Develop Bugs

Windows won't recognize t989

Hello all!
First: I promise I searched the forums and google as hard as I could!
I'm running AOKP JB with CWM, although the problem was present on stock ICS from T-Mobile.
Symptoms: Computer and phone will refuse to acknowledge any connection (nothing shows up in Device Manager), except the phone will still charge. If I do the "remove the battery with USB plugged in" trick, the first time I do it, it will recognize an unknown device, but kies and adb won't recognize it. If I unplug it and plug it back in, it'll go back to not acknowledging any connection.
I previously programmed it (when I was still running stock ROM) via ADB via WiFi, but I need to be able to use ADB via USB. Besides, I can't seem to get ADB over WiFi anymore.
When I plug it into a different computer (Win7), it will, however, recognize my phone.
Earlier this year, before I ever tried programming via WiFi, it connected to my Win8 machine with no problem. I don't think it's a problem with the wifi setup though because the ROM was reinstalled and of course I've restarted ADB in USB mode in the months since...
What I've tried:
Reinstalling Kies
Reinstalling Samsung USB drivers
[^]Restarting the ADB server
Updating ADB
Trying different USB cables
Trying different USB ports
Toggling USB debugging
Toggling MTP mode
The UART thing from the dialer
Restarting the phone and the computer (of course)
Checking to see if my computer's USB drivers need to be updated
The android terminal command "setprop persist.sys.usb.config mass_storage,adb"
Pulling and replacing the battery while connected via USB
Crying in a corner
If anyone can help me, it'd be greatly appreciated! I'm all out of ideas and Google is no longer helpful =/

try to uninstall the drivers that are present anything samsung related to your drivers ... then connect the phone and let the process do its thing if you have the samsung drivers saved on your PC and the drivers still aint working update the drivers and then manually click where the drivers are to install them and hopefully it will work and when you tried MTP is it the only option it gives you no storage or anything ??... and is usb debugging on when you are trying all this ??

krazierokz said:
try to uninstall the drivers that are present anything samsung related to your drivers ... then connect the phone and let the process do its thing if you have the samsung drivers saved on your PC and the drivers still aint working update the drivers and then manually click where the drivers are to install them and hopefully it will work and when you tried MTP is it the only option it gives you no storage or anything ??... and is usb debugging on when you are trying all this ??
Click to expand...
Click to collapse
I tried on my work computer that didn't have any samsung drivers and when the "unknown device" dialog popped up it didn't do anything or install anything, nor did it show up in Device Manager. Unplugging and replugging it back in did not reproduce the dialog box. Togged USB Debugging and still no dialog box saying it recognized it.
The thing with the samsung drivers is that they're self installing so even if it popped up in Device Manager, I wouldn't be able to manually update the drivers =/
I tried MTP both with and without USB Debugging, although it also gives the option for PTP.
At this point do you think I should unroot and go back to stock? It's not been recognized on three computers now! =[

Are you using the stock cable? My computer wouldn't recognize mine without it.
Sent from my SAMSUNG-SGH-T989 using Tapatalk 2

foltz61 said:
Are you using the stock cable? My computer wouldn't recognize mine without it.
Sent from my SAMSUNG-SGH-T989 using Tapatalk 2
Click to expand...
Click to collapse
Both the stock cable and a generic cable.

Similar problem
Similar problem as the OP. And hi guys, it's nice to be on these forums.
My device, when I plug it in using the stock cable, doesn't even charge. It doesn't show up in device manager, nor does it give me a notification, or say it's unsupported and bear that yellow icon. I have tried using different USB ports, I have tried the toggling USB debugging, I have tried restarting phone, computer, and taking out battery. I have tried that PDA/MODEM dialer trick. I am using 4.1.2 Jellybean, not rooted. (that WAS my goal,, until I hit this roadblock) I have not connected it to the computer in the past, it's relatively new. I'm thinking the cable is bust.
Any suggestions would be appreciated. It charges fine through a wall outlet plug, be it generic or stock.

so guys ive come to a conclusion i think its something in the samsung usb cables try getting yourself a blackberry usb cable , TRUST ME !!! ever since i got my phoness etc... tablet and yadi yadi samsung usb cables have always seemed to give me problems i think its because they are multi data/charging cables and when using the blackberry usb cable i have never ever once encountered a problem with any of my phones sd/storage problems do yourself a favor and pick up one of those cables and you will be golden !! if not then i guess im the only lucky one :LOL here you go http://www.amazon.com/Blackberry-Travel-Adapter-Micro-Cable/dp/B004VMVSYK/ref=pd_sim_cps_2 5 bucks!
Edit also one more test boot into recovery and click in the advanced menu and see if mount usb works for you in recovery mode ??

