[Letv Le Max 2] Stuck in Headset Mode / USB-C file transfert not working

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Maxelpulpo

Member
Sep 6, 2018
7
1
Hello,

I have a small problem concerning the USB-C port.

After connecting my bluetooth earphones, the terminal was stuck in headset mode. I tried to format data, to install again the rom, I made a factory reset, I tried different rom AOSP ... nothing

When I connect wired headphones, the sound works but when I disconnect them no sound works (phone calls and media for speakers or earpiece). I know the earpiece and loudspeaker are working because I tried SoundAbout under android 7.1.0, but this application does not work with android 8.1.0 or 9.0-Alpha

File transfer does not work either, but when I connect my device fastboot, adb recognizes it, when I connect it via android, only charge works.

I think the problem is related to the USB-C port, I cleaned it but it does not change anything ...

Maybe there is another solution that I have not explored yet ...

Thank you for your help.
Best regards

(sorry for my english)

Max.
The Max 2 X829 (treblized)
Android 9.0 alpha (AospExtended-v6.0-x2-20180908-1833-ALPHA)
 

Maxelpulpo

Member
Sep 6, 2018
7
1
Hi,

I downgraded to Android 8.1.0 [AOSPExtended [treble] V5.7-official] then I rebooted the system with the charging cable plugged and the sound came back ... weird :cyclops:

But If I reboot without the charging cable, the terminal stays into headset mode...
Data still not working

I don't know why ?

Someone get an idea ? What is the problem ? Any solution ?

thanks
 
Last edited:

sirnonox

Member
May 17, 2015
12
1
Hello

sorry for a bit of necro :)

I also have the problem.
I use Audio Router from playstore which works like Sound About but is compatible with 8+ Android.

I also have problems that appeared all of a sudden at the same time:
- same faulty sound behaviour
- usb mtp/adb not available (under recovery and under Android)
- It also seems that my battery will not charge as fast as before though Quick charge is enabled.

pluging/unpluging will not bring the notification to modify the usb link behaviour.
I also tried enabling/disabling usb debugging options...

This happened after trying/flashing many roms so I don't really know which one would have caused evil :/
Do any treble rom could harm the device like this by altering the vendor partition or has it nothing to do with it ?

about usb under pie roms :

The options are greyed under Usb Preferences.
In developer mode, changing the default usb behaviour does nothing.
I have tried 2 USB C cables.
Both are working with my X820 only in bootloader mode.
And both are working fully with my second LeEco (x525).
So i don't think the cables are faulty.
And as it is working also in bootloader mode I suspect there is some lockdown somewhere hidden in my partitions.
But I can't find anything.
I also fully restored the X820 to stock and the problem remains.

under eui roms :

Same problem
No usb configuration available

If anybody could help that would be awesome.

thanks in advance :)
 

sirnonox

Member
May 17, 2015
12
1
I would recommend you to reflesh phone with qfil.

Thanks for replying.
I have already done that (full qualcomm reflash with FlashOne & QFil image).
The problem still occurs.

This is very strange behaviour...
The phone is pretty new and I did not make it fall or whatever missuse.
The usb-c is still working in FastBoot Mode (but not mtp/usb file transfer nor usb debugging/Adb) and I can still charge the phone when not using it.
And about the audio problem it can be fixed with an app (audio router/sound about/...) so I am pretty sure it is pure software issue but I can't find any more information about this.

Is there any other system internal partition or else that is not flashed with every rom (other than vendor) and that could be different amongst the x82x devices ?
I have also tried flashing some modem files (not all) maybe this can be linked to this problem ?

Thanks
 

kihope12

Senior Member
Sep 2, 2015
734
286
České Budějovice
Thanks for replying.
I have already done that (full qualcomm reflash with FlashOne & QFil image).
The problem still occurs.

This is very strange behaviour...
The phone is pretty new and I did not make it fall or whatever missuse.
The usb-c is still working in FastBoot Mode (but not mtp/usb file transfer nor usb debugging/Adb) and I can still charge the phone when not using it.
And about the audio problem it can be fixed with an app (audio router/sound about/...) so I am pretty sure it is pure software issue but I can't find any more information about this.

Is there any other system internal partition or else that is not flashed with every rom (other than vendor) and that could be different amongst the x82x devices ?
I have also tried flashing some modem files (not all) maybe this can be linked to this problem ?

Thanks

It looks like software, when does it stoped
working?
 

sirnonox

Member
May 17, 2015
12
1
It looks like software, when does it stoped
working?

I am not really sure because I installed many roms for geekly testing purpose :D
And I can't remember exactly since when It happened...

I ordered my phone from China so I got a chinese eui and modem version but I don't remember which modem version it was...
though I am not sure it can be important or not here...

Currently I went back to SmallEui by Aurel.
 

jo_keks

Member
Oct 24, 2008
26
11
Xiaomi Mi 8
This sound exactly like the problem I have.

I am sure it is not hardware related. I even replaced the usb port/flex cable.i don't know which ROM brought me to this stage. Maybe it was linage 15.1, build 20181201, but I don't think it's linage's fault. Because flashing an other ROM doesn't help.

Is there any partition that is not touched by flashing qfil zip file?

Maybe someone can provide twrp backup of all partitions that are reachable by twrp. Hopefully we can find the wrong part this way.

Regards
Jo
 

sirnonox

Member
May 17, 2015
12
1
So yesterday I flashed again with qualcomm qfil (2 or 3 times) and I finally got back the audio, usb (debugging, mtp and charge).
I do not understand why but the at 1st attempt the audio problem was still here
at the second attempt the audio problem disappeared but my internal storage went partitioned down from 64 Gb to 16 GB
and finally at the third attempt It worked though I had to perform a final factory Reset from Android Settings because the internal storage was filled up to 50 Gb with leeco default garbage....
Everything looked good then and I was happy at last!

But then today suddenly it stopped working again...

I don't know what exactly is in cause...

since yesterday
- I played around with the usb-c / jack audio adapter
- I restored my apps
- I plugged the phone in another usb-c power cable (with magnet pin)

I will try again to fully restore and see what exactly is in cause of the problem...
The other Usb-C seems to be problematic though I am not sure it is the only one to possibly cause the issue....