I've had an unlocked/rooted Pixel since January. In March, I bought this external battery case from Amazon:
https://www.amazon.com/ALCLAP-Portable-External-Extended-Charging/dp/B072FPSWZW/
While I was running Nougat, it worked well and gave me a decent-enough power bank for when I needed it.
While the Pixel was still running Nougat, I could plug in the USB-C charger to the battery case and the phone would immediately indicate that it had started charging. When the built-in battery charged to 100%, the case would start to charge. This has been the standard behavior for any battery case I've had for any of my previous phones (Nexus 6, Samsung Galaxy).
A few weeks ago, I started running DP3 and have since updated to DP4. It appears that they've added functionality in Android to allow charging of external devices with the Pixel's USB-C port, and I think the combination of that and the battery case has started to cause problems.
Now, when the case is connected to the phone, I see a notification in the drawer from Android System: "USB supplying power to attached device. Tap for more options." Tapping reveals there is only one option, "Supply power. Charge the connected device. Works only with devices that support USB charging", plus a cancel button.
In order to use the battery case to actually charge the Pixel, I have to remove it from the case, press the power button on the case to start charging, then plug it back in for it to detect that power has been attached. It's the same if I plug the charger into the case with the phone already in it. I have to remove/press power/reinsert for the phone to detect that it's charging.
The problem is, if I do that and allow the case to charge the phone to 100%, or forget to remove/reinsert when I connect the USB-C charger (like when I go to sleep at night) and the case battery charges to 100% before the phone, the phone crashes and shuts down completely.
I tested for the past few days without the battery case and didn't have any crashes. Shortly after reattaching the case, my phone crashed in the middle of a phone call when it had charged to 100%.
I'm guessing this is by design to prevent short-circuits coming from devices attached to the phone's USB-C port...but couldn't this be avoided by having the option to turn off the Pixel's ability to supply power to attached devices?
Anybody else have similar problems or an idea of how to disable the supply power feature via root?
Related
Hi,
Recently I've got my wireless charging pad (a well-known $27 generic wireless charger off eBay). Put my phone on, and it charged flawlessly and quickly enough. As soon as it got 100%, the charging stopped, and the LED on the pad turned green. No problem here. But, if I remove the phone and put it back immediately, while it is still at full capacity, the charging starts over and continues infinitely, as if it is connected to a wall charger. This concerns me, since the battery is being kept on trickle charging forever (about 20mA in screen-off mode according to Battery Monitor Widget), and the phone gets slightly warm. Besides, the charger unnecessary drains power from outlet.
I suspect, there's something wrong with communication between power receiver (phone) and transmitter (charging pad), since according to Qi standard, the power receiver should send an End-of-Power message to transmitter, as soon as the battery gets full, which in fact happens initially. But once the phone is removed and put back on the pad with battery still full, it seems, the message is not transmitted anymore, and that causes the pad to continue feeding power infinitely.
Could you please check your Nexus 4 with the wireless chargers you posses? I need confirmation, that this is indeed the phone's fault, and not the charger itself.
Follow these steps to possibly reproduce the issue:
1. If the phone is fully charged, play with it a little to drop the charge for 1-2%.
2. Put the phone on the charging pad and wait until charging process stops (your charger should probably notify that by some beep or LED color).
3. Quickly remove and put back the phone on the pad.
4. Observe what happens.
5. Report here.
Thank you!
Nexus 7 2012. CM 11 M2 Grouper, - 3-5 hours use daily - Unit is 20 months old.
Until for the first time while playing a game, allowed the device to attempt recharge while continuing with the game after getting a 14% low Battery warning flash on screen.
Factory Charger and connection cable..(this is a 2100 mA strength charger)
The device went dead despite being connected to a charger.
the device went totally dead as the battery drained completely.
the problem appeared to be that the device stayed on and drained the battery.