FIX (try using a generic cable)
I actually solved it on my own! After borrowing a generic cable from a friend it booted up! The Samsung cable was just not doing its thing.

yeah im telling you those cables they provide are JUNK!!! i only use my samsung to charge because they do that well but data they are str8 CRAP!! glad you got it up and going

OP
Hope OP will have the same luck as me...pray to the Android gods...

Lol:thumbup:
Sent from my SAMSUNG-SGH-T989 using xda app-developers app

[Help] Problem connecting OP3 to computer in MTP mode

Hello everybody,
I received my OP3 yesterday and I'm quite happy with my phone, but I'm having an worrying problem with the USB connection. Indeed, I cannot seem to get the USB connection working in MTP mode. In fact, I cannot get anything else working than charging mode.
Things I already tried :
- Enabling USB debugging
- 3 different cables (OP2, OP3, no brand)
- Manually choosing MTP mode in developper options
- 2 different computers
Maybe the most worrying thing is that the Windows device manager doesn't see any device when I connect the phone, not even a device with an error...
I'm really starting to think this is a hardware problem
Please, HELP ! :crying:

Isayaa said:
Hello everybody,
I received my OP3 yesterday and I'm quite happy with my phone, but I'm having an worrying problem with the USB connection. Indeed, I cannot seem to get the USB connection working in MTP mode. In fact, I cannot get anything else working than charging mode.
Things I already tried :
- Enabling USB debugging
- 3 different cables (OP2, OP3, no brand)
- Manually choosing MTP mode in developper options
- 2 different computers
Maybe the most worrying thing is that the Windows device manager doesn't see any device when I connect the phone, not even a device with an error...
I'm really starting to think this is a hardware problem
Please, HELP ! :crying:
Click to expand...
Click to collapse
I had the same issue with my MXP and still have it with my OP. Just can't seem to get my pc to recognize them as storage devices.
A workaround I have found is to boot into twrp, then their recognized immediately and can be used as an external storage device.

I also got 'charging only' mode when I first connected OP3 to my laptop but after changing the settings at developer options I could do the file transfers and all.
I hope some of your privacy setting isn't messing up with it because AFAIK it shouldn't be a hardware problem.

I have the same issue.
---------- Post added at 05:22 AM ---------- Previous post was at 05:15 AM ----------
bruciebabie1963 said:
I have the same issue.
Click to expand...
Click to collapse
I turned off usb debugging and now my computer recognizes my device.

numbere said:
I had the same issue with my MXP and still have it with my OP. Just can't seem to get my pc to recognize them as storage devices.
A workaround I have found is to boot into twrp, then their recognized immediately and can be used as an external storage device.
Click to expand...
Click to collapse
Thing is I cannot unlock bootloader and install TWRP because the USB connection is needed for that
Beside, this is a 2 days old phone, I'm expecting it to work flawlessly...

Isayaa said:
Hello everybody,
I received my OP3 yesterday and I'm quite happy with my phone, but I'm having an worrying problem with the USB connection. Indeed, I cannot seem to get the USB connection working in MTP mode. In fact, I cannot get anything else working than charging mode.
Things I already tried :
- Enabling USB debugging
- 3 different cables (OP2, OP3, no brand)
- Manually choosing MTP mode in developper options
- 2 different computers
Maybe the most worrying thing is that the Windows device manager doesn't see any device when I connect the phone, not even a device with an error...
I'm really starting to think this is a hardware problem
Please, HELP ! :crying:
Click to expand...
Click to collapse
When you connect the phone, Marshmallow by default connects in charging mode.
- Swipe down and you will see USB for charging "Touch for more options"
- Select 'File Transfers'
Transfer files.

white43 said:
When you connect the phone, Marshmallow by default connects in charging mode.
- Swipe down and you will see USB for charging "Touch for more options"
- Select 'File Transfers'
Transfer files.
Click to expand...
Click to collapse
I don't get the pop-up, the phone really does not detect that it's connected to a computer.

