Dang... that sucks
I looked on XDA and noticed that the developer for Jellybam on the One S stopped the updates. We only have Jellybam 6.3.
but if I was you... Id wipe the kernel completely using this
[MOD][SCRIPT] SuperWipe Script & Kernel Cleaning Script - xda-developers
Then Id use fastboot to flash the desired Kernel boot.img (I know you have S-off, but doesnt hurt to make sure)
then flash the ROM and Kernel you want. (I guess you could use the stock kernel with the ROM... but it just sounds like it isnt working)
Im not too certain on the One X... but the One S has some devices that are more sensitive than others (thats what we call it for the devices that cannot get the camera, gps, wifi, to work when everyone elses works fine)
So maybe you have a sensitive One X.