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Nexus 7 2012 - USB & Developer Toggle Cause Restart

I have a serious issue with my Nexus 7 2012. I put CM11 on it and all was great. The power got down to 11% on me, so I plugged it into my computer. I noticed it wasn’t charging, MTP didn’t kick in, and I couldn't get into ADB. I figured I’d screwed up the USB port. I tried different cables all with the same results. I turned the tablet off and plugged it in and the battery started charging. I couldn’t get MTP or PTP to work nor could I get into ADB after it was charged. I did a factory reset, clearing everything, and reinstalled. Same issue.
I can use my OTG cable and TWRP to install software on the tablet. I tried AKOP ROM. It allows me to use my OTG cable but the tablet doesn’t charge. I try to toggle MTP to PTP or turn off USB debugging and the tablet locks and reboots. I try to turn off the developer options toggle and the tablet locks and restarts.
Help! I don’t know what to do with it. I've searched all day.

Check the basics. When you plug your N7 into your computer, are you using a USB 2.0 port? Is it directly mounted on the computer's motherboard (i.e., a rear port)? Are the proper drivers installed so your N7 is recognized as a Nexus 7?
USB specifications only provide .5A power, v. 2.0A power from the AC charger. Get your N7 fully charged,then get back with whether it locks and reboots.

exglynco said:
Check the basics. When you plug your N7 into your computer, are you using a USB 2.0 port? Is it directly mounted on the computer's motherboard (i.e., a rear port)? Are the proper drivers installed so your N7 is recognized as a Nexus 7?
USB specifications only provide .5A power, v. 2.0A power from the AC charger. Get your N7 fully charged,then get back with whether it locks and reboots.
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Click to collapse
Thanks for the reply. Yes. I've done all of that. Multiple computers, multiple cables, multiple chargers. The Nexus is at 100%.
Here's the exact issue I have now: http://forum.xda-developers.com/showthread.php?t=2536272

Well. I'm going to say disregard. My searches show that a craptastic 12 volt car charger probably hosed the N7's mother board. I'm going to try one more fix but I'm sure it's toast.

Nexus 4 charging but no usb connection

Hi there,
Just before starting, I searched all over the place a solution to my issue but none worked so far (changing USB cable, use WugFresh steps to reinstall drivers on Windows, activate MTP/PTP, USB debugging, etc....)
None the steps described in this thread work for me.
My Device :
- Nexus 4 (bootlader unlocked)
- At some point I used WugFresh root toolkit to root my phone, but then reverted to Stock
- Now it is using STOCK 5.1.1
Also :
- I always used Samsung micro USB cables (5V 1.0A instead of 5V 1.2A for the standard Nexus 4 charger) to connect/charge my phone and it always worked great. (2 at home and 1 at work)
- I have flashed several devices (P1000, I9100, Galaxy Nexus...) using those cables and never had issues...
My story :
- My Nexus 4 was shutting down randomly in the past weeks, sometimes it was a pain to start, but I always managed to restart it (holding power 30s, release, then hit power again)
- One day I found myself with the blinking red light of death (one time it was blinking red and green as well), and honestly I don't really know how I got myself out of it and phone is charging well now....
Where I am now :
- After all that, I figured, well, it's time to reflash the device completely, maybe with CM that time...
- But, since then, it has been impossible to connect my phone through USB both on Windows and Linux (Debian)
- I am also hit with that issues where randomly when my phone restarts it optimizes apps just like it does when restarting after a major update
(https://productforums.google.com/forum/#!topic/nexus/IJSOuc7gw0w)
- I booted in recovery, wiped everything (cache + data), but still have the same issue.
- On Windows, I get : "Unknow USB device" (even after reinstalling drivers using WugFresh instructions)
- On Linux, I get this :
Code:
[13068.787800] usb 1-6: new full-speed USB device number 35 using xhci_hcd
[13068.787971] usb 1-6: Device not responding to setup address.
[13068.992061] usb 1-6: Device not responding to setup address.
[13069.196232] usb 1-6: device not accepting address 35, error -71
[13069.196275] usb usb1-port6: unable to enumerate USB device
When I plug my Nexus 5 (hehe always have a spair device) it is recognizes straight away on Linux using lsusb. (same cable)
So at this point, I am thinking that this is a hardware issue. (maybe battery is draining to much power which causes USB connection to fail ?)
I teared down this morning my Nexus 4, removed battery and checked USB port (a bit darker on both top corners), reassembled the Nexus 4.
But still, the USB connection issue remains....
I was so pissed that I ordered both a new battery and a new USB flex before writing this, so that I'm hoping to find the culprit... provided it's hardware related....
The weirdest thing is that in the past my Samsung I9100 ended up the same way... (I changed the USB Flex but didn't work... after that I gave up)
Thanks for any input you could provide to me!
P.S. : I will never buy again a phone with no microSD card support... drives me crazy to be stuck like this.

