Comment 35 for bug 1969243

As importantly, how can we even know whether the Nvidia power mananagement support is broken or working if the Ubuntu Nvidia packaging never starts nvidia-hibernate.service, nvidia-powerd.service, nvidia-resume.service and nvidia-suspend.service like rpmfusion on Fedora. Of course, we would need a /etc/modprobe.d/nvidia-power-management.conf to get NVreg_PreserveVideoMemoryAllocations=1. However, I'm still unconvinced that the current check for NVreg_PreserveVideoMemoryAllocations=1 in 61-gdm.rules is really functional. I looked at the Debian packaging for nvidia and I don't see any evidence that they have ever started those services.