Comment 10 for bug 1862559

I asked our desktop team about this, and Iain Lane mentioned that Ubuntu overrides the GNOME default of auto-suspending, but that override only takes effect if you have the ubuntu-settings package installed. I tested this out on a Saber system, and I can confirm that it does seem to only happen when gdm is installed/running and ubuntu-settings is *not* installed. And that explains why I was unable to reproduce in Comment #5. There I had installed ubuntu-desktop which would bring in ubuntu-settings. It also explains why the CUDA-11 dependency chain *did* cause the problem on the x86 server in Comment #8. In that case, gdm3 is getting installed as a Recommends somewhere in the dependency chain - but it does not pull in gnome-settings.

I'll therefore go ahead and close the 'linux' task as Invalid - this isn't a kernel bug. I'll mark the gdm3 bug as "Won't Fix" because, in theory, we could change the defaults inside of gdm3 itself - but we instead recommend users install ubuntu-settings to override the defaults.