Referencing This Thread it appears someone has found a way to give more power to allow the Camera connection kit to work as it did under 4.2.
I'm excited!
and also from br0xHi,
I have found the place where the power is limited in kernel code. I have patched it and verified it works now. You can connect all devices the same way it was before 4.2 firmware. The patched version of kernelcache for 4.2.1 firmware is available at br0x.pl/kernel_usb_power.img But you should know what you are doing while running it. You should not replace the kernelcache at ipad filesystem! You should use a tool like redsn0w, pwnagetool or xpwn to run this kernel tethered. If you don't know how to do it, you should rather wait till comex will integrate my patch with jailbreak utility. Then simply jailbreaking will patch the kernel and make it tethered.
Regards,
br0x
- Edit this last post was dated 8/3 for clarificationI have talked to @comex and he has already created a patched version of jailbreakme.com .. We are still testing it though, so please be patient. I will let you know as soon as it will get released.
I'm excited!