AFAIK, rebuild the kernel should follow those steps at least: - *copy /boot/system-$(uname -r).map to ${kernel_src}* - *copy /boot/config-$(uname -r) to ${kernel_src}* - *cd ${kernel_src}* - *make menuconfig*, save config(If I don't wanna change anything for test). - *make -j9 bzImage.* - *override /boot/vmlinuz-$(uname -r) with ${kernel_src}/arch/x86/boot/bzImage* Maybe those steps contains some typo or has some different paths. Buts the point is I don't change any features from original setting, I just copy my system.map and config to kernel source's one and rebuild the kernel(should be the same with mine). When I override new kernel and reboot, It just hanged, no any message print out(No Oops, No panics). But if I do those steps with this<http://it.livekn.com/2013/01/compile-kernel.html>, everything goes fine. I just don't know the differences between the standard way and debian's way. Is ubuntu abnormal ?