it turned out virtual-box-guest-dkms was not installed at all (I formerly did apt install virtualbox-guest-x11 to install the guest utilities; are there any dependencies missing?)
after
apt install virtual-box-guest-dkms
I got an error message (in the terminal):
module 5.0.16_ubuntu for vboxvideo.ko is not newer than what is already found in kernel 4.4.0-18-generic. You may override by specifiying --force.
---
I now tried
dpkg-reconfigure virtualbox-guest-dkms --force
same error again; I don't know for which command I should use --force
---
I finally tried:
dkms build -m virtualbox-guest -v 5.0.16
Module virtualbox-guest/5.0.16 already built for kernel 4.4.0-18-generic/4
it turned out virtual- box-guest- dkms was not installed at all (I formerly did apt install virtualbox- guest-x11 to install the guest utilities; are there any dependencies missing?)
after
apt install virtual- box-guest- dkms
I got an error message (in the terminal):
module 5.0.16_ubuntu for vboxvideo.ko is not newer than what is already found in kernel 4.4.0-18-generic. You may override by specifiying --force.
---
I now tried
dpkg-reconfigure virtualbox- guest-dkms --force
same error again; I don't know for which command I should use --force
---
I finally tried:
dkms build -m virtualbox-guest -v 5.0.16 guest/5. 0.16 already built for kernel 4.4.0-18-generic/4
Module virtualbox-
dkms install -m virtualbox-guest -v 5.0.16 guest/5. 0.16 already installed on kernel 4.4.0-18- generic/ x86_64
Module virtualbox-
---
after a reboot, the problem persists (as expected)