mi9 - Unknown USB Device (Device Descriptor Request Failed) - Xiaomi Mi 9 Questions & Answers

hey guys. first i'' say that i own mi9, works great - connecting to my pc and laptop, adb, and fastboot devices works excellent .
NOW - to the problem.
my friend gave me his mi9, totally stock, miui12 global. to backup his internal card and wipe clean and flash eu rom with root.
easy job i said.... hmmm..is it ??
when connecting the mi9 to my pc (tries several cables, originals, blitzwolf, front socket, rear socket, laptop) nothing..
tried to uninstall the driver and manually install,
tries enabling usb debugging and connect it via adb.. nothing (waiting for device)
same goes in bootloader.
what the hell ?? lol..
any one have any ideas ??
thanks!

Same issue. Stuck in TWRP...what to do?

Related

Killed my Tytn 2 ?

Hi guys, i have probably killed my beloved kaiser.
This is what i did:
- Flashed latest Hyperdragon III Rom - all worked fine here
- Sometime later i figured out that the phone was not able to connect to my PC anymore (tried different computer and cable, no change: unknown usb device)
- I then entered boot loader and tried to flash an older rom (Garmin DK 3) but it stopped at 16% and i had to enter boot loader again.
The result:
Now no pc is detecting the tytn 2 correctly (unkown usb device) on boot loader screen. I guess that the usb port on the phone is somehow damaged. Any suggestions ?
http://wiki.xda-developers.com/index.php?pagename=Kaiser_Stuck_at_bootloader
there u go
I just want to say that your phone not connecting was a simple thing.
Moved to apropos section.
tabaz said:
- Sometime later i figured out that the phone was not able to connect to my PC anymore (tried different computer and cable, no change: unknown usb device)
Click to expand...
Click to collapse
Did you try deleting your sync settings?
Delete device from sync list.
unplug/replug usb. setup device again.
Or I have also had to un & re install Active-sync.
Hope this helps
nonono .. its not that active sync is not working anymore, its that windows detects the device either as unknown device (on bootloader screen!) or does not detect it at all. I even cant select USB in mtty.exe - active sync disabled. Iam pretty much sure its an usb port issue since my tytn2 have had always problem with usb cons (did not recharge and stuff). Before that issue my pc had detected the tytn2 in bootloader screen.
tabaz said:
nonono .. its not that active sync is not working anymore, its that windows detects the device either as unknown device (on bootloader screen!) or does not detect it at all. I even cant select USB in mtty.exe - active sync disabled. Iam pretty much sure its an usb port issue since my tytn2 have had always problem with usb cons (did not recharge and stuff). Before that issue my pc had detected the tytn2 in bootloader screen.
Click to expand...
Click to collapse
Try another USB cable. I have a faulty cable at work and my phone disconnects from AS all the time. At home, no problems
Dave
i have tried several usb cable on several computer - same problem.
tabaz said:
i have tried several usb cable on several computer - same problem.
Click to expand...
Click to collapse
Oh well, it worth a shot.
Dave

