Develop Bugs

Can't get USB connection to upgrade again

Hi all,
I have this particularily annoying problem that effects my ability to upgrade the rom files on my universal sometimes.
When I put my device into boot mode I don't see USB v1 or even Serial v1, what I get is Serial v2.01
Sometimes when I then connect the USB cable into the universal this changes to USB v2.01 and windows recognises the device and I can perform the rom upgrade. Most of the time however, it stays at Serial v2.01 and windows complains about 'USB Device Not Unrecognized'.
I have tried 2 different USB cables with the same outcome.
Normally after trying s few dozen times I eventually get windows to recognise the universal and perform the upgrade but I have been stuck like this for 3 days now and am getting close to my breaking point which will could shortly result in a broken universal.
Please help.

i cant quite remember the ins and outs but i have faced this problem as well
firstly ensure your connected directly to the computer and not via a hub,
try to do the upgrade if/when you get the message remove the device from the cable and do a soft reset
try the upgrade again and it should be successful this time .
i have had lots of trouble myself with this and i have found a soft reset always gets me there in the end.
goodluck !

I have just retried the upgrade and the display keep changing from USB to Serial about every 10 seconds.
I also noticed that the mouse kept freezing on the screen for a few seconds whilst this was happening. I tried using my other USB cable and the same thing was happening.
Does anyone else have v2.01 displayed on their screen like me?

Update: I stupidly ran Ivan's AKU3.2 upgrade utility whilst the universal was activesynced to my desktop (not in bootloader mode) and now this has executed the EnterBL.exe program which traps you in the booloader unless you upgrade a rom (or use mtty to issue the correct command to escape).
Unfortunately I can't excape via either of these methods as I still can't obtain a USB connection.
I have even tried a different PC but am still stuck.
Maybe both of my USB cables are knackered, so I will obtain another one and try that. If that fails it looks like Orange will be recieving a little parcel from me...

I have now also tried a 3rd USB cable with the same result.

I have a similar problem, I'm stuck in bootloader mode.
I have version 0.60 and if I put a USB in it keeps on saying serial and my computer says he doesn't recognise the device.
I've tried it on 2 different computers as on my new one apparantely all my usb ports are part of a hub. (they come up as all, inluding the ones in my moniter, being part of an usb root hub) But no succes on my other computer either.
I'm thinking that my only option is to do it via a memory card? Can anyone tell me how I'd go about that as I have no clue :shock:
Thanks!
Tim

Success!
I have been plugging in and unplugging my phone all day (with it still stuck in boot mode) and eventually it was recongised by my PC - I then upgraded the radio stack & ce rom and I am up and running again (I know that I could have used buzz's utility but I wanted to upgrade anyway).
The only thing that I did slightly differently this time was that I actually removed the battery from the univeral for a while and then plugged it back in before trying the USB connection. I did try this once of twice before without success though so can't really draw any conclusions apart from I don't know what is going on.

UNIVERSAL in Boatloader mode not recognized by PC-USB

I tried to upgrade my rom but the process crashed. The utility mtty doesn't work because when I connect the universal, boatloader mode by the cable, to the pc, it says "USB not recognized" (sometimes when I connect the computer is frozen till I disconnect the cable of the universal)
Please, I tried to have some solutions in the forum but all the posts indicates is needed previously the usb connection.
Do you know if should be possible to run the flash of the rom in other way, for example using a serial cable connected into the miniusb of the universal, because the boatloader screen says "Serie, v.1.01"
I apprecite what you can say please, I'm really in a hole.

Try this...
Try taking out the battery for a few minutes (10-30mins) and reboot your PC then repeat upgrade process. Hope that helps. Good luck!!!