Found the culprit!!!
Hi there,
Just wanted to confirm that the culprit was the USB flex !!!
I tried the new battery first, didn't work, then changed the USB flex, crossed my fingers... and right after boot got USB debugging/MTP working again !
So if you ran into that same issue, first check the cable, if you pretty sure it's not the cable, then it might be the USB flex...
Attaching a picture of my - bad - USB flex (the connector is a bit dark on the top, also noticed moisture inside...) for reference in case it can help...

Galaxy S5 Not Charging

Hello XDA forums, i'm having a charging problem with my galaxy s5. No matter what i do, it does not charge properly.
When plugged to a wall charger, all the phone does is to show a gray battery icon with a bolt on it on the screen, which turns off in a few seconds and repeats this every some seconds. I have tried diffrent cables, chargers, tried connecting to diffrent pcs with all the combinations possible, all chargers work on diffrent devices, just not on my phone. I have inspected the charging port close up, everything looks just fine. The battery also looks fine physically, not inflated or looking weird in any ways. I had the phone charging for the whole last night, and in the morning when i powered it up, it showed only %6 power and within seconds powered off.
I want to try to format it, to see if the problem might be caused by software issues but i also want to save up some of the data in it, like contacts and some files, i don't have backups and loosing them would be horrible. is there any way to boot up the device connected to pc and take my datas from it? What should i do? what would you recommend?
The phone is sm-g900f 32gb, it was running on android 5.0.1 ofw rooted. When the phone is plugged in to the computer in download mode, the pc recognises it and device manager shows "SAMSUNG Mobile USB CDC Composite Device" under USB controllers.
Thanks

Usb-pc and charging problem.

Hello, I am the owner of the Chinese version of the phone. I have trouble. After installing the unofficially firmware there was a problem.
The switched on phone does not see the connected charger, does not see the PC. (PC does not see my Phone too. No New devices)
If the phone is switched off and connected to the PC, then turn on my Phone, the PC and the phone see each other, until the cable is removed.
If the phone is switched off and connected to the charger, the phone is charging. If turn it on(connected to charge) Phone is charging, but only slow charge (no qc)
I tried different chargers and cables, including official.
I tried to install different firmware via Myflash and Axon7_EDL_Tool
for example:
A2017_B13_FULL_EDL_UNBRICK_DFU
A2017_B17_NOUGAT_FULL_EN
A2017_B11_OREO_FULL_OR
etc.
disassembled the phone, all contacts on the board are normal. externally all is ok.
what do you advise? how to return the phone to its normal state?
(google translate)
Add
If connect turned on Phone to pc an wait, sometimes pc see New device
unknown USB device (port reset failure)
There was a problem with starting the USB device \ VID_0000 & PID_0001 \ 5 & 376aba2d & 0 & 18.
Driver Name: usb.inf
GUID of the class: {36fc9e60-c465-11cf-8056-444553540000}
Service:
Bottom filters:
Upper filters:
Problem: 0x2B
Problem status: 0x0

Still waitin 4 cure

Heey, smbd help me

Reinstall the drivers? Try a different cable? Perhaps a fully clean flash?

