Develop Bugs

[Q] Touch got crazy during USB connection Arc S

as it`s said in the title, my touchscreen in Xperia Arc S is getting crazy during USB connecting. sometimes it just doesn`t work, sometimes behaves like I`ve putted two fingers on it, but I`m holding only one finger, sometimes just some area on screen works and some not. is there any way to fix that? i`ve got bootloader locked, so i can`t get root. I found this problem in every bulid I`ve tried.

I think this is a charger or Voltage or usb-cable's problem. you can change a usb-cable to try it again.

slayer_boxer said:
I think this is a charger or Voltage or usb-cable's problem. you can change a usb-cable to try it again.
Click to expand...
Click to collapse
but if I`m putting my USB cable to a wall socket`s charget it`s ok, only during PC-USB charging this problem is appearing
and BTW I`ve not got any spare cable to try it. will try it tomorrow with my mom`s, dad`s and sister`s cables and let know is that ok or not
edit: I`ve tried with another USB cable and still got this problem. normal charging is ok but PC-USB charging causing problem.

HI, I have the same problem on arc S. Is there any solution yet?

gallardo5 said:
but if I`m putting my USB cable to a wall socket`s charget it`s ok, only during PC-USB charging this problem is appearing
and BTW I`ve not got any spare cable to try it. will try it tomorrow with my mom`s, dad`s and sister`s cables and let know is that ok or not
edit: I`ve tried with another USB cable and still got this problem. normal charging is ok but PC-USB charging causing problem.
Click to expand...
Click to collapse
Mine's on reverse. No problem when PC-USB charging, touch screen gets crazy the other way. I have this problem since I bought the phone.

SEK610i said:
HI, I have the same problem on arc S. Is there any solution yet?
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Click to collapse
Yes, charge it via wall charger
Sent from my LT15i using XDA Premium App

Flo95 said:
Yes, charge it via wall charger
Sent from my LT15i using XDA Premium App
Click to expand...
Click to collapse
Beside that ?

zangetsu2188 said:
Mine's on reverse. No problem when PC-USB charging, touch screen gets crazy the other way. I have this problem since I bought the phone.
Click to expand...
Click to collapse
This, on wall charger it randomly registers a second touch.

gallardo5 said:
as it`s said in the title, my touchscreen in Xperia Arc S is getting crazy during USB connecting. sometimes it just doesn`t work, sometimes behaves like I`ve putted two fingers on it, but I`m holding only one finger, sometimes just some area on screen works and some not. is there any way to fix that? i`ve got bootloader locked, so i can`t get root. I found this problem in every bulid I`ve tried.
Click to expand...
Click to collapse
If this problem happening only when phone is connected to pc and sd card mounted then I guess its app2sd bug something.
If only in charge mode then you cable is maybe "old"
Sent from my MT15i using Tapatalk

I'm guessing it's internal current leak. There's nothing you can do about it, other than getting another phone.

Its probably because your laptop/computer has an "unearthed plug" (a plug with only two pins) whereas,your phone charger has earthed plug (3 pin plug).
The 3rd pin is to push out the excess current/voltage from your device to the ground and that is the reason you dont experience multiple-touches when you connect your charger directly to sockets. Simple as that.

Or because of capacitive touch screen nature reaction on different voltage ?

0-87809
ya it happens only through the power supply and voltages problem..
it happens many times often...
i noticed that problem in indian trains..that when i did charging in train.it happens
and sometimes the battery also gets severly damaged through it..
so BEWARE..!!

I found the best solution ever....... just sold my Xperia and bought HTC Sensation
but for other people, I just had pre-beta version of Windows 8, which has a looooooooooooooooooooooooot of bugs, I reinstalled Windows 7 and all problems gone. And ether USB devices was getting crazy as well, so that must be something with USB port, not phone.

Howdy guys,
I found that there was a small amount of "noise" on the 5v line comming from my charger. and that was causing the touchscreen to fritz.
i tested using my osciliscope.
you'll prob find that the 5v line from you laptop is dirty. and the arcs internals cant filter it out. i dont know if prolonged use can cause dammage tho but i would advise against it.
so charge it from a stable source.
Pvy.

The same problem happens only when I connect my phone via HDMI to a TV! And it's annoying!

i have the same Problem too if i charge my LT15i with the Charger from a HTC Wildfire. At First i thought it has something to do with CM7 but now , on Arconium its still the same.
Fortunately my phone charges normal on the USB Port of my PC in the Company

I would say that if you get this problem using the original charger in any wall socket, try another charger if possible otherwise have both your phone and charger examined at a repair center.
If you get this problem charging via USB from a laptop or connecting via HDMI to a TV, check if the same problem appears during charging through a wall socket.
Basically you will have to check if the grounding problem is located in the charger, phone or other devices like a laptop or TV.

