Comment 10 for bug 1615286

This also affects my XUbuntu 16.04.5 x86_64 system. When waking the monitor from sleep, all I get is a blank screen. Switching between TTYs does not help to restore the session or graphical output, only restarting the desktop manager helps (but this means loosing the session).

I have since installed artful's xfce4-settings (I'm aware it's EOL), and this improves the situation a lot for me. When I now wake the monitor from sleep, I get a stuck mouse pointer on an otherwise all black screen when I should get to see the login prompt. However, switching to TTY1 and back to TTY7 will bring up the gdm3 (the desktop manager I have chosen to use) login prompt, and logging in there brings me back to my previous Xubuntu session, which I can then continue.