I have the same problem on my PC at work, it's caused by a poor USB chipset in the PC, or trying to connect through a USB hub.
The only thing I found that worked was to try a different PC, then it was fine...

sl9 said:
I have the same problem on my PC at work, it's caused by a poor USB chipset in the PC, or trying to connect through a USB hub.
The only thing I found that worked was to try a different PC, then it was fine...
Click to expand...
Click to collapse
In my case it still happening in other computers. Conclussion: some piece of the software in the universal has been lost. The screen shows "Serial" that means on some way that is opened to comunication but not USB.
My questions are:
- should be possible to put some starting software in SD and do the universal boot on it.
- do you know how to connect to the computer COM! port from the usb miniport of the Universal.
I appreciate, I was not planning to replace now the Universal...

beginner said:
sl9 said:
I have the same problem on my PC at work, it's caused by a poor USB chipset in the PC, or trying to connect through a USB hub.
Now works.... I still thinking windows is so stupid software made for distroy our mind ....
Solved after install drivers for a converter usb -rs232 ( I was looking for the way to connect from rs232 the universal)
I'm happy again and I promise don't try to change rom again (at least for a while)
If some person is interested in what brand of software/hardware I installed, send me a mail...
Thanks hearing me ...
Click to expand...
Click to collapse
Click to expand...
Click to collapse

i have the same problem with my friend's uni
does it mean that you don't have to own any adapter, just have to install drivers for USB to RS232 adapter
if yes, where to find it?
thanx
respectfully
ZeD

zedino said:
i have the same problem with my friend's uni
does it mean that you don't have to own any adapter, just have to install drivers for USB to RS232 adapter
if yes, where to find it?
thanx
respectfully
ZeD
Click to expand...
Click to collapse
I want to say that is running after doing some things and obviously some of it solved my problems. I made:
- unistall last version of activesync and go back to version 4.0
- delete all the applications using ports usb.
due the connection still not running (windows message: device not recognized) and because in the screen of universal I saw: "COMM1" I tried to connect from computer port rs232. By that I purchased some special cable, name: hama brand, rs232 serial, 9 pin - usb.
As you can imagine all the steps I followed were followed by the typical restart of windows. In this sense is important to say that the universal, after connect, need to do a soft reset each time (again windows....)
Other comment is that I unmark the option to connect by usb in activesync and mark the connection by com1.
and after all was done, connecting by usb the unniversal, kill wcescomm, windows said "NEw usb device, sync device". I started mtty and now appears the USB option, great! same time the screen in universal changed from comm1 to usb, more great....
and that's all.

does it mean you solve your problem using special USB 2 RS232 connector?
ZeD
PS: it was my first idea , but i still believe i can solve the problem using USB port

zedino said:
does it mean you solve your problem using special USB 2 RS232 connector?
ZeD
PS: it was my first idea , but i still believe i can solve the problem using USB port
Click to expand...
Click to collapse
I think my english wording was not fine. I mean I solved my problem after install the sofware -drivers- of the rs232 connector, but connecting to the universal by usb as on standard way I was syncronizing previous the crack with activesync.

OK, where to get this driver?
thanx

?????????? NOTHING ?????????????

zedino said:
OK, where to get this driver?
thanx
Click to expand...
Click to collapse
Try here.
http://www.hama.de/portal/type*3/action*1026/searchMode*1/q*039703

I have had the same problem several times now (search the forum for the thread).
I tried three different PC's/laptops and three different USB cables all with the same error as yourself.
Eventually I got a connection but the laborious process of trying - failing, restarting windows and soft resetting the phone, trying - failing........... until it finally worked. I did nothing differently the time that it worked but the strange thing is that it has worked every time since! Maybe the USB driver the phone has a bug in it that causes it to get 'stuck' in a mode where it will no longer correctly operate but once you have managed to 'kick' it into action it seems toi then carry on working.
It was also a ROM upgrade that caused my USB phone driver to stop functioning. Maybe the fact that the phone has a slightly diffferent software configuration after the upgrade but exactly the same hardware fingerprint causes the driver to fail.
Every time that I have had this problem it is after an upgrade but once I have gotten it to work once with the new ROM, it always continues to function - until the next upgrade.