[Q] Not able to connect to PC using USB cable

Hi all,
Please help me.
when i connect my LG P970 using USB cable to laptop, its not detecting.
I installed drivers many times. I restarted pc, phone many times, even i formatted(reset my phone to factory settings).
Noting is working.
I wanna root my mobile, but without connecting to pc via USB its not possible. ( itried Ginger break also, not working).
Thanks in advance.
musicking said:
Hi all,
Please help me.
when i connect my LG P970 using USB cable to laptop, its not detecting.
I installed drivers many times. I restarted pc, phone many times, even i formatted(reset my phone to factory settings).
Noting is working.
I wanna root my mobile, but without connecting to pc via USB its not possible. ( itried Ginger break also, not working).
Thanks in advance.
Click to expand...
Click to collapse
Make sure the cable is properly connected. Check for dust that might prevent it going in properly. Try a different cable. What OS are you using? I found where bootloader is dmg or incomplete Windows fails to detect it. Linux on the other hand detects it. Can't use it but you can detect it.
Can you connect to SW Update Mode? Battery out and plug into PC while holding vol up button.
If nothing works try taking it into the shop.
Sent From Optimus Black
xonar_ said:
Make sure the cable is properly connected. Check for dust that might prevent it going in properly. Try a different cable. What OS are you using? I found where bootloader is dmg or incomplete Windows fails to detect it. Linux on the other hand detects it. Can't use it but you can detect it.
Can you connect to SW Update Mode? Battery out and plug into PC while holding vol up button.
If nothing works try taking it into the shop.
Sent From Optimus Black
Click to expand...
Click to collapse
I connected it properly. Tried with different cable too.
Windows 7
I can connect to SW Update mode
musicking said:
I connected it properly. Tried with different cable too.
Windows 7
I can connect to SW Update mode
Click to expand...
Click to collapse
You can root your phone from there. If you have SW Update. I recommend taking it into the shop if you are still under warranty, If you don't have warranty then you can go ahead and root. Just install a patched bin and fls with Smart Flash Tool. It's one of the stickies (How to unbrick, I think)
hi
new to Android nation
I have the same issue when connecting to USB...
And I managed to flash with custom firmware (latest ZEUS version) and I rooted but the issue with USB connection is still there...
Anyway, I wiil try connecting it to Linux to check if that would work with USB connecting
UPDATE:
OK after some digging, I managed to (at least temporally) solve the issue... After fresh installing official 2.3.4 firmware I booted to recovery and from there formatted the system folder and then installed Zeus v7 firmware... anyway, USB connection and charging indicator work fine at first booting to system... As soon as I reboot the OS USB connection (and charging) get unstable, and after third reboot it completely goes away and the device does not recognize anything: if I connect USB cable it does not show any sing (charging indicator does not show battery charging, nor the device offers me to connect in mass storage, windows recognizes only modem but not the USB storage) and when I connect charger, battery indicator does not flash as charging... Battery monitor tool shows that "battery is discharging" even though the battery capacity seems to increase (according to growing percentage of battery capacity)... Is there a some kind of USB server... I am a total noob to Androiid OS (used to be Symibian from its beggining )so I hope you won`t mind if I used wrong terms in my explanation/comment...
I hope my explanation is not confusing
Cheers
UPDATE 2:
After installing Zeus v7.01 update, battery charging recognition got fixed using both USB cable and wall charger...
Anyway, USB recognition by PC problem still exists... But when in recovery mode I can successfully mount SD card to PC in Mass storage mode...
Will keep you updated... :victory:

