Blank screen on resume after suspend and on locking screen

[janm <phenomenalia@yandex.com>]

Hi

Inspired by a comment in another recent thread (I think by Greg Wooledge), I decided to try and use a non-root X. Using Xfce, and unwilling to install gdm (pulls in too much), I decided to disable lightdm (via /etc/X11/default-display manager, and via systemctl).

This works well, I just use startx at boot. However, locking the screen and returning from suspend presents me with a blank screen. When I do Ctrl+Alt+F7, I get a blank screen with a blinking cursor. Ctrl+Alt+F2 etc. get me other tty's, but that means losing my session.

Not sure if light-locker is involved still, but I do know removing it is not an option as it'll remove task-xfce-desktop.

I've checked journalctl, dmesg and Xorg.0.log, and I'm not seeing anything special. I did notice the Xorg log ending on lines like this:

[  1133.884] (II) systemd-logind: got pause for 13:68
[  1133.884] (II) systemd-logind: got pause for 13:67
[  1133.884] (II) systemd-logind: got pause for 13:72
[  1133.884] (II) systemd-logind: got pause for 13:65

In .xinitrc I've added the following: exec startxfce4

I'm on a Dell Latitude E5420, used as 'desktop' (no lid/screen, just external monitor). Modesetting is enabled.

Any hints/comments?

Kind regards

Jan