When I open my computer, elementary OS Loki takes about 10-15 seconds to resume from sleep. The screen is initially off. After a second or two, the backlight turns on but the screen is still black for a while before the login screen appears.
Resuming from sleep took just a few seconds on eOS Freya. I'm running a Dell XPS 13 from 2015.
Any thoughts on how I might speed up the process of resuming from sleep? Thanks!