shrubbery said:
I have had the same problem several times now (search the forum for the thread).
I tried three different PC's/laptops and three different USB cables all with the same error as yourself.
Eventually I got a connection but the laborious process of trying - failing, restarting windows and soft resetting the phone, trying - failing........... until it finally worked. I did nothing differently the time that it worked but the strange thing is that it has worked every time since! Maybe the USB driver the phone has a bug in it that causes it to get 'stuck' in a mode where it will no longer correctly operate but once you have managed to 'kick' it into action it seems toi then carry on working.
It was also a ROM upgrade that caused my USB phone driver to stop functioning. Maybe the fact that the phone has a slightly diffferent software configuration after the upgrade but exactly the same hardware fingerprint causes the driver to fail.
Every time that I have had this problem it is after an upgrade but once I have gotten it to work once with the new ROM, it always continues to function - until the next upgrade.
Click to expand...
Click to collapse
not works, probably is this device lost forever, i have restarted device and PC almost hundred times, still the same result, uni stuck in Bootloader screen top of page "Serial" bottom of page "v1.00"
nothing changed, even if i connect to USB port
if someone have some solution to this s*it pls let me know
thanx

i have had the same. my device wast recognized by my pc, bur i used maupgradeno_id and installed a other rom, even installed the original rom from qtek (latest) then after i was finished it started then i tried the other rom and it was working. ( pc did see a unknown device ) hope you have the same and its working also.
good luck

mrijnvis said:
i have had the same. my device wast recognized by my pc, bur i used maupgradeno_id and installed a other rom, even installed the original rom from qtek (latest) then after i was finished it started then i tried the other rom and it was working. ( pc did see a unknown device ) hope you have the same and its working also.
good luck
Click to expand...
Click to collapse
no, my problem persist, hundred times i tried to recover friends device using upgrade by original shipped ROM but the device is not recognized by system so there is allways connection error, so this kind of reliving this UNI is not usable
anyway, thanx for raply and suggestion
ZeD

mrijnvis said:
i have had the same. my device wast recognized by my pc, bur i used maupgradeno_id and installed a other rom, even installed the original rom from qtek (latest) then after i was finished it started then i tried the other rom and it was working. ( pc did see a unknown device ) hope you have the same and its working also.
good luck
Click to expand...
Click to collapse
If you're stuck in bootloader mode only, visit www.buzzdev.netand look for ExitBootloader utility written by the great Buzz. Just follow his instructions or scroll thru' Universal's forum here and there for problems relating to "stuck in bootloader"
hope this helps

no device is not recognized by PC so any trying to use exitbl is not available, anyway this option was one of the first what i have tried
thanx anyway
ZeD

i had the same problem with the QTEK of my principal after I upgraded his ROMs.
(after the hard reset, the pocket remained in bootloader mode).
you can solve this problem in a very simple way:
you have to launch the bootloader installation (BL1.01_RUU_UNI_V.1.2.EXE) from the PC (still connected with the PPC through USB) while the PPC is in bootloader mode (on your display you see "USB > Serial 1.01" or something like that).
then you do a SOFT reset and the pocket boot normally.
very simple.
i hope to be helpful to someone.

zedino said:
no device is not recognized by PC so any trying to use exitbl is not available, anyway this option was one of the first what i have tried
thanx anyway
ZeD
Click to expand...
Click to collapse
I had some problem. After uninstall all usb applications in the pc and install the software for cable usb -rs 232, doing some softreset in the pda connected, it turned the screen message "Com" by "Usb"

Cannot connect to PC after ROMupdate

I hard-SPLled my device and unpreded ROM Miri v3.0 on it. After the upgrade the device could not connect to my PC via ActiveSync or Mobile Center.
I tried with several PCs, laptops and many cables.
It should be 'soft'ware, since the problem started after ROM upgrade.
So, I figured it was because of the ROM, so downgraded to official 6.1 ROM, but connecting is still not possible. The official ROM included bootloader, radio and OS, btw.
Now I am stuck with a device that cannot connect to any PC! I always get a message of an unknown device that connects, later on followed by a message of an unknown USB device.
And yes, tried to remove the speed-up of ActiveSync. Also tried as USB storage, but I get the unknown USB device all the time...
Please help, I don't know what to try now!