Fastboot mode not detected + MTP mode not detected

Hello,
since 2 days my MI5 is not working fine. I can plug it to the energy and charges, but when I connect it to the PC via ADB or fastboot, is not recognized, but charges.
is it possible that the usb-connector is damaged? It looks like the mobile doesn't recognize when is connected to a computer and always is on charge mode. Any ideas how can I check it?
I installed the MIUI USB Settings (https://play.google.com/store/apps/details?id=co.vincze.usbsettings&hl=es_419) and I get the message that I need to plug my mobile to the computer.
I tried with several usb - cables, and also with different computers.
I restart the mobile in fastboot mode and is not detected too, just charges.
thanks for ur help
Anyway what rom and version you're using it..?
Using original cable..?, and already check it that usb connected as MTP not just for charging in developer option..?
Did you already install all driver needed for adb and fastboot interface..i mean driver included while installing miflash tool?, also checking it under pc device manager to check that's already connect with correct driver
JJeamy said:
Anyway what rom and version you're using it..?
Using original cable..?, and already check it that usb connected as MTP not just for charging in developer option..?
Did you already install all driver needed for adb and fastboot interface..i mean driver included while installing miflash tool?, also checking it under pc device manager to check that's already connect with correct driver
Click to expand...
Click to collapse
last developer rom: MIUI 8 Global 7.1.19 | Beta
original cable + other cable.
driver installed correctly (in 3 computers) - The phone was always recognized in the 3 computers, and now is never recognized.
In pc device manager nothing is displayed.
In developer options MTP enabled.
And always is charging.
Restarting in fastboot mode, connected to computer, and also only charges, is not recognized. Is is possible that the usb-port is damaged?
ivanrsz said:
last developer rom: MIUI 8 Global 7.1.19 | Beta
original cable + other cable.
driver installed correctly (in 3 computers) - The phone was always recognized in the 3 computers, and now is never recognized.
In pc device manager nothing is displayed.
In developer options MTP enabled.
And always is charging.
Restarting in fastboot mode, connected to computer, and also only charges, is not recognized. Is is possible that the usb-port is damaged?
Click to expand...
Click to collapse
Really weird..but it's possible your usb port of your phone already broken..
Anyway how do you get using 7.1.19 beta rom..?, from updating or fresh flashing from twrp with already unlocked bootloader..?
If from twrp..how about connecting while in twrp..?, did your pc recognized it..?
JJeamy said:
Really weird..but it's possible your usb port of your phone already broken..
Anyway how do you get using 7.1.19 beta rom..?, from updating or fresh flashing from twrp with already unlocked bootloader..?
If from twrp..how about connecting while in twrp..?, did your pc recognized it..?
Click to expand...
Click to collapse
unlooking bootloader and installing twrp. after I get the updates directly from xiaomi...
ivanrsz said:
Hello,
since 2 days my MI5 is not working fine. I can plug it to the energy and charges, but when I connect it to the PC via ADB or fastboot, is not recognized, but charges.
is it possible that the usb-connector is damaged? It looks like the mobile doesn't recognize when is connected to a computer and always is on charge mode. Any ideas how can I check it?
I installed the MIUI USB Settings (https://play.google.com/store/apps/details?id=co.vincze.usbsettings&hl=es_419) and I get the message that I need to plug my mobile to the computer.
I tried with several usb - cables, and also with different computers.
I restart the mobile in fastboot mode and is not detected too, just charges.
thanks for ur help
Click to expand...
Click to collapse
Same problem here, from 3 or 4 days
Any solution to solve, please?
And neither twrp i can install

[SOLVED] Oneplus 2 Bootloop | USB not working

Hello guys,
Recently I bricked my Oneplus 2 by trying to flash a custom Kernel. That would all be no problem, however my PC doesn't recognize my phone. Tried multiple USB ports (multiple PCs) and got the official oneplus drivers installed, still no connection (tested on Windows and Linux) . That got me believing that my USB port was broken (charging still working), so I replaced the USB module however still not working. (Could it be the cable?)
The current state is that I can boot into recovery (TWRP) and fastboot, however trying to boot normally just shows me the android logo forever.
So well my questions are:
1. What could possible be broken at my phone, that the USB connection is not working. (It worked before)
2. Is there any way to push a rom towards my phone without using a USB connection? So without adb?
Thanks a lot in advance!
EDIT: It was the cable ... I think the data pin broke somehow ... and me stupid as a was replaced the USB module 2 times ... Well transferring CarbonOS right now and will flash real so so thread closed!

HELP ! A8+ not detected by computer

Hello, so for quite some time my A8+ (2018) wasn't detected by my computer, it wasn't bothering me as i didn't really care about it, but now that i need to flash a stock rom into it again, i need USB access so that ODIN can detect it in download mode, so to sum things up:
- My phone is rooted.
- No it doesn't get detected in other computers.
- The cable isn't the cause as i tested the same cable in my S10+ and it works, tested the S10+ cable and it doesn't work on my A8+.
- The phone is being charged by the USB to PC connection, yet it's not detected by neither device manager(Samsung's android drivers are installed) or any android software (kies, adb...).
- In Dev Tools i can only change it to MTP or PTP, neither gets detected, *#0808# is already set to MTP + ADB, rebooted many times to no avail.
I could really use any suggestion, i have TWRP installed if that can help me with anything, a full phone Wipe using TWRP has been done, nothing changed.
Thank you so much in advance.

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