I have experience similar problem after flash to KK4.2.2: adb never connect and no authorization confirmation pop up will show. I found that in my device manager there is a device called "One X" without driver. I get all my htc driver from http://forum.xda-developers.com/show....php?t=2217396
never installed htc sync. I searched around, everyone was talking about disable and re-enablle adb debug and "allow" its access from the popup and no one was having the "no driver" problem. I solved this problem by editing one inf file in the installed driver.
If you have installed the driver from the link above, under:
C:\Program Files (x86)\HTC\HTC Driver\Driver Files\Win7_x64
there will be a file named androidusb.inf
. Depending on your windows installation path and bitness, this path may be slightly different. Edit it with notepad, find a line
insert the following line just below that line
save the file and use "update driver" in device manager to install driver. manually select the search directory and windows should find the driver. After the driver is installed, adb works like a charm.