Opened up the device and charged the battery with a home-made cable - good to go..(98%)
the process involved using 4 sewing needles inserted into the battery connection and crocodile clips to attach, this ensures that the battery is receiving equal current to each side.
this can be done with any type of standard charger but will take longer. the beauty of using the factory charger is that the recharge will only take 3 hours verses 10 hours for a 500 mA type charger. the chargers stop automatically when the battery is fully charged, this would lead one to deduce that any control circuitry related to battery charge levels is inside the charger.
reconnected battery and assembled the unit.
Followed google instructions and used boot menu to switch off device.
turned on device as normal.
Did a factory data reset and wiped all user information.
Set screen brightness to minimum & set battery % inside the charging icon.
Turned off the wi-fi and nfc and everything that could affect battery life.
the device is showing a charging icon when powered off but the battery is not increasing in charge
the device makes a nice noise when the charger is connected.
the device shows the charging symbol in the status bar
the device is not charging and a computer cannot recognise the device.
the device makes charging noises and indications when connected to the computer
the device is not actually charging at all.
there is no apps that could be using unnecessary power. I have stopped the google play service etc. there is only 3 services running.
the loss of power is continuous, even when powered off the device battery continues to loose power.
I am presuming that there is a short circuit within the power sub assembly that is causing this continuous power loss. My reasoning for this is that the operating system is functioning and capable. A fault within the micro usb could cause the effects mentioned above.
the only possible faults are the micro usb port and or the cable that connects the power sub circuit to the motherboard. the cable runs under the battery and the pins are micro size. (it would take 2 people to properly analyse this cable.)
regardless of my particular fault, the advice that i would seek is in regard to any test that I should do to prove either way which part I need to replace.
is there a way to bypass the micro usb connection and power the device via the cable that connects to the motherboard
I have used many different micro usb leads and chargers. The factory charger and lead will charge other devices.
windows 7, windows 8.1, linux mint and ubuntu 14.04 are the different computer systems that will not recognise the device although they will appear to be charging the device without actually increasing the charge at the battery.
I have not found any other nexus users with a similar problem.
Using a moto g, samsung GT9305i, Samsung 5380i, Samsung 5570, all rooted and custom roms.
I will Bluetooth a ROM to the nexus and attempt installation.
Just to eliminate any doubts that could be related to using the m2 version of CyanogenMod 11
I am on 137.35-5, unlocked/rooted and all has been working perfectly. Yesterday the phone powered down due to low battery despite being plugged into the stock turbo charger. After a little bit of troubleshooting, I've determined that the phone thinks it's plugged in (icon shows charging bolt, OS battery details shows "not charging"). In fact, even with the phone powered completely off and disconnected, if I tap the power button, it'll show the semi-circle battery status with a charging symbol.
I've used my air compressor to blow out the USB port, no change.
I've tried other cables, other chargers, no change
I've booted into recovery, where it shows "XX% battery" - though I don't recall if the charger is supposed to work when in TWRP.
GSAM shows it's charging with "calculating remaining time" never clearing.
If I leave the phone ON while connected to any charger, the battery will eventually die.
If I power off the phone, it will charge - about 50% increase in 8 hours (overnight).
Using a USB tester, I see that it's pulling 0.01-0.05a at 5V at all times.
I've attached some screen shots of the phone disconnected.
My next step was to do a factory reset (using the OS/GUI reset vs. Recovery) - but I figured if the phone-off screen is showing it's connected to a charger (without the phone even being turned on) then it's probably a hardware issue, no?
FWIW, yesterday, I plugged in a newly received OTG external camera (borescope from china). It worked fine on wife's LG V10, so I gave it a try on mine. It powered up, and the phone recognized it as a USB2.0 camera (though none of the camera apps showed an image). Perhaps that fried something?
Very likely a hardware problem. Turn your phone off, grab a toothpick and gently poke around the port, it could be that some debris shorted out the contacts. Also check if the "tongue" with contacts inside the port is bent downwards by comparing it to a port that works, a quick Google search showed that it helped a lot of people facing the same problem (link). If you follow the solution in the link, do it with a non-conductive object.
