On linux, modprobe loading modules from directory /lib/modules/`uname -r`/. Insmod needs full path to module. On maemo more parts using insmod and using /lib/modules/current which is symlink to some kernel directory.

Problem is that this symlink is changed only after (re)installing -modules package. Kernel power has postinst script which replacing current with `uname -r` in /sbin/preinit which seems to fixing these problems.