Try a different USB cable. Might be a good idea to buy a brand new one. They tend to go corrupt easily.

Bright.Light said:
I hard-SPLled my device and unpreded ROM Miri v3.0 on it. After the upgrade the device could not connect to my PC via ActiveSync or Mobile Center.
I tried with several PCs, laptops and many cables.
It should be 'soft'ware, since the problem started after ROM upgrade.
So, I figured it was because of the ROM, so downgraded to official 6.1 ROM, but connecting is still not possible. The official ROM included bootloader, radio and OS, btw.
Now I am stuck with a device that cannot connect to any PC! I always get a message of an unknown device that connects, later on followed by a message of an unknown USB device.
And yes, tried to remove the speed-up of ActiveSync. Also tried as USB storage, but I get the unknown USB device all the time...
Please help, I don't know what to try now!
Click to expand...
Click to collapse
Have you tried using a differant usb port? I had to do that with a miri rom on my "old" Blackstone. I did have trouble with miri roms doing that on my Touch HD,for some strange reason.
You could also go to the threads in that forum and read what people have done to remedy that problem on the HD, as it should also work on our Tilt 2.
Later..............

Bright.Light said:
I hard-SPLled my device and unpreded ROM Miri v3.0 on it. After the upgrade the device could not connect to my PC via ActiveSync or Mobile Center.
I tried with several PCs, laptops and many cables.
It should be 'soft'ware, since the problem started after ROM upgrade.
So, I figured it was because of the ROM, so downgraded to official 6.1 ROM, but connecting is still not possible. The official ROM included bootloader, radio and OS, btw.
Now I am stuck with a device that cannot connect to any PC! I always get a message of an unknown device that connects, later on followed by a message of an unknown USB device.
And yes, tried to remove the speed-up of ActiveSync. Also tried as USB storage, but I get the unknown USB device all the time...
Please help, I don't know what to try now!
Click to expand...
Click to collapse
try rebooting your pc, also try a different usb port on your comptuer and then try another usb cable. i have read somewere that some computers do not put out enough voltage on the usb ports, so this said, after you try the previous suggestions grab your cable and try another computer, after you install activesynce of course .

Thanks for thinking with me!
I tried several PCs, so, yes, different USB ports.
Also tried several cables that proved to be ok with other devices, including one ExtUSB cable.
Of cause resetted PCs before connecting and first installing ActiveSync or Windows Mobile Center (depending on OS: WinXP or Vista)
When connecting to USB connections that worked before now sometimes the Touch tells me there is insufficient power... That's strange too! It would mean the device needs more than 500mA in some cases (because it's the only device connection to the USB) - but this is on more USB ports of different computers!
So I tried everything qua hardware... Don't know what to do now.

Bright.Light said:
Thanks for thinking with me!
So I tried everything qua hardware... Don't know what to do now.
Click to expand...
Click to collapse
Have you considered -- or tried -- flashing to a different ROM via the sd-card method? The method where you put the RHODIMG.nbh file in the root of your sd card (by removing card and using a card reader attached to PC), then put the TP2 in bootloader and it flashes the new ROM from the sd card...something like that?
I probably didn't describe this quite right -- I haven't done it myself -- but lots of people prefer this rom-flashing method. Find/check-out the procedure elsewhere on this forum.
If it works then maybe you'd get away from the problem-rom...if the rom is really the problem.

[Q] Desire HD not recognized on PC anymore

Hello, XDA-Experts!
I encounter a problem with my desire HD and looking for any help I can get.
Since about one week my Phone is not recognized when connected to a PC.
I am using the phone since December 2010 and it works well since then. It's S-Off and Radio S-Off. In the moment, I am using CoreDroid 4.9 with Radio 26.06.04.06_M. Before I was using the ARHD ROM for some time.
The problem occurs on 3 different PC's with 3 different operating systems (Server 2003, Win 7 Ultimate 64-Bit, Win XP Pro SP3, all of them used to recognize the phone before). Windows never recognizes the phone now, android (in most cases) recognizes the connection an asks for the connection mode. The phone is ALWAYS charging over USB.
What I tried so far, after searching in different forums and via Google:
- Rebooting the phone
- Removing the phone's battery
- Booted in fastboot - no USB connection
- Tried a different USB cable
- Changed the USB ports at pc (without hub, no other USB-devices connected)
- Flashing other ROM (tried CM and MIUI, with full wipe/factory reset)
- Checked the USB-connector in the phone with an electronic microscope - all contacts look fine
I am running out of ideas, the only thing I couldn't try, is another radio, because I don't know how to flash without pc. But I don't think, the problem is related to the radio...
Any help is greatly appreciated.