If it doesn't work, and you still have your phone's receipt, try flashing stock rom and recovery and relock your bootloader (if your phone is recognized when plugged in to the pc) and go to your service center for repair. Some service centers don't even care if you unlocked your bootloader before, especially if it's a hardware issue (check out this article, it includes a statement from Motorola, though I'm not sure if it's still valid since Lenovo acquired Motorola).
If there is no evidence that unlocking the bootloader caused the problem, you're protected by consumer rights in most countries (especially those in EU).
Have had a stock Le Pro 3 since Dec 2016. No real issues prior to the last few days.
1. The device will only charge when powered ON. If powered OFF, the phone will vibrate once, the LED indicator will briefly come on, then turn off. Unplugging it and plugging it back it again does literally nothing--no vibration or LED indicator.
2. The device will not power on while plugged in. It will simply vibrate after a few seconds, then nothing.
3. The device will not connect to my PC for data. Have tried four different cables without success. It will charge from PC, however.
4. When connecting to USB and powered ON, the phone will vibrate and show the battery charging indicator, but will then hesitate slightly (battery charging indicator turns off), then shows the battery charging indicator again. Not sure if that means anything, just seems odd given everything else.
5. USB headphones do not detect/work.
6. The USB to 3.5mm adapter for headphones does work.
I've tried a factory reset to no success and have ordered a replacement USB C board just to be safe (it was $5 shipped), but am at a loss as to what to do. Tempted to let the battery drain completely and see if that puts everything into working order, but as it's my only phone, that seems a bit risky if I can't be sure it will ever start charging again while powered down.
Anyone here run into these sorts of issues before and any advice if you have?
sherlockjr said:
Have had a stock Le Pro 3 since Dec 2016. No real issues prior to the last few days.
1. The device will only charge when powered ON. If powered OFF, the phone will vibrate once, the LED indicator will briefly come on, then turn off. Unplugging it and plugging it back it again does literally nothing--no vibration or LED indicator.
2. The device will not power on while plugged in. It will simply vibrate after a few seconds, then nothing.
3. The device will not connect to my PC for data. Have tried four different cables without success. It will charge from PC, however.
4. When connecting to USB and powered ON, the phone will vibrate and show the battery charging indicator, but will then hesitate slightly (battery charging indicator turns off), then shows the battery charging indicator again. Not sure if that means anything, just seems odd given everything else.
5. USB headphones do not detect/work.
6. The USB to 3.5mm adapter for headphones does work.
I've tried a factory reset to no success and have ordered a replacement USB C board just to be safe (it was $5 shipped), but am at a loss as to what to do. Tempted to let the battery drain completely and see if that puts everything into working order, but as it's my only phone, that seems a bit risky if I can't be sure it will ever start charging again while powered down.
Anyone here run into these sorts of issues before and any advice if you have?
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A $5 board will not solve your problems. It will likely get you into deeper trouble because it doesn't support mtp and otg. It's only good for charging.
Your connector is probably damaged. You can try contact cleaner/lubricant on the connector. It may fix your issue. Something like this https://www.electrolube.com/products/contact-lubricants/eml/contact_cleaner_lubricants/
I use lubricant often on usb-c connectors even if they are working. Just extends the lifetime of connectors, the pins are really small after all so the contact surface is not much.
Replacing the usb-c board is not an easy task. You would need to remove the screen etc.
Hey everyone, it's my first post here and I'm glad to meet you all.
Recently, I updated my SGS7 edge using OTA updates and it failed to turn on after(stuck on bootloop on samsung logo). While i managed to turn it on after wipe in recovery mode, battery percentage decided to drop to low percentage (not sure what exacly, but to the point I decided to charge it). It shows alert about wet USB port, and I'm sure it wasn't wet at all, but I decide to stop charging and let it dry for few hours. Battery lost its charge completly while it was drying. After few hours i pluged it again, and it was charging (at least i thought so). After 2 hours of charging it managed to charge 1% of battery and then it turn off. When I measure the current flow to the battery it shows 90mA when I plug charger, then it drops to 0 mA after few seconds. When I press buttons it shows that current is flowingh again, but never more than 90mA. Anyone knows what can be a reason for such behavior? Is it charger port broken, or firmware malfunction?
