Hi,
I've seen this thread which may be related: https://forum.xda-developers.com/showthread.php?t=3866913
I have a Mate 20 Pro linked to a Dragonfly Red DAC using an OTG cable from the USB C port. Regardless of music playing app (e.g. USB Audio Player Pro, TIDAL) the music cuts out periodically due to failing to detect the connected DAC. Sometimes it re-detects and re-initialises successfully, other times it requires unplugging the dac and reconnecting.
The phone's USB C port has behaved fine for charging and data transfer when connected to a computer
The Dragonfly DAC has behaved fine when plugged directly into computer's USB port.
This could be a physical defect/connectivity issue in the OTG cable (I don't currently have a spare to test with) or it could be an issue with the phone shutting down the USB device. My immediate suspicion related to power/battery management but having ploughed through the settings I can't see anything obviously relevant.
I plan to try:
- another OTG cable
- testing with the phone battery fully charged
- testing with the phone's battery explicitly set to 'High Performance'
Anyone seen this/anything similar?
Thanks.
This is happening to me also with the same phone.
Its not the cable.
Apparently this phone has an issue with the USB driver.
I just brought Fiio KA3 usb DAC i am using POCO F1 with Oxygen OS ....
1st day i didn't encounter anything like this but now its happening after 5-7 mins every time it disconnected and reconnect automatically...
rbrierle said:
Hi,
I've seen this thread which may be related: https://forum.xda-developers.com/showthread.php?t=3866913
I have a Mate 20 Pro linked to a Dragonfly Red DAC using an OTG cable from the USB C port. Regardless of music playing app (e.g. USB Audio Player Pro, TIDAL) the music cuts out periodically due to failing to detect the connected DAC. Sometimes it re-detects and re-initialises successfully, other times it requires unplugging the dac and reconnecting.
The phone's USB C port has behaved fine for charging and data transfer when connected to a computer
The Dragonfly DAC has behaved fine when plugged directly into computer's USB port.
This could be a physical defect/connectivity issue in the OTG cable (I don't currently have a spare to test with) or it could be an issue with the phone shutting down the USB device. My immediate suspicion related to power/battery management but having ploughed through the settings I can't see anything obviously relevant.
I plan to try:
- another OTG cable
- testing with the phone battery fully charged
- testing with the phone's battery explicitly set to 'High Performance'
Anyone seen this/anything similar?
Thanks.
Click to expand...
Click to collapse
If you found any solution please shair
Related
Hello all,
Honor 7,
PLK-UL00
B341 and EMUI 4.0
Android 6.0
Im unable to use my phone as USB Mass storage device. When i connect my phone to PC sometimes im getting as USB device not recognized and sometimes im not. I tried different PCs and different cables. ITs ONLY CHARGING
tried cleaning the micro usb port, uninstalling and reinstalling drivers in Pcs but it didnt work.
I switched off my phone, removed mem card, reinserted it, swithced it on again, connected my phone to PC(in sleep mode)
phone is detected as storage device and got notification in notification panel to select as charge only/files mode/ photos mode.
After ejecting and removing cable again back to issue. No detection. OTG also not detected. No Data transfers are being made but its only charging( even through Car USB port)
Anybody facing USB not recognised problem ? i hope its software related.
could anyone let me know of solution.
Thanks.
I am also facing the same issue
I thought I was alone in this issue.
Basically, my problem is, the wall charging and USB connect are reversed. i.e., I connect my wall charger, its showing as USB mode and when I connect the cable to a PC, its showing as AC Charging. I tested with Ampere app and when I connect to AC Charger, it is drawing only around 300mA(like it would do if connected to USB) and its drawing around 1.5A(like it would do when connected to wall charger) when connected to USB PC.
I have been having this issue for quite sometime and recently, I had upgraded to Marshmallow through OTA upgrade. I thought atleast this upgrade would fix this issue but I am still facing the same issue. I even contacted the customer care and nothing useful advice other than restoring to factory settings was suggested(which I tried and didn't work).
I guess it should be some software issue but don't know what it is or how to fix it. Any inputs would be welcome.
Hey guys,
I'm using my tablet in my car and have it connected to a Kenwood radio which has two USB ports. The radio can recognize the android device and changes automatically to USB as an input and then my steering wheel controls don't work anymore.
So as a workaround I bought an USB adapter which only connects the power pins. But with this adapter, the tablet is not charging. The cable itself is working as intended with another phone, so it has to be something special about the tablet.
Does anybody know if there is a way to use a data connection via USB to only give power to the Z2 tablet?
Man, somtimes I'm just an incredible idiot. The Xperia Z2 Tablet has a dedicated charging port at the bottom for which I already have a cable. So, I'm going to use that.
Sometimes the solution is so damn obvious
Another bug i noticed is the OTG. I noticed that there is a limit in terms for power draw a USB-C OTG device can receive from the USB-C port of the Mate 20 Pro. USB Power automatically shutsdown depending on a certain current draw and the scenario is somewhat random. This error has been persistent until now with the current version of the F/W (.126)
Although from the phone notification, "Supplying power to the connected device over USB" is present, you will notice from the LED indicator of device attached to the USB port shuts down right after you plug it. If you attempt to re-plug it, usb power is randomly restored.