Johan-SEAnswers said:
I would say that if you get this problem using the original charger in any wall socket, try another charger if possible otherwise have both your phone and charger examined at a repair center.
If you get this problem charging via USB from a laptop or connecting via HDMI to a TV, check if the same problem appears during charging through a wall socket.
Basically you will have to check if the grounding problem is located in the charger, phone or other devices like a laptop or TV.
Click to expand...
Click to collapse
Hi, do you work at SE?
And I tried now and I also have this problem when conected to TV. So my problem is connecting to TV and to PC, but not when charging over wall socket.

SEK610i said:
Hi, do you work at SE?
And I tried now and I also have this problem when conected to TV. So my problem is connecting to TV and to PC, but not when charging over wall socket.
Click to expand...
Click to collapse
Yes I work at SE.
In that case it seems that something changes the ground in your TV and PC.
Do you have any problems when the phone is not connected to anything?
Because if it works properly when connected to the charger via wall socket I don't think it's a problem with the phone or charger.
You could try to disconnect some other equipment from the TV when you connect your phone to see if this might be caused by some other equipment like antenna cable, sattelite dish, DVD or Blueray players etc.

Xperia S /w unlocked bootloader bricked - USB not working

Hi XDA
I am using a Sony Xperia S with an unlocked bootloader and root. It is, as the title says, completely bricked and furthermore it isn't responding to my USB cables whether it be to my wall charger or to my computer(s).
I have tried doing a hard reset - both complete and just reboot. But It doesn't vibrate at all, and nothing happens.
I have tried connecting it in flashmode (holding volume button down and connecting to USB), still it doesn't react or show up on my pc.
I have tried using different USB cables (3 of the kind)
I have tried using different USB ports and computers.
I have tried using a different wall charger (still for the same phone though).
All of those things without it responding in any way. It was fully charged and in my pocket and when I was about to check it, it was completely dead. And I haven't been able to do anything. The only thing odd, was the heat just beneath the camera (Guessing that is where the CPU is located.)
If any of you brilliant minds have any kind of advices. I'd be more than happy to try them out!!!!
-doblez

doblez said:
Hi XDA
I am using a Sony Xperia S with an unlocked bootloader and root. It is, as the title says, completely bricked and furthermore it isn't responding to my USB cables whether it be to my wall charger or to my computer(s).
I have tried doing a hard reset - both complete and just reboot. But It doesn't vibrate at all, and nothing happens.
I have tried connecting it in flashmode (holding volume button down and connecting to USB), still it doesn't react or show up on my pc.
I have tried using different USB cables (3 of the kind)
I have tried using different USB ports and computers.
I have tried using a different wall charger (still for the same phone though).
All of those things without it responding in any way. It was fully charged and in my pocket and when I was about to check it, it was completely dead. And I haven't been able to do anything. The only thing odd, was the heat just beneath the camera (Guessing that is where the CPU is located.)
If any of you brilliant minds have any kind of advices. I'd be more than happy to try them out!!!!
-doblez
Click to expand...
Click to collapse
Try the rubber band method from here.

Mirhawk said:
Try the rubber band method from here.
Click to expand...
Click to collapse
I am not sure what happened... But after being in the charger for 24+ hours and then getting plugged into the computer with flashtool ready (rubber band method). It suddenly turned on as it should, and when shut off it shows the usual charging screen!
Thanks for your help though!

TYPE C PORT broken?

Hi everyone,
Two weeks ago I charged my nexus 5x in my car via an 12v car adapter, the cable was USB-A to USB C, after about 5 minutes my phone reboot automatically then stucked at "Google" logo and fail to boot into marshmellow animation. Then I tried rebooting by pressing down the power button for about 20 second, but nothing changed (Still stuck at google). Then I pressed power button and volumn key down to enter the bootload mode, and choose power off. After that I could not start my phone or get it charged (with the original cable and adapter). My phone is never unlocked or rooted.
I finally resolved the issue by opening the back cover and unplug the battery, After the battery was pluged in again it finally come back to live.
Everything works OK until recently I want to copy some videos from my PC to nexus 5x, but nothing happen when I connect the phone to my PC (It works before), I could tell the driver is correct and the USB port work well as my Nexus 7 could be recognized just like normal. the USB configuration is MTP in developer options, but there just nothing change in device manager when the nexus 5x is connected. I've tried different PCs and other cables, the situation is the same.
Now I am suspecting the type C port is no longer able to transfer data but charging. I am planing to visit the nearest apple store and try if the original type C cable could work (I don't have any other PCs with typec port available).
Will update....

You took your phone apart? Wtf. Pretty sure you voided your warranty with that..

hopesrequiem said:
You took your phone apart? Wtf. Pretty sure you voided your warranty with that..
Click to expand...
Click to collapse
Actually I did not expect any warranty as I am using the phone in China, but nexus is never officially sold here.