EDIT: I've trierd to charge it for a bit with power button pressed. Now it shows that current is equal to 170mA and it keeps flowing without button pressed.
EqRazzielson said:
Hey everyone, it's my first post here and I'm glad to meet you all.
Recently, I updated my SGS7 edge using OTA updates and it failed to turn on after(stuck on bootloop on samsung logo). While i managed to turn it on after wipe in recovery mode, battery percentage decided to drop to low percentage (not sure what exacly, but to the point I decided to charge it). It shows alert about wet USB port, and I'm sure it wasn't wet at all, but I decide to stop charging and let it dry for few hours. Battery lost its charge completly while it was drying. After few hours i pluged it again, and it was charging (at least i thought so). After 2 hours of charging it managed to charge 1% of battery and then it turn off. When I measure the current flow to the battery it shows 90mA when I plug charger, then it drops to 0 mA after few seconds. When I press buttons it shows that current is flowingh again, but never more than 90mA. Anyone knows what can be a reason for such behavior? Is it charger port broken, or firmware malfunction?
EDIT: I've trierd to charge it for a bit with power button pressed. Now it shows that current is equal to 170mA and it keeps flowing without button pressed.
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Click to collapse
The way you've described it almost sounds like a short. It may also explain the difficulty with OTA (short). The S7 USB charging port may be suspect but also the battery may be at end of life. To eliminate the other usual suspects, have you tried a different USB cord and/or charger? Does your S7 show as connected when plugged into PC (either through adb commands or file explorer)? Have you tried charging using a wireless charger?
If needed, the good news is charging port isn't too difficult to replace, granted you have a heat gun and a few tools (google S7 teardown -- iFixit or youtube). If you're convinced the port is bad and decide to replace it, might as well replace battery too (OEM only). After the above mentioned process of elimination you're left thinking software, maybe download model specific required firmware (matching current binary) and familiarize yourself with ODIN flashing.
Aimless Rambler said:
The way you've described it almost sounds like a short. It may also explain the difficulty with OTA (short). The S7 USB charging port may be suspect but also the battery may be at end of life. To eliminate the other usual suspects, have you tried a different USB cord and/or charger? Does your S7 show as connected when plugged into PC (either through adb commands or file explorer)? Have you tried charging using a wireless charger?
If needed, the good news is charging port isn't too difficult to replace, granted you have a heat gun and a few tools (google S7 teardown -- iFixit or youtube). If you're convinced the port is bad and decide to replace it, might as well replace battery too (OEM only). After the above mentioned process of elimination you're left thinking software, maybe download model specific required firmware (matching current binary) and familiarize yourself with ODIN flashing.
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Click to collapse
I managed to charge the device, I left it plugged into charger with power button pressed and it started after ~2 hours. Now, I'm trying to charge it to 100% just to backup my data. Really appreciate your help tho.
I was trying 4 different USB cables, 2 chargers and powerbank. Device wasn't recognized by computer by any means. I have no access to wireless charger unfortunately. I'm not gonna replace any part of it becouse it is time to change it to newer model I guess.
EqRazzielson said:
I managed to charge the device, I left it plugged into charger with power button pressed and it started after ~2 hours. Now, I'm trying to charge it to 100% just to backup my data. Really appreciate your help tho.
I was trying 4 different USB cables, 2 chargers and powerbank. Device wasn't recognized by computer by any means. I have no access to wireless charger unfortunately. I'm not gonna replace any part of it becouse it is time to change it to newer model I guess.
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Hopefully all is well then. I wouldn't rule out repairing the S7E, it's still a competitive device. Newer phones are fine if you can afford it but I prefer proven devices with development and software support. Granted, it is a personal preference. For the same price of a new flagship phone I can justify to the wife fiddling around with 5 or 6 old ones (ha):laugh:. Other than an LCD/digitizer most parts can be gotten pretty cheap and there's always [insert any online sales (ebay/swappa/amazon)] in order to acquire a salvage device for parts.