Is there a minimum battery level for OTG support to work?
I have OTG support on my Mediatek Blackview BV6000 which works very well.
However, sometimes when I connect say a hard drive to my phone (via OTG) the hard drive doesn't start and the phone doesn't see it.
This seems to happen when the battery level drops below 70%, but I'm guessing.
This happened again recently so I went and charged my phone and the OTG support came back.
I'm wondering if this is due to some internal mechanism built into Android 7 or the phone where OTG support is stopped when the battery level drops below 70%. Has anyone ever heard of this?
If so, is there any way around it?
I recently learned to use a 'Terminal apk' to change the internal settings of my phone to allow my 'file manager' to see my hard drive when attached to the phone. It now works great. I was hoping that there would be a similar method to override this 70% limit for OTG support if that is in fact the problem.
Can anyone help?
Related
I often use the combination of a laptop with a smartphone on my way from home to work and back: the smartphone is used as an internetmodem for the laptop, and the USB-cable is used for the data-transfert between the 2.
Unfortunately the battery-capacity of the laptop is not enough to support both the use of the laptop and meanwhile charging the smartphone battery. So I would like to prevent the phone-battery to drain (too much) power from the laptop-battery. I can't switch off "charging through USB" in the phone since USB is the only available option to charge it. And -as I have learned from another thread in this forum- cutting the powerleads is no option too since the data-connection requires a minimumcurrent in order to work.
But what if I would modify the USB-cable with a small electronic circuit that would limit the current through the USB-cable to a value of about 50mA? That would be enough to enable the dataconnection but would prevent my laptopbattery being drained by the phone. Does anybody here have any experience with such a cable?
I have no issue getting my Chord Mojo working with the UAPP app on my S8+ but when I try to use band camp, youtube or any other apps it will not route audio to the DAC properly. Note that UAPP uses a proprietary driver for routing data to the extetnal DAC. A notification comes up when connection Mojo to S8+ via micro usb-usb c otg cable(see screenshot below)
I have tried every option in the normal settinsg and developer mode but no matter what it just reverts back to "charge connected device". I have played around with all the USB settings in Developed mode;
Prevent automatic usb routing
Setting the usb device to audio source,
/MTP
Etc
Nothing works.
I even uninstalled UAPP, attached Mojo and opened band camp, still nothing. Worse yet, often it will freeze with Mojo connected and then restart itself or get stuck on the carrier boot screen during restart.
Seems that Android system is not allowing the device to connect properly although I can't be sure. I just want to be able to send all my audio to my exceptional Chord Mojo. Bummer because everything worked fine on S7 Edge running Android 7.0 when I selected MTP under developer options. Unless there's a fix I'll only be able to use Mojo with UAPP.
Im having very similar problem on S8, got an OPPO HA2 DAC, have bought a micro USB to USB C cable, and the phone is charging the DAC? It doesnt let me change the output as per your screen shot above.
Can anyone help?
I've ordered the meenova c to b otg cable, will report back.
i use andoird4viper with my DFR and it works. just had to lock the effect to headset and it should work system wide, as least for my case.
The meenova off cable made no difference with regard to getting Mojo to work with apps other than UAPP.
mstormer said:
i use andoird4viper with my DFR and it works. just had to lock the effect to headset and it should work system wide, as least for my case.
Click to expand...
Click to collapse
I'm not rooted and don't want to root.
Still no fix in sight but it is definitely a software issue and most likely with Android system processes.
Got my Pixel 3 XL yesterday and absolutely love it...
Just in case anyone else experiences issues I thought I would post this - did an online chat with Google and they think it might be a bug in the OS.
Connecting to my PC or Car, the device was showing the USB options when you swipe down for notifications permanently on Charging Only. Even changing this from that drop down had no effect. I could see the device on my PC but unable to view files/folders and unable to copy anything to the device. Similar symptoms in my car, the device would charge fine but no matter what I did it wouldn't connect to my Infotainment System.
To fix this I had to enable Developer Options, scroll down to Networking and there is a "Default USB configuration" setting. This was set to "No data transfer", I changed it to "File transfer" and rebooted and now everything works fine.
