Built a custom linux 4.8-rc8 kernel and I have not seen this problem since. This is most likely a kernel bug.
** Also affects: linux (Ubuntu) Importance: Undecided Status: New -- 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/1621719 Title: Black screen when resuming laptop from sleep Status in elementary OS: New Status in linux package in Ubuntu: New Bug description: To reproduce: 1. Close laptop lid and sleep it overnight 2. Open lid and see lock screen 3. Enter password at lock screen 4. Get a black screen with on the cursor Expected results: See the Elementary desktop Hardware: Lenovo Thinkpad x220 ProblemType: Bug DistroRelease: elementary 0.4 Package: elementary-desktop 1.414+469+r1~daily~ubuntu0.4.1 [origin: LP-PPA-elementary-os-daily] ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CrashDB: elementary_meta CurrentDesktop: Pantheon Date: Thu Sep 8 20:44:28 2016 InstallationDate: Installed on 2016-09-08 (0 days ago) InstallationMedia: elementary OS 0.4 "Loki" - Daily amd64 (20160716) ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: elementary-meta SuspiciousXErrors: ThirdParty: True UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/elementaryos/+bug/1621719/+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