Suspend to RAM on lid close does not work

[Wolf Rogner]

Upgraded to 18.10, installed NVIDIA-384 meta package for latest NVIDIA drivers.

Closing the lid does not suspend the machine.

journalctl:

...
Okt 20 12:27:53 mbpr15a systemd-logind[1185]: Lid closed.
Okt 20 12:27:53 mbpr15a /usr/lib/gdm3/gdm-x-session[2297]: (EE) event8 - bcm5974: libinput bug: 3: invalid tap event TAP_EVENT_RELEASE in state TAP_STATE_TAPPED
Okt 20 12:27:53 mbpr15a gnome-shell[2461]: setup_framebuffers: assertion 'width > 0' failed
Okt 20 12:27:57 mbpr15a systemd-logind[1185]: Lid opened.
Okt 20 12:27:57 mbpr15a gnome-shell[1723]: _st_paint_shadow_with_opacity: assertion 'shadow_pipeline != NULL' failed
Okt 20 12:27:57 mbpr15a gnome-shell[1723]: _st_paint_shadow_with_opacity: assertion 'shadow_pipeline != NULL' failed
Okt 20 12:27:57 mbpr15a gnome-shell[1723]: _st_paint_shadow_with_opacity: assertion 'shadow_pipeline != NULL' failed
Okt 20 12:27:57 mbpr15a gnome-shell[1723]: _st_paint_shadow_with_opacity: assertion 'shadow_pipeline != NULL' failed
Okt 20 12:27:57 mbpr15a gnome-shell[1723]: _st_paint_shadow_with_opacity: assertion 'shadow_pipeline != NULL' failed
Okt 20 12:27:57 mbpr15a gnome-shell[1723]: _st_paint_shadow_with_opacity: assertion 'shadow_pipeline != NULL' failed
Okt 20 12:27:57 mbpr15a gnome-shell[1723]: _st_paint_shadow_with_opacity: assertion 'shadow_pipeline != NULL' failed
...

the machine is set so that lid close should trigger suspend.

cmd-L suspend OK

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: nvidia-384 390.87-0ubuntu1
ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
Uname: Linux 4.18.0-10-generic x86_64
NonfreeKernelModules: wl nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu13
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 20 12:29:14 2018
InstallationDate: Installed on 2018-04-28 (174 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: nvidia-graphics-drivers-390
UpgradeStatus: Upgraded to cosmic on 2018-10-20 (0 days ago)