Skv012a said:
Reinstall the drivers? Try a different cable? Perhaps a fully clean flash?
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Click to collapse
I tried all this. different chargers, cables and pc
a few hours ago I flashed the phone without the battery. problem still exists.

FaTAX6 said:
I tried all this. different chargers, cables and pc
a few hours ago I flashed the phone without the battery. problem still exists.
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Click to collapse
Very strange... it should not just stop working with usb port suddenly like that. You might have to try ordering a new USB board from Ali Express to actually make sure it's not the board. Some chip on it may have bricked that would be harder to ping.

mine does this too, only way to get it to charge is to power off, plug phone in, and then power back on. Tried clearing cashe/delvik and even wiped everything clean and did a fresh install of newest version of bootloader/twrp/rom

I am also experiencing this recently. about two weeks already not having quick charging and PC connection nor OTG function not working.
If I have time, I'm gonna open up this phone too.

PC doesn't recognize the phone

Hey all,
I've been having issues with battery drain for the past couple of months. I've tried flashing the stock ROM 3-4 times and I still have the same issue.
The strange things is, now when I connect my phone to a computer, it doesn't recognize it, it only charges. I do not even see the USB configuration pop up to choose mtp. When I try to change it from the developer options, I'm only able to select mtp or ptp but none of it makes any difference. The phone doesn't even get detected.

AkCullen said:
Hey all,
I've been having issues with battery drain for the past couple of months. I've tried flashing the stock ROM 3-4 times and I still have the same issue.
The strange things is, now when I connect my phone to a computer, it doesn't recognize it, it only charges. I do not even see the USB configuration pop up to choose mtp. When I try to change it from the developer options, I'm only able to select mtp or ptp but none of it makes any difference. The phone doesn't even get detected.
Click to expand...
Click to collapse
Problem is fixed. Issue may be due to faulty cable or usb port.

Try selecting "connected devices" in settings then make your choice.

I'm facing same issue since I installed the Gcam by using the non root method and now I'm stuck with Unlocked Bootloader and PC is not recognising my device and is just charging it. I have also tried installing drivers manually but it didn't helped. I'm on 8.1 now and the problem is since the May Update.

Nick2580 said:
I'm facing same issue since I installed the Gcam by using the non root method and now I'm stuck with Unlocked Bootloader and PC is not recognising my device and is just charging it. I have also tried installing drivers manually but it didn't helped. I'm on 8.1 now and the problem is since the May Update.
Click to expand...
Click to collapse
Can you try adjusting the USB cable in your phone? Like pull it out a Lil bit while it's still connected or tilt it upward or downwards. Helped me

AkCullen said:
Can you try adjusting the USB cable in your phone? Like pull it out a Lil bit while it's still connected or tilt it upward or downwards. Helped me
Click to expand...
Click to collapse
This is directly connected to your other posts on battery drain, if you are having to do this you have a damaged USB port and explains exactly why you experience that USB OTG wakelock, the damaged USB port is causing the phone to think an OTG device is connected and it keeps looking for it.

kudos1uk said:
This is directly connected to your other posts on battery drain, if you are having to do this you have a damaged USB port and explains exactly why you experience that USB OTG wakelock, the damaged USB port is causing the phone to think an OTG device is connected and it keeps looking for it.
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Click to collapse
Won't a damaged USB port mean my phone would have charging issues too?

AkCullen said:
Won't a damaged USB port mean my phone would have charging issues too?
Click to expand...
Click to collapse
Either way, what you are having to do is not normal, if it happens with more than one cable then it must be the port, take it to a service centre and get it fixed.
If it fixes the USB wakelock is another question but it's a bit of a coincidence you are getting a bad connection on the USB and also have a USB related wakelock.

kudos1uk said:
Either way, what you are having to do is not normal, if it happens with more than one cable then it must be the port, take it to a service centre and get it fixed.
If it fixes the USB wakelock is another question but it's a bit of a coincidence you are getting a bad connection on the USB and also have a USB related wakelock.
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Click to collapse
Okay I'll see if I can get it replaced.