I had my 5x turn off on me in the middle of the night while charging and refuse to turn on the next morning.
I had it unlocked, rooted running pure nexus ROM and had the surround sound and EIS mod though.
I tried other cables that I knew worked in the past too.
Maybe I had the same problem?
The phone was completely "dead" there was no red led indicator when holding the power button.
But software could be an issue I guess. I was running all of those mods for about 2 weeks however. No major drops or water damage.
Sent from my Nexus 5X using Tapatalk

AnfarnoCorina said:
I had my 5x turn off on me in the middle of the night while charging and refuse to turn on the next morning.
I had it unlocked, rooted running pure nexus ROM and had the surround sound and EIS mod though.
I tried other cables that I knew worked in the past too.
Maybe I had the same problem?
The phone was completely "dead" there was no red led indicator when holding the power button.
But software could be an issue I guess. I was running all of those mods for about 2 weeks however. No major drops or water damage.
Sent from my Nexus 5X using Tapatalk
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Click to collapse
Sounds quite similar!
So how is your phone now? Are you able to connect to PC as MTP?
Maybe I should try a factory reset first? But if the reset does not solve the problem it will be painful to transfer the data back from PC.

OP, does the cable you were using in the car have the proper 56k resistor? It might have partially killed your charging port if it doesn't and there happened to be a current spike.

yangus.ma said:
Sounds quite similar!
So how is your phone now? Are you able to connect to PC as MTP?
Maybe I should try a factory reset first? But if the reset does not solve the problem it will be painful to transfer the data back from PC.
Click to expand...
Click to collapse
I never got the phone to work, I got Google to RMA the phone, just sent back the old one, I'm hoping they cover it under warranty. I was using the charger that came with the phone too.
Sent from my Nexus 5X using Tapatalk

yangus.ma said:
Hi everyone,
Two weeks ago I charged my nexus 5x in my car via an 12v car adapter, the cable was USB-A to USB C, after about 5 minutes my phone reboot automatically then stucked at "Google" logo and fail to boot into marshmellow animation. Then I tried rebooting by pressing down the power button for about 20 second, but nothing changed (Still stuck at google). Then I pressed power button and volumn key down to enter the bootload mode, and choose power off. After that I could not start my phone or get it charged (with the original cable and adapter). My phone is never unlocked or rooted.
I finally resolved the issue by opening the back cover and unplug the battery, After the battery was pluged in again it finally come back to live.
Everything works OK until recently I want to copy some videos from my PC to nexus 5x, but nothing happen when I connect the phone to my PC (It works before), I could tell the driver is correct and the USB port work well as my Nexus 7 could be recognized just like normal. the USB configuration is MTP in developer options, but there just nothing change in device manager when the nexus 5x is connected. I've tried different PCs and other cables, the situation is the same.
Now I am suspecting the type C port is no longer able to transfer data but charging. I am planing to visit the nearest apple store and try if the original type C cable could work (I don't have any other PCs with typec port available).
Will update....
Click to expand...
Click to collapse
I'm wondering if you meant 12 W, not Volt. Either way, I think I"m in the same boat. Been using an approved USBC-A cable with a 12w charger in the car, and now I've noticed that the USB debugging options will randomly show up in the notification shade when the phone is NOT plugged in. The only way to dismiss the notification is to plug the phone in. Additionally, the OEM charger no longer says "charging rapidly". I'm thinking the USB C port has taken a hit.
Any thoughts?

USB not working at all

Hi,
the G4 is truly the worst phone I ever had.
The power button doesn't work correctly and sometimes does a double click and sometimes doesn't work at all.
Then I had the bootloop and rescued it by flashing a new firmware.
After that the USB worked fine.
Now when I connect USB it charges very slowly but doesn't do the usual connecting sound. Also the pc doesn't recognize anything.
I opened the phone and the USB connector looks good and I also measured the connection to the test points. So it might be a software issue.
Anyone with the same problem or an idea what I can do?
Thank you!

2Wires said:
Hi,
the G4 is truly the worst phone I ever had.
The power button doesn't work correctly and sometimes does a double click and sometimes doesn't work at all.
Then I had the bootloop and rescued it by flashing a new firmware.
After that the USB worked fine.
Now when I connect USB it charges very slowly but doesn't do the usual connecting sound. Also the pc doesn't recognize anything.
I opened the phone and the USB connector looks good and I also measured the connection to the test points. So it might be a software issue.
Anyone with the same problem or an idea what I can do?
Thank you!
Click to expand...
Click to collapse
Have you tried a different charger? I've had some issues with the LG charger that came with the phone and I've had better success with my old Samsung charger.

I did. And when USB was still working the Samsung charger also worked much better. But now all are the same and barely charge.

