I have I.MX28 custom board and run with default kernel(linux-126.96.36.199) and fs without any problem.
I have to upgrade kernel to linux-3.1 or higher. I tried linux-3.4.1.
I don't use uboot, use imx28_ivt_linux.sb image with sdcard.
I give path of new kernel for "kernel(Local Linux directory build)" config after "./ltib -m config". There is no problem, it was built and tried to run with new imx28_ivt_linux.sb but it hanged up after "Uncompressing Linux... done, booting the kernel" message.
I need your help, ideas..