VirtualBox-4.3.32-1.fc22.x86_64 on Fedora 22

I suddenly started getting an error message that VirtualBox couldn’t start my Windows VM because it was set to use 3D acceleration and 3D acceleration wasn’t available. This was strange because I’ve been running this VM on this same machine and never had a problem with it before and hadn’t changed any of its settings. I wondered if it had to do with a recent kernel update or something.

When I ran the last kernel update, I had to run the akmods command to build updated VirtualBox kernel modules. I noticed some error messages about not finding the NVidia module. Which is strange because I don’t have an NVidia graphics card. Just to see what would happen, I installed the NVidia akmods and nothing seemed better or worse, so I left them.

When VirtualBox started complaining suddenly, I wondered if maybe it was noticing the NVidia modules were built, trying to load them, and thinking that since it couldn’t my machine must not have 3D graphics. So I removed all the NVidia stuff:

dnf remove kmod-nvidia-4.2.5-201.fc22.x86_64-355.11-4.fc22.x86_64

Now VirtualBox runs that VM with 3D acceleration, no complaints.