RTR3InitEx failed with rc=-1912 (rc=-1912)

[Bob]

On 2021-01-22 10:41, Ralf Mardorf via ubuntu-users wrote:

> Is the package "dkms" installed?
> 
> If so run
> 
>   dkms status

robert at MARS:~$ dkms status
virtualbox, 6.1.14, 5.8.0-36-generic, x86_64: installed
virtualbox, 6.1.14, 5.8.0-38-generic, x86_64: installed
virtualbox, 6.1.14, 5.8.0-40-generic, x86_64: installed
robert at MARS:~$

So it appears that a VirtualBox update did not update everything that 
was necessary.

VirtualBox shows it is at "6.1.16_Ubuntu r140961"

How to fix this?  I am running Ubuntu 20.10.


> If not, install dkms.
> 
> Is/are the "linux-headers" package/s that fit to the installed kernel/s
> installed?
> 
> If not, install the package/s.
> 
> I extracted an Ubuntu download from Oracle for Ubuntu by my Arch Linux
> install. Unless I'm missing something, the control file for the Ubuntu
> package from Oracle seems only to "recommend" installing the
> kernel-headers and dkms isn't mentioned at all. Oracle might build the
> modules without dkms. OTOH on Arch Linux I build the modules using 
> dkms.
> 
> The recommendation makes sense, since the headers might be
> installed, but not by a package.
> 
> However, you not necessarily need dkms to build modules, it's just the
> most common way to do this. But the linux-headers must be installed,
> either by a package or by you, without using a package.
> 
> https://help.ubuntu.com/community/DKMS
> 
> I don't understand why virtualbox from official Ubuntu packages fails
> with a version mismatch. I suspect the old modules should be removed by
> a hook and the new ones should be build by a hook. This seemingly
> failed to work.