It's merely a client of system-image's D-Bus API, which performs the download and causes the update to be applied. system-image is the place where suspend should be inhibited, IMO (unless the s-i developers think that each consumer should do this itself?).
It doesn't do that.
It's merely a client of system-image's D-Bus API, which performs the download and causes the update to be applied. system-image is the place where suspend should be inhibited, IMO (unless the s-i developers think that each consumer should do this itself?).