Isayaa said:
I don't get the pop-up, the phone really does not detect that it's connected to a computer.
Click to expand...
Click to collapse
That sounds like a hardware problem.
I don't have developer USB debugging mode on or anything.

I have this issue with my op3. Just got it in the post today. My windows 10 pc bleeps when pugged in but does not load a drive. In device manager it shows up as the d drive but not in file explorer. Annoying!

My windows 7 (company laptop) recognised my phone first time and installed the drivers no problem. I had problems with my USB flash drive earlier today until I discovered the hidden enable OTG toggle.
Sent from my ONEPLUS A3003 using Tapatalk

Isayaa said:
Hello everybody,
I received my OP3 yesterday and I'm quite happy with my phone, but I'm having an worrying problem with the USB connection. Indeed, I cannot seem to get the USB connection working in MTP mode. In fact, I cannot get anything else working than charging mode.
Things I already tried :
- Enabling USB debugging
- 3 different cables (OP2, OP3, no brand)
- Manually choosing MTP mode in developper options
- 2 different computers
Maybe the most worrying thing is that the Windows device manager doesn't see any device when I connect the phone, not even a device with an error...
I'm really starting to think this is a hardware problem
Please, HELP ! :crying:
Click to expand...
Click to collapse
I had the same problem.
What I did to fix it was the following steps:
- Disable USB debugging in developer options
- Choose PTP mode in developer options
- Choose MTP mode in developer options
- And Done, my PC now recognize the phone in MTP mode

what i do to fix this
- disable OEM unlocking
- disable developer options
- plug USB (wait for drivers install)
- enable developer options
- enable USB debuging

Gah, having similar problems!
Have tried all the workarounds suggested here, but whenever I plug it in on MTP mode it just shows me the OnePlus Drivers CD Drive.
I have installed the drivers (multiple times) but Windows 10 just won't see the phone when I plug it on MTP mode, just shows me the Drivers CD Drive every single time.
It's recognised as PTP no problems, but no luck on MTP!
Any ideas?
(Unlocked, not yet rooted, on stock firmware)

op3
Hi, i have the same problem, has anyone found any solution for this? It's starting to get pretty irritating... :/

Are you sure youre choosing file transfer mode from the notification area where by default its selected as charging only.

Try this
Hi Guys,
Try halfway inserting the USB cable into your PC, I was having the same frustrating problem and noticed that did the trick for me.
Still trying to figure out why the connectors are not responding when the USB cable is fully inserted, I admit that this is my first device using USB Type-C.

strange
The problem is not getting any better, i simply cannot get windows to even recognise my phone in device manager. Tried it in adb and fastboot, also tried a hard reset but no solution.. I requested a repair from oneplus because i think it cannot be anything else than a hardware problem.

guys i found solution on op3 forum... it worked 4 me with win 10 enterprise... download and install update from here... https://support.microsoft.com/en-us/kb/3099229

This worked fo me: (i'm using Win10)
Device manager, and find "MTP device" then driver update, find on computer, and select MTP USB Composit Device. It works with enabled Debugging, OEM unlock is on too. :good:

white43 said:
When you connect the phone, Marshmallow by default connects in charging mode.
- Swipe down and you will see USB for charging "Touch for more options"
- Select 'File Transfers'
Transfer files.
Click to expand...
Click to collapse
Solved my problem

Nexus 5X USB Device Not Working Please Help

Hello, whenever I plug in my Nexus 5X to my computer, it says that the USB device is not working properly. When I check my installed USB drivers it shows:
USB Device Not Recognized (Device Descriptor Request Failed)
Can someone help me? I would like to do USB Debugging

rpalmon said:
Hello, whenever I plug in my Nexus 5X to my computer, it says that the USB device is not working properly. When I check my installed USB drivers it shows:
USB Device Not Recognized (Device Descriptor Request Failed)
Can someone help me? I would like to do USB Debugging
Click to expand...
Click to collapse
If you are on win10 the builtin drivers and drivers you ask win10 to download are all you need. If you are on older platform like winxp or vista, try these:
http://forum.xda-developers.com/nexus-5x/general/psa-fix-adb-doesnt-winxp-t3403955

sfhub said:
If you are on win10 the builtin drivers and drivers you ask win10 to download are all you need. If you are on older platform like winxp or vista, try these:
http://forum.xda-developers.com/nexus-5x/general/psa-fix-adb-doesnt-winxp-t3403955
Click to expand...
Click to collapse
It was working before but now it says USB Device Not Recognized (Device Descriptor Request Failed) when I check the installed USB Drivers.

