Public bug reported:

About 1 out 10 attempts, my computer fails to wake up from sleep.
Instead of waking up, it switches off.
It doesn't matter if I wake from power button or keyboard.
Looks like this is a recent development, as this worked okay until a few months 
ago.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-29-generic 4.15.0-29.31
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  izak       2687 F.... pulseaudio
 /dev/snd/controlC1:  izak       2687 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug  5 11:37:57 2018
HibernationDevice: RESUME=UUID=4226b1a5-ebed-4bf9-afa2-33431caa2763
InstallationDate: Installed on 2014-10-24 (1380 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: ASUS All Series
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-29-generic 
root=/dev/mapper/ubuntu--vg-root ro acpi_enforce_resources=lax quiet splash 
vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-29-generic N/A
 linux-backports-modules-4.15.0-29-generic  N/A
 linux-firmware                             1.173.1
SourcePackage: linux
UpgradeStatus: Upgraded to bionic on 2018-04-27 (99 days ago)
dmi.bios.date: 06/24/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2501
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z97-PRO(Wi-Fi ac)
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr2501:bd06/24/2015:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ97-PRO(Wi-Fiac):rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: ASUS MB
dmi.product.name: All Series
dmi.product.version: System Version
dmi.sys.vendor: ASUS

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1785464

Title:
  Computer fails to wake up from sleep, about 10% of attempts

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