Dell Latitude E5490 crashes on idle, instead of suspend

[Adam Thiede]

This upstream bug effects Ubuntu kernels as well.

https://bugzilla.kernel.org/show_bug.cgi?id=201271

This question on AskUbuntu is someone else having the same problem.

https://askubuntu.com/questions/1070246/dell-latitude-5490-not-coming-back-from-sleep-mode

This kernel.org bug is exactly what I'm experiencing in the Ubuntu kernel. For me it's ~90% of the time the display turns off (i.e. on idle, before suspend) the system stays on (power LED is on, fan stays on) and it is unresponsive. I am unable to switch to TTY either. It requires a 4-second power button press to reboot the system.

As stated in the bug, sometimes the system light on the front blinks with the CPU error code - orange orange white. The following kernel parameter in GRUB fixes it:
i915.enable_dc=0

Bug exists in Ubuntu 19.10's current kernel as well.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-generic-hwe-18.04 5.0.0.37.95
ProcVersionSignature: Ubuntu 5.0.0-37.40~18.04.1-generic 5.0.21
Uname: Linux 5.0.0-37-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Dec 13 15:50:04 2019
InstallationDate: Installed on 2019-12-11 (2 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-meta-hwe
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.