Bladeinger said:
Hello, XDA-Experts!
I encounter a problem with my desire HD and looking for any help I can get.
Since about one week my Phone is not recognized when connected to a PC.
I am using the phone since December 2010 and it works well since then. It's S-Off and Radio S-Off. In the moment, I am using CoreDroid 4.9 with Radio 26.06.04.06_M. Before I was using the ARHD ROM for some time.
The problem occurs on 3 different PC's with 3 different operating systems (Server 2003, Win 7 Ultimate 64-Bit, Win XP Pro SP3, all of them used to recognize the phone before). Windows never recognizes the phone now, android (in most cases) recognizes the connection an asks for the connection mode. The phone is ALWAYS charging over USB.
What I tried so far, after searching in different forums and via Google:
- Rebooting the phone
- Removing the phone's battery
- Booted in fastboot - no USB connection
- Tried a different USB cable
- Changed the USB ports at pc (without hub, no other USB-devices connected)
- Flashing other ROM (tried CM and MIUI, with full wipe/factory reset)
- Checked the USB-connector in the phone with an electronic microscope - all contacts look fine
I am running out of ideas, the only thing I couldn't try, is another radio, because I don't know how to flash without pc. But I don't think, the problem is related to the radio...
Any help is greatly appreciated.
Click to expand...
Click to collapse
Your device manager shows anything when you connect it to your pc?Debugging mode is enabled?

Device Manager shows nothing. Debugging Mode is enabled.

I went through a similar problem a while back - took ages to resolve it - in my case the problem was the usb cables I was using - I had tried a few - but its possible to get cables that only charge and dont communicate - eventually i got it fixed by using a new original cable.
Might not be this for you but it certainly helped me

No fix that I know of...
I had this problem...
I tried different computers, different SD cards, I could take the sd card out and put it in a usb holder and that would work fine, so it really wasn't the sd card. I tried different usb cables too.... nothing would work.
I spoke to my carrier (Orange) to see if they could sort out the problem, and they went through their 'script' of diagnostics and came to the conclusion that it was my computer drivers and there was nothing wrong with the phone!!!
I then rang HTC and after several phones calls later, they said that they would repair it, unfortunately that would have left me without a phone for 2 weeks, so I rang Orange again to demand that they replaced the phone! I told them that HTC had said it was a fault and they sent out a replacement Luckily I had not rooted it at this point, so it was easy for me to swap it.
The replacement phone came the next day, and like magic, worked fine when I connected it to my computer (the same one that apparently had faulty drivers!!)
So, I never found a fix for this, but managed to get a replacement! hopefully you will be able to sort something out...
Good luck

I had this problem once and it turned out to be kernel related, but I'm not sure if this would apply in your case since you've flashed a few ROMs and still have the issue. Still, might be worth trying one of Apache's Buzz kernels or LeeDrOiD's latest... if only to rule out another possibility.

does your PC recognize it if you mount the SD in recovery?
if not, it should be the cable
I had the same thing, I went crazy, and somebody told me to use another cable
and worked

Same happened to me.
Seems the phone crashed the USB controller or something on the PC.
A reboot of the PC fixed it for me (I dont see you mention that anywhere).

First of all, thanks a lot for all your replies!
As I said before, I tried 2 different cables, that both worked fine before. But after your replies I tried a third, new one - same result.
The card is recognized fine by windows when I put it in a USB-Card Adapter.
What I forgot to mention in my initial post, is, that I also formatted the card in my pc, put it back in the phone and started the phone new - same result.
I will try some other kernels now. B.t.w., has anyone a solution for flashing the radio without pc? Via terminal, or recovery? As this is one of the few things, that I couldn't try yet.

