Stefan Fiedler:

package/base/linux/linux.conf

@@ -378,7 +378,7 @@ main_lx() {
 	case "$lx_cpu" in
 	    i386|x86_64)
 		eval $MAKE bzImage
-		cp -vf arch/i386/boot/bzImage $root/boot/vmlinuz_${lx_kernelrelease}
+		cp -vf arch/$lx_cpu/boot/bzImage $root/boot/vmlinuz_${lx_kernelrelease}
 		if [ "$xpkg" = "$ROCKCFG_PKG_LINUX_DEFAULT" ]; then
 			ln -svf vmlinuz_${lx_kernelrelease} $root/boot/vmlinuz
 		fi