Comment 4 for bug 1654025

'lxc exec'ing the same command seems to always work, as does running bash and then poking things. I didn't yet try to do every single thing that autopkgtest does manually.

I did notice that rebooting took a little while to happen when I ran 'reboot' from within a container, so a theory to investigate is whether this is actually a delayed previous reboot request taking down the script. nvidia is quite big so it might be acting as a synchronisation point making the apt-get source line of investigation a red herring.