I'm 99% sure radio wont be a factor in this mate as they only deal with mobile connections, eg GSM/3G, Bluetooth, WiFi and GPS. If the problem is software and not hardware then I think it will be with the Android USB gadget driver, which is in the kernel. Someone please correct me if I am wrong.

Can you mount as usb in CWM?

No, that doesn't work either.
Sent from my Desire HD using XDA Premium App

1) Try reinstall HTC driver on your windows and try again.
2) If it failed, backup all your files on sd card via USB-Card Adapter. Then use SD Formatter 3.0 (google it) to format the sd card. Copy the backup files back to SD card and try mount the usb again.

HELP i got the same problem
I use the phone in the last 6 months; I have S-OFF, clockworks custom recovery and rooted stock HTC 2.2 Froyo. The only change I made last week is purchasing a desktop cradle "stand". I tested the stand several times the last week and I was able to access the SD card & the HTC sync modes successfully.
Now when I connect the phone using stand or any other USB cable including the original HTC; nothing happened on the computer! The USB manager activates and brings up the USB connection type menu. However, nothing recognized by PC.
I tried all things that you can expect (another PC, another cable, factory reset, new room, with/without cradle) nothing happened, even I connected the phone on a new PC it didn’t detect the new driver!
What to do now??

Hi,
Not sure if you have already, but you can try the new HTC sync version 3.0.5557 - It's actually for the HTC flyer tablet, but i installed it and it works perfectly for the DHD.
You might have a driver issue, but the new 3.0 sync comes with new windows drivers so maybe it's worth a shot.
I've checked the HTC Flyer support page but there's no link there for the 3.0 Synch ... I could only find a direct link, here below
http://www.htc.com/www/SupportViewNews.aspx?dl_id=1097&news_id=923
Be sure to un-install the previous HTC sync first

Its not a driver issue, I tried the new sync. Not working. Nothing is working with USB only the charger.
I have a feeling that electrostatic damaged my USB. I remembered last week I touch the phone while charging and a one electrostatic click was strong.

help!!
Bladeinger said:
Hello, XDA-Experts!
I encounter a problem with my desire HD and looking for any help I can get.
Since about one week my Phone is not recognized when connected to a PC.
I am using the phone since December 2010 and it works well since then. It's S-Off and Radio S-Off. In the moment, I am using CoreDroid 4.9 with Radio 26.06.04.06_M. Before I was using the ARHD ROM for some time.
The problem occurs on 3 different PC's with 3 different operating systems (Server 2003, Win 7 Ultimate 64-Bit, Win XP Pro SP3, all of them used to recognize the phone before). Windows never recognizes the phone now, android (in most cases) recognizes the connection an asks for the connection mode. The phone is ALWAYS charging over USB.
What I tried so far, after searching in different forums and via Google:
- Rebooting the phone
- Removing the phone's battery
- Booted in fastboot - no USB connection
- Tried a different USB cable
- Changed the USB ports at pc (without hub, no other USB-devices connected)
- Flashing other ROM (tried CM and MIUI, with full wipe/factory reset)
- Checked the USB-connector in the phone with an electronic microscope - all contacts look fine
I am running out of ideas, the only thing I couldn't try, is another radio, because I don't know how to flash without pc. But I don't think, the problem is related to the radio...
Any help is greatly appreciated.
Click to expand...
Click to collapse
hey I have same problem... :-/
what's the solution ?? plz tell me

same problem
please help

Phone not Mounting on PC

So my phone was mounting fine on my pc, and then all of a sudden it wasn't. My Nexus 7 still mounts properly and accepts developer commands, but the m8 won't (yes developer settings is on).
I tried wiping and flashing a rom clean and it still doesn't work, charges fine though. Any advice?

Subscribed
I'm having the same issue. Stock non rooted and it will not connect. I have tried it on other computers cables ports everything.