rpalmon said:
It was working before but now it says USB Device Not Recognized (Device Descriptor Request Failed) when I check the installed USB Drivers.
Click to expand...
Click to collapse
Try different cable and/or different port.

rpalmon said:
It was working before but now it says USB Device Not Recognized (Device Descriptor Request Failed) when I check the installed USB Drivers.
Click to expand...
Click to collapse
Is there a driver that I could install to fix it?

rpalmon said:
Is there a driver that I could install to fix it?
Click to expand...
Click to collapse
The error you listed doesn't sound like a software problem. It sounds like there is a USB communication issue.
Even with no drivers installed, your PC should be able to get the USB device descriptor, otherwise it couldn't figure out which driver to use.

sfhub said:
The error you listed doesn't sound like a software problem. It sounds like there is a USB communication issue.
Even with no drivers installed, your PC should be able to get the USB device descriptor, otherwise it couldn't figure out which driver to use.
Click to expand...
Click to collapse
The thing is that I have other Android devices and when I plug them in USB debugging works fine. I think that it has to do with the Android N update because ever since I updated it never worked.

rpalmon said:
The thing is that I have other Android devices and when I plug them in USB debugging works fine. I think that it has to do with the Android N update because ever since I updated it never worked.
Click to expand...
Click to collapse
It's possible or it could be coincidental. My Android N update didn't affect my USB operations or USB ID at all though.
It could also be something went bad with your USB port on the phone.
See if there is any lint inside the port using bright pencil flashlight.
Also try different USB A to C cable if that is what you are using, sometimes cables go bad.

sfhub said:
It's possible or it could be coincidental. My Android N update didn't affect my USB operations or USB ID at all though.
It could also be something went bad with your USB port on the phone.
See if there is any lint inside the port using bright pencil flashlight.
Also try different USB A to C cable if that is what you are using, sometimes cables go bad.
Click to expand...
Click to collapse
what do you mean by lint?

sfhub said:
It's possible or it could be coincidental. My Android N update didn't affect my USB operations or USB ID at all though.
It could also be something went bad with your USB port on the phone.
See if there is any lint inside the port using bright pencil flashlight.
Also try different USB A to C cable if that is what you are using, sometimes cables go bad.
Click to expand...
Click to collapse
I also tried factory resetting the phone and that didn't work.

rpalmon said:
what do you mean by lint?
Click to expand...
Click to collapse
Lint/dust. Sometimes it gets into the port and interferes with the connections.
Airblow sometimes helps.
Just a shot in the dark.

Pixel XL Fastboot Works to Flash Stock ROM+TWRP. Unseen as USB in TWRP or OS

I have 3 of these devices I'd successfully flashed TWRP to months ago. I can plug the other 2 into any of my Win10 PCs and they are functional as MTP devices in TWRP or the OS. Something is wrong with this device in that fastboot works fine, yet it is not recognized as a USB device at all in Windows. No device detected ding. No yellow exclamation point in device manager. Nothing in Nirsoft's USB DevView. I was unsure if this device received an OTA update so I went ahead and flashed the latest stock firmware as of 5/24/2017
It successfully flashed albeit unusually slow (even though Nirsoft USBDevView showed it connected at USB 2.0 and not 1.1). It also successfully flashed the latest Pixel XL Marlin-3.1.0-0RC2
Even if I attempt to toggle MTP in TWRP there is no response in Windows (on any of my PCs) nor is there any response when it's booted to Android 7.1.2. Same when toggled to PTP. Same w/ USB Debugging enabled. The device charges fine. Checking OTA updates shows none available. Factory reset option in bootloader didn't help.
I'm sure I'm missing something like I somehow have the incorrect firmware loaded for something. Anyone know what specifically is responsible for the USB at the firmware level that would allow it to function in fastboot mode yet fail to detect when booted TWRP or OS???

