Cannot connect to PC

My setup:

Phone:
HTC One M8
Android 4.4.4
CyanogenMod version 11-20140831-NIGHTLY-m8
Baseband 1.15.2133156.UA13G_20.18m.4096.04L
Kernel 3.4.0-gc103f16

PC:
Windows 8.1 Pro

I have tried multiple USB ports, also tried on my laptop with Linux Mint , but only got the error message "Unable to mount device"
On Windows, it shows up in device manager, but I cannot install the device's drivers.


I have tried installing HTC Sync, but it does not recognise the phone, but I was guessing that was due to Cyanogenmod (no HTC Bloatware to be found on my phone).

I realise I am running a nightly and am supposed to expect errors here and there, but before I upgraded to Windows 8, it worked through windows explorer (Win7 Ultimate, no extra software needed), now it doesn't.

Could you guys help me?

HTCNerdYoda said:

Ok so you installed HTC Sync and thus should have the latest drivers for HTC One M8 installed!? If not download newest version from HTC and reinstall.

Regarding adb fastboot: do you have the universal adb drivers which solve problems with Windows 8/8.1? If not you can find them here on xda for download. Don't have the link at hand as I'm at work at the moment.

Sent from my HTC One_M8 using XDA Free mobile app

Click to expand...

Click to collapse

Thank you for your reply!

I searched for the mentioned drivers and installed them. I now have only one device in device manager that is not installed:


However, when I try to have Windows look drivers or install from the device list, It just searches for drivers indefinitely.
Also interesting is the fact that when I unplug my phone, the HID device stays in device manager.

Frankly I am lost.

Is this a known bug with CM? It is REALLY annoying.

Thank you for your input.

I tried adb commands.
when I first started the server (using adb start-server) I had a notification saying that the device was listed as seen here.
View attachment 2923953
The notification was on the phone itself, but now I can only find this with adb services in command prompt.

When I enter adb usb or adb root, it merely hangs - nothing happening after at least 15 minutes of waiting.

I am lost again.
Can you point me to the ROM you are using? I am willing to reflash the phone to see if the underlying cause is actually Cyanogenmod, but if it is, I want a good ROM, preferably one where I can choose to NOT use Sense UI (personal preference).

Thank you for your help so far