Art2Fly said:
So my phone was mounting fine on my pc, and then all of a sudden it wasn't. My Nexus 7 still mounts properly and accepts developer commands, but the m8 won't (yes developer settings is on).
I tried wiping and flashing a rom clean and it still doesn't work, charges fine though. Any advice?
Click to expand...
Click to collapse
You might try a different cord.
Open Device Manager in Windows and then plug the phone in. Do you see it in the list with a little yellow triangle? Do you see Android USB Devices listed?

OP after literally messing with various driver files, 8 usb ports and 2 laptops, I dug out my old box of cables and found a taped up, on its last limb OEM HTC EVO 4g (not lte the original) cable. This thing has been through the ringer. But its exactly what It needed. I figured with the 3 cable I had already tried this wasn't the issue, but have you tried using an OEM cable? I guess that is all that works. Good Luck

beamer1341 said:
OP after literally messing with various driver files, 8 usb ports and 2 laptops, I dug out my old box of cables and found a taped up, on its last limb OEM HTC EVO 4g (not lte the original) cable. This thing has been through the ringer. But its exactly what It needed. I figured with the 3 cable I had already tried this wasn't the issue, but have you tried using an OEM cable? I guess that is all that works. Good Luck
Click to expand...
Click to collapse
Still trying to get it to work, have tried 4 cables myself. I might just end up having to return the phone.... Fastboot works in bootloader

Art2Fly said:
Still trying to get it to work, have tried 4 cables myself. I might just end up having to return the phone.... Fastboot works in bootloader
Click to expand...
Click to collapse
Uninstall all HTC drivers and HTC Sync. Then connect the phone. DO NOT choose the option to automatically install any drivers.
Open Device Manager, find the phone. Select the option to manually pick the driver, and select the generic MTP device driver.
This is what worked for me, after countless attempts at re-installing various HTC drivers, different cables and ports, etc.

Bump. Still looking for answer to this. I have RUU'ed both to Sense and Google Phone editions and the problem still persists, the phone does not detect its connected to a computer and change to mtp accordingly. Only way I was able to get the RUU in there was through fastboot, which is again the only time I can access the phone through usb. Adb is no luck in either android or recovery.

Art2Fly said:
Bump. Still looking for answer to this. I have RUU'ed both to Sense and Google Phone editions and the problem still persists, the phone does not detect its connected to a computer and change to mtp accordingly. Only way I was able to get the RUU in there was through fastboot, which is again the only time I can access the phone through usb. Adb is no luck in either android or recovery.
Click to expand...
Click to collapse
Have you tried revoking the USB debugging authorization and then accepting the RSA fingerprint key again when connecting to PC?
Obviously it can't be an USB cable problem if you can connect to it in bootloader mode and use fastboot commands.

To clarify, the phone just charges when connected, it does not detect that it is connected to PC so debugging doesn't even trigger, neither does mtp. I don't even get the slow charging notification

Does it do the same when you plug it in and reboot the computer to "pick up" during boot up process? Or if you run a live CD? I never had an issue like that with my phone but I did have a similar problem with the USB external blu ray drive I bought some time ago. The pc just didn't detect it at all not on any of the ports until I rebooted my PC with the drive already plugged it and for some reason it picked it up. <Not a solution as I don't know what caused it to not be detected in the first place but still...
Not sure if it's an issue with the device(Phone for you, blu ray drive for me) or if it's a problem with the PC even though other things might still work for you as it definitely did for me(phone, headset, mouse, keyboard, usb extender + all the external hard-drives connected to it)...

Problem exists in all computers, Mac, pc, linux

Did you try what I suggest in Post #6 above?
This worked for me when I had the same issue. adb and fastboot would work, but it would not mount MTP.
And just in the last day or 2 I helped someone else with the same issue and fix.

The phone doesn't show up in device manager.

Have you modify the Kernel? (Applying some settings for example)
I browsed over the web for this issue and found some people with the same problems. They solved by removing the settings applied on the kernel or flashing a new one.

I've flashed various kernels and ruu, still same result

Still looking for help