Hopefully this might help others :good:
Does your phone fast charge while using Android Auto?
I don't think so, how can I check that.
I've only had the device a couple of days now but have noticed that when I'm using it in the car running Google Maps and streaming music via AA it still seems to charge.
Doing the same on my original Pixel XL I would loose 1-2% over about 30-40 mins, not sure if that's just because the battery was starting to deteriorate.
Thanks, but for some reason that didn't work for me. Tried this with and without USB debugging and car is just not seeing the phone for AA, but charges it fine. Also tried 4 different cables just in case, if I plug in an S8+ to any one of those cables it works perfectly with the car.
[deleted, "wrong thread" mistake]
Hello all,
I was facing issue when I attach my usb drive to my phone through otg that when I'm coping anything to usb it was disconnecting from itself, tried many otg devices and also changed my usb drive and still the problem exists, after too much time search I found strange fix for this problem but worked at last, The fix is to turn on (Airplane mode), I don't know how and why sim cards affect otg but at all my otg works great and coping 10 GB for 1hr without disconnecting issue
Also, make sure that the following apps have no Battery optimization limit: File Manager, External Storage, MTP host, System UI, and also the app you use to copy files. To make this on MIUI 11 go to Settings, Password&Security, Privacy, Special Access, Battery optimization, and then Show all app and make all app mentioned (Not battery optimized)
Also make sure that System UI app has all notification is show and has high priority.
magaedy said:
Hello all,
I was facing issue when I attach my usb drive to my phone through otg that when I'm coping anything to usb it was disconnecting from itself, tried many otg devices and also changed my usb drive and still the problem exists, after too much time search I found strange fix for this problem but worked at last, The fix is to turn on (Airplane mode), I don't know how and why sim cards affect otg but at all my otg works great and coping 10 GB for 1hr without disconnecting issue
Also, make sure that the following apps have no Battery optimization limit: File Manager, External Storage, MTP host, System UI, and also the app you use to copy files. To make this on MIUI 11 go to Settings, Password&Security, Privacy, Special Access, Battery optimization, and then Show all app and make all app mentioned (Not battery optimized)
Also make sure that System UI app has all notification is show and has high priority.
Click to expand...
Click to collapse
it worked for me just one time and not work again, im tired to turn OFF and ON my device and connected and disconnected usb many time to work . it was bug xiaomi (my phone is Poco F3)
Hello All,
I stumbled upon a problem with my Mate 30 pro. When using a USB stick and or USB card reader I can only select "use USB to reverse charge". When selecting the other options like transfer photos or transfer files the selection jumps after 2 sec back to reverse charge.
I use File manager to transfer pictures from my phone to my computer via a stick and due to this it fails to do this, well it fails to transfer pictures from my phone to my USB stick, from the stick to the phone works...
Using the internal file manager then it works...uninstalled file manager rebooted the phone and reinstalled did not solved my problem. I prefer to work with the file manager from play store and not the internal one...
Google play store is on the latest version, well the same version like on my mate 20 pro.
Just realized that my mate 20 pro is doing exact the same, but there transfer files/pictures from phone to USB stick works.
Have u tried developer options - USB debugging?
viruz1225 said:
Have u tried developer options - USB debugging?
Click to expand...
Click to collapse
Yes I did, also tried to change the same setting - USB config - in the developer options but there it also reverts back to charge only.
I see the exact same automatic return to "Reverse charge" after 2 seconds using OTG, but I can use the internal file manager, so I am not
bothered so much by that. What bothers me is that I want to charge normally (opposite of "Reverse Charge") using OTG since I am using
"Accessory Charging Adaptors" (i.e., I am using an OTG USB Hubs with a power supply included). After many experiments, I see no way to
simultaneously charge my Mate 30 Pro and use an OTG device - Has anyone found a way to do this?
If ACA doesn't work, then chances are that your USB controller driver doesn't have it implemented
[KERNEL] (Patch) USB OTG (host mode) + simultaneous charging!
(I really struggled with where to post this. Although much work and effort went into debugging unique Z5-specific issues, this is based on prior work so I put it here instead of in "original"; also, I would be very surprised if this didn't apply...
forum.xda-developers.com