The virtualbox-module vboxdrv.ko won't modprobe: FATAL: Error inserting vboxdrv (/lib/modules/2.6.25-gentoo-r1-2/misc/vboxdrv.ko): Unknown symbol in module, or unknown parameter (see dmesg) And dmesg: vboxdrv: Unknown symbol change_page_attr At compilation-time of the module: WARNING: //lib/modules/2.6.25-gentoo-r1-2/misc/vboxdrv.ko needs unknown symbol change_page_attr Used versions: sys-kernel/gentoo-sources-2.6.25-r1 app-emulation/virtualbox-modules-1.5.6 The problem is, that virtualbox won't work without this module. I found a patch for the module here: http://groups.google.com/group/linux.debian.bugs.dist/browse_thread/thread/14bcc9c1a4afe28b Reproducible: Always Steps to Reproduce:
*** This bug has been marked as a duplicate of bug 218198 ***