I have a Dell XPS 13 9380 under Xubuntu 18.04. Xubuntu is the only machine operating system. The version of my kernel is 4.18.0. I managed to flash the latest BIOS update from the Dell site. I've also implemented the first comment solution on this post. Unfortunately, this did not solve the problem.
My current problem is that the machine will seem to hang, but when I press the power button to make it appear, the screen will blink once and then darken. I press again on the power button. The Xubuntu logo appears, but the machine stops. This happens every time I try to get it out of suspension.
Are there any parameters that I should know to solve this problem?