Pay_It_Forward_Pete said:
I have 3 of these devices I'd successfully flashed TWRP to months ago. I can plug the other 2 into any of my Win10 PCs and they are functional as MTP devices in TWRP or the OS. Something is wrong with this device in that fastboot works fine, yet it is not recognized as a USB device at all in Windows. No device detected ding. No yellow exclamation point in device manager. Nothing in Nirsoft's USB DevView. I was unsure if this device received an OTA update so I went ahead and flashed the latest stock firmware as of 5/24/2017
It successfully flashed albeit unusually slow (even though Nirsoft USBDevView showed it connected at USB 2.0 and not 1.1). It also successfully flashed the latest Pixel XL Marlin-3.1.0-0RC2
Even if I attempt to toggle MTP in TWRP there is no response in Windows (on any of my PCs) nor is there any response when it's booted to Android 7.1.2. Same when toggled to PTP. Same w/ USB Debugging enabled. The device charges fine. Checking OTA updates shows none available. Factory reset option in bootloader didn't help.
I'm sure I'm missing something like I somehow have the incorrect firmware loaded for something. Anyone know what specifically is responsible for the USB at the firmware level that would allow it to function in fastboot mode yet fail to detect when booted TWRP or OS???
Click to expand...
Click to collapse
When booted into the OS and plugged into PC, do you have a notification on the pixel that the device is connected and an option to change how to interact with the PC?

TheBobMiller said:
When booted into the OS and plugged into PC, do you have a notification on the pixel that the device is connected and an option to change how to interact with the PC?
Click to expand...
Click to collapse
I can plug it into the PC and charge it up and receive a full charged reached message in the notification bar. Unfortunately I do not receive any other acknowledgement in the notification bar that it's connect to the PC and to toggle from "charge only" to PC MTP connection like most other phones present.
Its not recognized as a USB device at all in Windows. No device detected ding. No yellow exclamation point in device manager. Nothing in Nirsoft's USB DevView.
Yet I can flash it successfully all day long in fastboot mode ... so strange.

Pay_It_Forward_Pete said:
I can plug it into the PC and charge it up and receive a full charged reached message in the notification bar. Unfortunately I do not receive any other acknowledgement in the notification bar that it's connect to the PC and to toggle from "charge only" to PC MTP connection like most other phones present.
Its not recognized as a USB device at all in Windows. No device detected ding. No yellow exclamation point in device manager. Nothing in Nirsoft's USB DevView.
Yet I can flash it successfully all day long in fastboot mode ... so strange.
Click to expand...
Click to collapse
What happens when you change the default USB Configuration in Developer Options to MTP or PTP and the plug in the phone to the computer?

TheBobMiller said:
What happens when you change the default USB Configuration in Developer Options to MTP or PTP and the plug in the phone to the computer?
Click to expand...
Click to collapse
No response on the phone or PC when set to MTP or PTP. Same w/ USB debugging off or enabled.

Pay_It_Forward_Pete said:
No response on the phone or PC when set to MTP or PTP. Same w/ USB debugging off or enabled.
Click to expand...
Click to collapse
I know this may seem like a stupid question, but have you tried using a different cable? If the phone recognizes fastboot mode commands but not PTP or MTP, then perhaps the cable is going bad. I would blame it on your drivers but fastboot mode wouldn't work if the drivers were malfunctioning.

TheBobMiller said:
I know this may seem like a stupid question, but have you tried using a different cable? If the phone recognizes fastboot mode commands but not PTP or MTP, then perhaps the cable is going bad. I would blame it on your drivers but fastboot mode wouldn't work if the drivers were malfunctioning.
Click to expand...
Click to collapse
Same behavior with a different cable. I've also tested on USB 2.0 and USB 3.0 ports. Also different PCs. Up until today I couldn't get Windows to acknowledge anything. Today I observed Windows a couple times present "usb device not recognized. the last usb device you connected to this computer malfunctioned and windows does not recognize it."
However even after it did that once on one PC today and again on another PC today, I couldn't get Windows to present that message any subsequent times. Even when that message did appear as a system tray notification in Windows, Windows still wasn't showing the phone with a yellow exclamation point in device manager like it sometimes can for many other devices it would otherwise present such a message for. (I just speak from past experience with older PCs)

