Hi, I found this thread because I had the same problem. (Hope this would have been posted to a web based forum, now I had to register to nabble and archlinux.org mailing list. Not sure why use anymore old-school mailing lists, when there is https://bbs.archlinux.org/ and you can subscribe to topics. Just a n00b grumbling...) So I tried to follow https://wiki.archlinux.org/index.php/VirtualBox#Hosts_running_a_custom_kernel as Ralph suggested. But I am a n00b. I tried the linux-lts kernel to solve my problem with Firefox being extremely unstable, and then could not kill -9 it (I still don't know whether it's related to the default arch linux kernel, or whether the virtualbox modules interfered). Anyway I installed the linux-lts and configured the /boot/grub/menu.lst for that, and it loaded successfully, and Firefox is now stable, but I missed the virtualbox integration (fullscreen, mousewheel, copy-paste bw. host and guest OS). I did 'pacman -S virtualbox-source', and 'vboxbuild', and I could successfully 'modprobe vboxdrv', and I could add it to /etc/rc.conf MODULES section, and I verified that it loaded successfully (lsmod | grep vbox). But it the above mentioned features did not work. I also checked the /usr/bin/vboxbuild script to find out that it only builds vboxdrv, vboxnetadp, vboxnetflt, vboxpci. I found the result in the dir /lib/modules/3.0.27-1-lts/extramodules. So what about vboxguest, vboxsf and vboxvideo modules, which were earlier installed by the virtualbox-archlinux-additions package (and I had to load them in /etc/rc.conf)? I even tried to remove and install that package again, but it does not help, I think it's just for the default Arch kernel of course. How can I compile and install these modules (vboxguest, vboxsf and vboxvideo) or how can I make the virtualbox integration work properly? I would really appreciate some help on this, thanks in advance. /Attila -- View this message in context: http://archlinux.2023198.n4.nabble.com/virtualbox-modules-lts-tp4463075p4576603.html Sent from the arch general mailing list archive at Nabble.com.