Kernel debugger

hi,
I want to have a debugger for my kernel and
I am using kernel-2.6.11 n i am having patches
kdb-v4.4-2.6.11-common-1.bz2
kdb-v4.4-2.6.11-i386-1.bz2.
I applied both.
I did make menuconfig with options
CONFIG_KDB n CONFIG_FRAME_POINTER being set.

when i tried to compile kernel. I got an error regarding CONFIG_KPROBES
then i did make menuconfig to remove kprobes under kernel hacking section.
It got compiled for sometime n it is giving errors in include/linux/fb.h
saying incomplete type in line no 860.
Are there any configurations to be enabled or disabled during make menuconfig in linux-2.6.11?

Any help is welcome

regards
sriram