Pay_It_Forward_Pete said:
Same behavior with a different cable. I've also tested on USB 2.0 and USB 3.0 ports. Also different PCs. Up until today I couldn't get Windows to acknowledge anything. Today I observed Windows a couple times present "usb device not recognized. the last usb device you connected to this computer malfunctioned and windows does not recognize it."
However even after it did that once on one PC today and again on another PC today, I couldn't get Windows to present that message any subsequent times. Even when that message did appear as a system tray notification in Windows, Windows still wasn't showing the phone with a yellow exclamation point in device manager like it sometimes can for many other devices it would otherwise present such a message for. (I just speak from past experience with older PCs)
Click to expand...
Click to collapse
Wow...that's puzzling then. You said in your op that you factory reset using bootloader menu but have you tried flashing factory image with fastboot in bootloader? Maybe the firmware that's malfunctioning could be fixed with a factory image flash...

TheBobMiller said:
Wow...that's puzzling then. You said in your op that you factory reset using bootloader menu but have you tried flashing factory image with fastboot in bootloader? Maybe the firmware that's malfunctioning could be fixed with a factory image flash...
Click to expand...
Click to collapse
That's what's killing me. I can successfully factory image flash (same I've flashed on the other handsets). Yet the USB doesn't work in the OS. When this initially happened I thought for sure USB was going to work like usual in TWRP (works on the others) but it doesn't work there either.
The only other thing I can think of out of desperation is flash Pure Nexus ROM or Resurrection remix in the hopes that somehow affects a USB bit setting at the firmware level. (Mind you flashing factory nor TWRP helped).
My exotic theory is that fastboot driver has an ability to work in USB 1 mode and TWRP or OS level driver can only work in USB 2.0/3.0 mode. Even though I don't see any visual defects to the pinout on this handset I'm guessing my pins for charging and for USB 1 mode is fine whereas my pins for USB 2.0/3.0 are electrically damaged or something.

Pay_It_Forward_Pete said:
That's what's killing me. I can successfully factory image flash (same I've flashed on the other handsets). Yet the USB doesn't work in the OS. When this initially happened I thought for sure USB was going to work like usual in TWRP (works on the others) but it doesn't work there either.
The only other thing I can think of out of desperation is flash Pure Nexus ROM or Resurrection remix in the hopes that somehow affects a USB bit setting at the firmware level. (Mind you flashing factory nor TWRP helped).
My exotic theory is that fastboot driver has an ability to work in USB 1 mode and TWRP or OS level driver can only work in USB 2.0/3.0 mode. Even though I don't see any visual defects to the pinout on this handset I'm guessing my pins for charging and for USB 1 mode is fine whereas my pins for USB 2.0/3.0 are electrically damaged or something.
Click to expand...
Click to collapse
Well i guess you could try some ROM flashing and see if that works and if not, try contacting Google and see if they will honor a warranty or something. Good luck to ya!

TheBobMiller said:
Well i guess you could try some ROM flashing and see if that works and if not, try contacting Google and see if they will honor a warranty or something. Good luck to ya!
Click to expand...
Click to collapse
@TheBobMiller I appreciate all your thoughtful suggestions and well wishes. Have an awesome weekend!

Question Phone not connecting via USB

My first Poco F3 is completely unlocked and running a custom rom, still able to connect to PC even now.
I have a second Poco F3 that I was able to originally connect to my PC to debloat, hadn't needed to connect it to a PC till now. Today was the day I could unlock it but when I connect it via USB cable, original or otherwise, no usb options appear on phone and nothing shows on PC. I can use the same cable on my first Poco F3 and everything works fine. I've tried multiple cables, reinstalling drivers, restarting phone and PC, trying a different PC, enabling debugging tools, etc.
Nothing shows in "My Computer"
Nothing shows in Device Manager
No usb options on phone (default is set to File Transfer)
Nothing shows in CMD with "adb devices"
Charging still works
Is there anything I can do to at the very least unlock the bootloader? Or is this not fixable?

long shot... check the usb C port for dirt/dust/fluff blocking connection...

Most probably u debloated an app responsable for media transfer. If u can, revert what u debloated.

