my old useless waste toothbrush to clean up the dirt and blew air in the USB port through my mouth forcefully. And ofcourse I had to bend the PCB a bit.
In the beginning the USB storage wasn't being detected on my laptop, then I bent the USB PCB a bit up and down very gently, this didn't work , so I decided to uninstall the USB storage device drivers from the device manager of windows 7. And there it was, done!! Hehehehe and boy oh boy was I thinking my phone was due for a repair or a check up.
It is a bit risky but as they say finders keepers, losers weepers....
Once again very useful post, thanks for the initiative :good:

Awesome. Glad it worked for you!
Faisal Merchant said:
Hey thanks for this post man!! I am using SGS 4g, I was struggling with car mode issue since past few days. I was literally scavenging google and XDA until I came across this very valuable post of yours.
I didn't use the materials you suggested instead I used my old useless waste toothbrush to clean up the dirt and blew air in the USB port through my mouth forcefully. And ofcourse I had to bend the PCB a bit.
In the beginning the USB storage wasn't being detected on my laptop, then I bent the USB PCB a bit up and down very gently, this didn't work , so I decided to uninstall the USB storage device drivers from the device manager of windows 7. And there it was, done!! Hehehehe and boy oh boy was I thinking my phone was due for a repair or a check up.
It is a bit risky but as they say finders keepers, losers weepers....
Once again very useful post, thanks for the initiative :good:
Click to expand...
Click to collapse
Sent from my SPH-L720 using Tapatalk 2

I have gotten so many replacements for this problem it's insane. I just got another one tonight. I have 4 batteries and an external battery charger now just to deal with the not being able to charge issue so my phone doesn't die while I'm at work. I'll have to try this next time it happens because I'm sure it'll do it again.

[Q] Extremely weird screen behaviour.

Hello all! Ive just recently got my Xperia arc, and flashed a nightly build of CM7 on it, number 20. Everything seemed to run smoothly, but just now screen started to behave very weird, it almost seem to have osme kind of "ghostly" second touch.
The upper part of the screen is almost impossible to use, when I try select an app to move it on the screen, by holding finger down, it just flickers for a second and gets deselected. If I manage to select it and drag+hold, it starts spazing out all over the screen, with screens switching between eachother by it self.
The problem is especially noticeable in games, where you usually have a joystick controller in bottom left corner. When using it, I usually trigger the buttons above it in the upper left corner which I am no where near at with my finger.
Is this a ROM issue, or hardware issue? Ive been using the rom for couple of days with no strange to it, and now this happens. Any ideas what the source can be?

ROM failure.

Sorry for bump, but apparently the problem remained. I changed to XDA rom, which too is based on CM7 thou and after a day I stumbled upon same problem of ghotsly second touch on screen.
I cant hold to move apps, cant precisely press a button in game on left side of screen, it then triggers some other button nearby. I do get haptic feedback from long press on a homescreen, but the "add new" menu popups only every few tries Any ideas of what may be causing this? I would really like to avoid the hassle of resetting the phone and sending it back for repairs :/

try stock one or miui.

It sounds a bit like your screen had a bad encounter with water...
Could this be the case?
iR¡[email protected]!* via Tapatalk

iridaki said:
It sounds a bit like your screen had a bad encounter with water...
Could this be the case?
iR¡[email protected]!* via Tapatalk
Click to expand...
Click to collapse
No, this phone is only few days old.
I think I am noticing a pattern.. screen behaves this way only late evenings, till next morning. I never noticed the issue during the day, but then it was there again for no reason after I left phone for couple of hours (it's past midnight here at the moment). Now when I think back, same was previous two evening, issue only noticeable during late evenings. Could my phone be possessed lol?
It's quite weird issue too. Upper half of the screen seems to have a ghost touch as I said. When trying to add a widget to upper screen, I only get a haptic feedback from long press. When playing games, all buttons on left side (landscape mode) get activated as soon I press one of them. Most weird of all, is that screens works perfectly in app drawer and settings, but not in app/homescreen. I will test how it is again tomorrow and report. If it works just fine again as if nothing happened I will be really puzzled.
Currently on CM7 Xda version, same was for official version. I am considering updating to MIUI, just gotta figure this radio difference stuff, but am becoming sceptic to whether this issue really lies with ROM and not app/settings.

Yep, issue is gone like nothing happened at the morning, this is is haunted ._.

I've figured the cause, it only happens when the phone is plugged in and charging. Beats me why thou, what remains to see now is if it is tied to the kernel or not. Posting it here in case others with similar problem stumble upon the thread.

Are you using the stock charger, i used to face bit similar problem when i used to connect my old HTC USB charger... later i discover the HTC charger was giving only 500mA , where as sony one is rated at 700mA.

mangemayur said:
Are you using the stock charger, i used to face bit similar problem when i used to connect my old HTC USB charger... later i discover the HTC charger was giving only 500mA , where as sony one is rated at 700mA.
Click to expand...
Click to collapse
Thanks for the tip! Turns out it didn't like my 1000mA charger I am using for all my usb stuff, but the stock on works perfect (it's 850mA).

Screen sensitivity greatly lowered when on charge?

Hey guys, has anyone else had this strange problem that when on charge, the screen definitely becomes less responive, harder to type on, and the main screen becomes laggy and must be swiped edge to edge on the screen to scroll apps. This can't just be me D:
Running latest 1.29.401.11 unrooted and on stock Rom.
Sent from my HTC One X using XDA App

theslugman said:
Hey guys, has anyone else had this strange problem that when on charge, the screen definitely becomes less responive, harder to type on, and the main screen becomes laggy and must be swiped edge to edge on the screen to scroll apps. This can't just be me D:
Running latest 1.29.401.11 unrooted and on stock Rom.
Sent from my HTC One X using XDA App
Click to expand...
Click to collapse
Try a different charger.

