I forgot to mention that before demonstrating that "Night Light" and "Dim screen when inactive", I upgraded to the latest BIOS from Lenovo on 20 March (a day prior to posting #16 and before turning off the dimming features). It is the Lenovo 85UJ25US (1.46) BIOS, which is an upgrade from 8BET55WW (1.35). It was upgraded in hopes that it would resolve the problem.
Right after the upgrade (and before turning off the dimming features), I also turned off Security->Virtualization and Security->VT-d. I don't have a need for virtualization, and it was mentioned in posts elsewhere that it may contribute to the hang on suspend issue. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1757445 Title: Suspend does not always resume Status in linux package in Ubuntu: Confirmed Status in linux-meta-hwe package in Ubuntu: Confirmed Status in linux source package in Bionic: Confirmed Bug description: Dell XPS 13 9350 on AC power left running overnight, suspends after a given timeout. When coming back the next morning sometimes the laptop resumes to an aubergine desktop (just the screen, no GDM) and cursor and sits there forever. Sometimes it resumes to a black screen and cursor. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-12-generic 4.15.0-12.13 ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7 Uname: Linux 4.15.0-12-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.8-0ubuntu10 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed Mar 21 14:15:04 2018 InstallationDate: Installed on 2018-02-13 (36 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180201) MachineType: Dell Inc. XPS 13 9350 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-12-generic root=UUID=bc5b647b-38ca-4206-9e96-774a5ac6b833 ro quiet splash vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.15.0-12-generic N/A linux-backports-modules-4.15.0-12-generic N/A linux-firmware 1.173 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/18/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.5.1 dmi.board.name: 07TYC2 dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.5.1:bd08/18/2017:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn07TYC2:rvrA01:cvnDellInc.:ct9:cvr: dmi.product.family: NULL dmi.product.name: XPS 13 9350 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1757445/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