Sounds like a defective phone.. all sorts of problems. Bummer.

no USB recognition

Hi.
After searching and testing for hours I don't know how to proceed...
I can't access my phone via USB anymore. The phone isn't detected, no change in device manager on Win7. Only Win8.1 says it found an unknown device.
Quick Charge also does not work like before, but normal charging works stable on every cable.
On the phone, no connection info pops up. I had to set MTP in the developer settings. But it does the charging vibration.
Some testing before, the device was detected in about 1 of 10 tryings, but only with the original cable.
But now, this also doesn't happen anymore.
It worked for about 4 times in a row, after I flashed a 20g flashable kdz over the 20d, but stopped working then.
Could the method that activates MTP functionality be corrupted? (in download mode it also doesn't work)
This all happens between updating to mm and now.
The phone is unlocked and rooted. I use an extended battery and a SD card. A reset didn't help.
The pins of the port look ok. None of the solutions I found did help.
Could the controller or parts of the port be destroyed?
Could my Aukey QC 3.0 car charger do some harm to the device? Maybe when being connected while starting the engine or something like this?
Is the warranty for hardware problems like this void when unlocking the bootloader?

Phantom272 said:
Hi.
After searching and testing for hours I don't know how to proceed...
I can't access my phone via USB anymore. The phone isn't detected, no change in device manager on Win7. Only Win8.1 says it found an unknown device.
Quick Charge also does not work like before, but normal charging works stable on every cable.
On the phone, no connection info pops up. I had to set MTP in the developer settings. But it does the charging vibration.
Some testing before, the device was detected in about 1 of 10 tryings, but only with the original cable.
But now, this also doesn't happen anymore.
It worked for about 4 times in a row, after I flashed a 20g flashable kdz over the 20d, but stopped working then.
Could the method that activates MTP functionality be corrupted? (in download mode it also doesn't work)
This all happens between updating to mm and now.
The phone is unlocked and rooted. I use an extended battery and a SD card. A reset didn't help.
The pins of the port look ok. None of the solutions I found did help.
Could the controller or parts of the port be destroyed?
Could my Aukey QC 3.0 car charger do some harm to the device? Maybe when being connected while starting the engine or something like this?
Is the warranty for hardware problems like this void when unlocking the bootloader?
Click to expand...
Click to collapse
Don't know if that will actually help but just give FWUL a try.
Link http://tinyurl.com/FWULatXDA
This is a live ISO where you don't need any drivers etc. If you have a physical defect it will not help but to exclude windows + driver issues it's worth a try
#
Sent from my LG-H815 using XDA Labs

I gave that a try but it didn't help.
I am totally confused, which type of (bad) usage could result in such a behavior...
It also do not detect my Flir One thermal cam anymore.
How can I figure out if it is based on soft- or hardware?

im having a very similar issue with my g4 , it charges very slowly and shows charging from a USB source instead of AC when plugged to a charger, quickcharge stopped working, and my pc wont recognize it.
i think the problem is a damaged usb port

unleashurfreak said:
im having a very similar issue with my g4 , it charges very slowly and shows charging from a USB source instead of AC when plugged to a charger, quickcharge stopped working, and my pc wont recognize it.
i think the problem is a damaged usb port
Click to expand...
Click to collapse
Today I was in a repair shop for mobiles and the guy heated up the internal pins of the usb port with a soldering iron to exclude a problem with the connection there, but it didn't help.
Next would be to electrically meassure the external pins against the internal pins, to be sure there is nothing broken. But I think, I will send it to LG to check the device for the concrete issue.
The guy at the service said, it could be that some of the flashs did destroy the function which calls up the data connection and that they can do a complete reflash without using the usb port.
But... he also said that the diagnosted issue could be out of my warrenty due to the unlocked bootloader.
If you want to exclude the usb port as a problem, it is quite easy to change the usb port for someone with a good soldering equipment. The port itself does only cost a pocket money and there are some detailed videos on youtube for this. good luck ^^

Phantom272 said:
Today I was in a repair shop for mobiles and the guy heated up the internal pins of the usb port with a soldering iron to exclude a problem with the connection there, but it didn't help.
Next would be to electrically meassure the external pins against the internal pins, to be sure there is nothing broken. But I think, I will send it to LG to check the device for the concrete issue.
The guy at the service said, it could be that some of the flashs did destroy the function which calls up the data connection and that they can do a complete reflash without using the usb port.
But... he also said that the diagnosted issue could be out of my warrenty due to the unlocked bootloader.
If you want to exclude the usb port as a problem, it is quite easy to change the usb port for someone with a good soldering equipment. The port itself does only cost a pocket money and there are some detailed videos on youtube for this. good luck ^^
Click to expand...
Click to collapse
Thanks i think i'll give this a try