Virtualbox with Backport Kernel not working

[stangl]

Hi, Plug-Ins runs fine under OMV-Standard-Kernel. After switch to backport kernel Linux nas 3.16.0-0.bpo.4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u3~bpo70+1 (2015-08-08) x86_64 GNU/Linux there is no way to start the kernel module (via "recompile for backport-kernel function" in omv-plugin):

Install build-essential. Reading package lists... Building dependency tree... Reading state information... build-essential is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. Recompile VirtualBox module. Stopping VirtualBox kernel modules ...done. Recompiling VirtualBox kernel modules ...done. Starting VirtualBox kernel modules ...failed! (modprobe vboxdrv failed. Please use 'dmesg' to find out why) Load VirtualBox module. Starting VirtualBox kernel modules ...failed! (modprobe vboxdrv failed. Please use 'dmesg' to find out why)

• Already tried to purge openmediavault-virtualbox and virtualbox-4.3, delete vbox user and Group etc. reinstall the plugin but it´s still the same...
• dmesg | grep vbox dmesg | grep virtualbox dmesg | grep VirtualBox says nothing
• /lib/modules/3.16.0-0.bpo.4-amd64/misc is empty!
• /lib/modules/3.2.0-4-amd64/misc is not empty (vbox stuff is here)

[stangl]

sorry, my fault. my /usb/bin/sort was corrupt which causes the problem. debsums is a very useful tool for something like that...