I am using a USB-C usb hub with HDMI port as the OTG device. I tested this device with another phone (P10, Samsung, etc), power is stable.
I actually have the some problems reading my otg with a USB drive connected. The connection is intermittent. Sometimes it can read the drive and sometimes it can't. I tried it on my P20 Pro and it's working fine. It will be great if others can try it out and review it here.
I'm on version 9.0.0.183 (patch05). Thanks
No otg problem hdmi desktop mode
I am on emui 9.0.0.198 and I have no problem connecting my television through hdmi without extra power. Although at first the connection failed (tv screen showing red stripes and intermittently switching to black screen) and I had to change hdmi cable. Desktop mode worked fine after that hdmi replacement. Maybe just hdmi does not draw much power.
Mate 20 pro.
I bought a usb-c to hdmi cable, it connected to my new LG PC monitor a few times with no problems. But recently (no sure when or why) it will not connect to the monitor but it will connect fine to my Samsung series 7 TV.
The phone notification says the phone is supplying power to the usb device.
I have a ugreen 16gb USB/usb c flash that I used to use on my p20 lite and it worked fine. I tried it with my mate 20 pro and it does not work. I also have a hdmi/usb c for desktop mode and that works with no issue.
I purchased USB c / female USB adapter and when I plug in my OTG USB memory (that does not work when plugged into the phone) now works perfectly.
Hello Everyone. I have a Mazda 3 with Android Auto that does not natively support FLAC files. So I figured out a Solution where using Android Auto I am able to use MD Player to play the flac files on my phone. Now before anyone says that I am streaming over Bluetooth so it doesn't really matter. I am also able to go into my Mazda Bluetooth settings and Set Bluetooth to only be the source for Phone calls. This forces Android auto to send the Sound over USB. And there is a huge difference in Sound. For example over Bluetooth I have to crank up the sound to 3/4 to hear what I want while over USB Audio i get the same volume at 1/2. There is also a clear difference between Flac and MP3. Especially at higher volumes.
When I discovered I could do this I thought to myself let me order a USB C Hub, connect my Phone to the HUB, Get a USB male to USB male cable for Android Auto and a 256gb Thumb Drive to fill up with Flac Files. This is where my problems start. Connecting the 256gb Thumb Drive to Hub works perfectly, except that I have to use FAT 32 which is fine, since I wont be using this for movies. When I connect the Android Auto cable to the Hub though it does nothing I tried a USB 2.0 and a USB 3.0 cables to see if that would make a difference. I also tried using a USB OTG adapter without the HUB to see if that launches Android Auto and it does not work either. I tried using my old phone a Nexus 6p and it also did not work. So now I'm thinking Android Auto does not like USB OTG. Could this be Kernel Related? Or am I wrong to assume that something like this would even work on a Phone.
Additionally I bought a USB C powered hub so I can charge the phone while in the car. But when I connect power to the device it charges the phone just fine but it will no longer see the Thumb Drive. If I disconnect power it will not recognize the thumb drive until I restart. So far I have tried 3 hubs. The first one was the cheapest one I could find so I thought that could be the problem. I then tried another Hub I had lying around with the OTG Cable. This did nothing, finally I ordered a nice Anker Hub that works just fine with my wifes Macbook Air, but not with the phone. Any help or Guidance would be appreciated. I am open to installing a custom Kernel if this will solve the problem. Thank you.
Did you ever find a solution? Looking doing the same thing with my pixel 3 xl and either a thumb drive or ssd. I think it has to do with the way the otg cables are wired. The data pair might be the same for the drive as android auto. The otg cables dont have all pairs wired as a true y cable.
Thanks
I want use the V30 as a streaming audio device and connect it to my HiFi setup via external DAC - audiolabs mini M-DAC. This DAC has an PC/Android OTG micro USB port for connectivity and also a built in battery for optional portable use. I leave the DAC plugged into power and don’t use it as a portable device.
When I connect the V30 to the audiolabs mini M-DAC using a standard USB-C to micro USB cable the phone goes into USB “Power Supply” connection mode. Although the audio works fine with the DAC using the USB Audio Player Pro app it rapidly depletes the phone battery.
I have tried to manually switch the USB connection mode to “Charging” and others but it just reverts back to Power Supply connection.
Can anyone help figure this out ?
I’m guessing the issue is to do 2 way charging offered by USB-C port. Ideally I would like the phone to be able connect to the DAC and receive power From it. If I use a standard usb2 to micro usb cable with a USB2 to USB-C adapter could this stop the phone discharging issue ?
My phone is Rooted if that helps.
This is exactly what is happening to me using a LG G6 and ifi DSD micro black. You change it to anything other than power supply it just reverts instantly to power supply and as you said drains the hell out of the battery.