I am using the official HTC charger, and same thing happens when I used other people's different chargers, but only started happening with the latest update
Sent from my HTC One X using XDA App

theslugman said:
Hey guys, has anyone else had this strange problem that when on charge, the screen definitely becomes less responive, harder to type on, and the main screen becomes laggy and must be swiped edge to edge on the screen to scroll apps. This can't just be me D:
Running latest 1.29.401.11 unrooted and on stock Rom.
Sent from my HTC One X using XDA App
Click to expand...
Click to collapse
Its your charger, turn on show touches in developer options and see where it is registering your finger when on charge, then try again when charging from your computer.

Me too experienced this. Are you on stock or custom rom?
I am on custom rom! Now in charmeleon i dont have any issue.

I'm experiencing this on my HOX as well. The unlock ring becomes nigh on impossible to drag to the center to unlock & get to the home screen. Completely stock & on 1.29.401.11

I also have this problem too, using stock unbranded phone on latest software. When plugged in with official charger its very difficult to unlock and slows screen response considerably.
Sent from my HTC One X using XDA

this has been mentioned before, i get this issue sometimes, some people say its charger, but it can't be, seeing as both my chargers do this, and my desire hd doesn't do that on either charger, so by process of elimination it must be the phone at fault, seeing as it only happens when on charge, and not always on charge, i suspect a software bug somewhere
report it to htc though, then we might get a fix sometime.. i already have btw

Does it do the same when charging via your USB port on your pc?
Sent from my HTC One X using Tapatalk 2

lawrence750 said:
this has been mentioned before, i get this issue sometimes, some people say its charger, but it can't be, seeing as both my chargers do this, and my desire hd doesn't do that on either charger, so by process of elimination it must be the phone at fault, seeing as it only happens when on charge, and not always on charge, i suspect a software bug somewhere
report it to htc though, then we might get a fix sometime.. i already have btw
Click to expand...
Click to collapse
I wouldn't necessarily say that. My friend has a charger that messes up my Infuse's touch screen, but it has no issue on his phone. Certain phones can act weird with certain chargers. I've never really understood exactly what the issue is, but the HOX seems to be pretty picky. What worries me is the fact that it seems like there are a number of people with issues with the stock charger. It makes me wonder if the issue is a build issue with the phone, perhaps in the connector, that's making it picky or causing the problem all together. We should probably start gathering information about phones that have trouble with certain chargers and what version of the phone they are and see if there is a common trend.

Me 2,updated to 1.29.can't pull up to top,when I want remove the shortcut app from main page.
Sent from my HTC One X using XDA

Sometimes after i do manage to unlock the screen while on charge, the phone will immediately open the 'Phone' app. I thought it may just be because I dragged the ring too close to the 'phone' quick launch icon but definitely not the case.
Has anyone else experienced anything like this?

Yes I have noticed this to!
Sent from my HTC One X using xda premium

I had this too from day one and thought I had a faulty handset. I noticed somebody mention the charger and at the time I was using my (not too old) Sensation XE charger. I switched to the charger supplied with my HOX and haven't had the problem since. Still seems strange why this occurred because using the cable from the Sensation to connect to my PC it was never unresponsive, only when it was plugged into the wall socket.
Sent from my HTC One X using xda premium

liberator72 said:
I had this too from day one and thought I had a faulty handset. I noticed somebody mention the charger and at the time I was using my (not too old) Sensation XE charger. I switched to the charger supplied with my HOX and haven't had the problem since. Still seems strange why this occurred because using the cable from the Sensation to connect to my PC it was never unresponsive, only when it was plugged into the wall socket.
Sent from my HTC One X using xda premium
Click to expand...
Click to collapse
The reason you don't see the problem when connected to your pc is because most computers have good quality,regulated supplies to provide the 5V on their USB ports. The reason some wall chargers, even the official One X type in cases, are affected is because they are switch mode power supplies which convert 110/230V AC to 5V DC using high frequency pulses, if those aren't filtered properly they interfere with the touch screen. That's why I suggested testing by charging over USB earlier.
Sent from my HTC One X using Tapatalk 2

Yes, I've noticed it too.
But I have in my past phones too, don't all phones do this?
Sent from my HTC One X using Tapatalk 2

After nearly 2 and a half years with my desire (bravo) I have never had any sort of screen problems, it's weird!
Sent from my HTC One X using XDA App

Super Saiyan said:
Sometimes after i do manage to unlock the screen while on charge, the phone will immediately open the 'Phone' app. I thought it may just be because I dragged the ring too close to the 'phone' quick launch icon but definitely not the case.
Has anyone else experienced anything like this?
Click to expand...
Click to collapse
Same thing happen to me.... any solution for that?

ha, looks like I am not the only one with this issue... it happened to both the HTC original charger and another 2 units of usb+3pin charger as well...
Anyone got solution?

shuflie said:
The reason you don't see the problem when connected to your pc is because most computers have good quality,regulated supplies to provide the 5V on their USB ports. The reason some wall chargers, even the official One X type in cases, are affected is because they are switch mode power supplies which convert 110/230V AC to 5V DC using high frequency pulses, if those aren't filtered properly they interfere with the touch screen. That's why I suggested testing by charging over USB earlier.
Sent from my HTC One X using Tapatalk 2
Click to expand...
Click to collapse
brilliant point, it so happens that im currently living in an old house, with a crappy power supply, even my speakers were affected before. i don't have this problem whilst charging the phone at work (albeit with a different charger)
I think ill try plugging into different power ports around the house etc and experiment a bit... never thought it could be the house, although again the dhd isn't affected, so something must still be missing/not right on the one x for it to display this symptom.