Alin45 said:
Most probably u debloated an app responsable for media transfer. If u can, revert what u debloated.
Click to expand...
Click to collapse
Did a factory reset thinking that may have been the case, still no good.
Tried cleaning out the port and still no good either

I still think it's Windows. Please can you try putting Ubuntu (or another Linux distro) on a USB, booting from that, installing platform tools (ADB/fastboot etc) and then running ADB devices. Windows is very finiky sometimes.
Edit: when you plug in your phone to the PC do you get a notification saying charging? Or is there no notification? Also does it start charging the phone?

There is a delay before it begins charging and the charging animation plays but yes it does. But then there is no usb notification. Will try ubuntu and report back

Booting into Ubuntu, before installing platform tools the first phone that I knew worked showed up and showed up in adb devices when platform tools was used. The second still didn't show up, exactly the same as on windows

Try downloading the installed stock miui rom from the update menu in the miui update menu and re-install it on the phone

Unfortunately reinstalling latest package didn't help

Can't think of anything else to suggest. Sorry

If the usb connection continues to be nonexistent, is there any way to at least unlock the bootloader without using the Xiaomi Unlock tool on the PC?

Are you sure the USB cable you're using support transfert file?

Cjayy said:
If the usb connection continues to be nonexistent, is there any way to at least unlock the bootloader without using the Xiaomi Unlock tool on the PC?
Click to expand...
Click to collapse
Nope

Hmmmmm.....strange! I'm running out of ideas....try different USB ports on PC. Maybe it's a faulty USB-C port on phone after all.

do you have a type c usb-otg?
If yes then see if it is detected by the phone

X0PIRAT3 said:
Are you sure the USB cable you're using support transfert file?
Click to expand...
Click to collapse
Yes. Used 4 different cables, 1 of which is the cable that comes with the phone. None work on this phone but do on the first phone.
Alin45 said:
Hmmmmm.....strange! I'm running out of ideas....try different USB ports on PC. Maybe it's a faulty USB-C port on phone after all.
Click to expand...
Click to collapse
Tried different ports across 2 PCs. I'm starting to think it is a faulty port, though it worked fine a week ago.
arifqur said:
do you have a type c usb-otg?
If yes then see if it is detected by the phone
Click to expand...
Click to collapse
I honestly don't know if any of my cables are usb-otg, how would I check?

Try to use this version of Mi FLash Tool (only for drivers) : https://xiaomiflashtool.com/download/xiaomi-flash-tool-20210226
Extract and launch the executable then drivers install

Something like this. You can plug in any usb stick and see if it is detected. Another way to check whether the port on the phone is working for data as well

X0PIRAT3 said:
Try to use this version of Mi FLash Tool (only for drivers) : https://xiaomiflashtool.com/download/xiaomi-flash-tool-20210226
Extract and launch the executable then drivers install
Click to expand...
Click to collapse
Tried this and still no good.
arifqur said:
Something like this. You can plug in any usb stick and see if it is detected. Another way to check whether the port on the phone is working for data as well
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I don't have anything like this but that reminded me of the usb-c to headphone adapter and that also doesn't work. Sound just plays out of the speakers.
Trying with Android Auto in the car, the car doesn't register a device connecting at all either.
Either the data transfer portion is somehow disabled on the device itself (which I would love to know how to enable it again if that's the case) or it's a damaged usb port. Just strange that it worked a week ago.
Something I forgot to mention, when I went to unlock the bootloader yesterday the phone did not show up anywhere except for in the ADBFastbootTools to debloat the software as a OnePlus device but then never showed up again.

Cjayy said:
Tried this and still no good.
I don't have anything like this but that reminded me of the usb-c to headphone adapter and that also doesn't work. Sound just plays out of the speakers.
Trying with Android Auto in the car, the car doesn't register a device connecting at all either.
Either the data transfer portion is somehow disabled on the device itself (which I would love to know how to enable it again if that's the case) or it's a damaged usb port. Just strange that it worked a week ago.
Something I forgot to mention, when I went to unlock the bootloader yesterday the phone did not show up anywhere except for in the ADBFastbootTools to debloat the software as a OnePlus device but then never showed up again.
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Click to collapse
I have the same problem, did you solve it ? I replaced the usb board of the phone, still not working.