Hi, Christopher. Thanks for all the helpful links! Indeed, I applied the BIOS update, and the hard freeze is now gone! It's not all working exactly as I expect, but at least the BIOS change cured the worst symptom.
Changes made: Applied MSI BIOS update to version 71D. Changed light-locker back to activate on screensaver activate. New behavior when coming back to laptop with locked screen: Make a movement on the touchpad. Screen remains completely black, BUT computer is still running properly, as shown by network traffic. Click the mouse buttons. Same thing, screen remains completely black, but no hard crash; everything is still running. Press some non-typing keys (shift, ctrl, etc.). Same thing. Blindly type my password into the completely black screen. Screen turns on, unlocks, and shows me my full working X environment, exactly as I'd left it. Which is at least usable. Not ideal, and not what I think is expected behavior, but behavior I can deal with. chaz@cesium:~$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date [sudo] password for chaz: E1763IMS.71D 04/17/2015 chaz@cesium:~$ -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1476343 Title: Freeze on screensaver deactivate when set to lock on screensaver activate Status in xorg package in Ubuntu: Incomplete Bug description: A few months ago, I started having a problem where my laptop would freeze and require a hard reboot when I tried to wake it from screensaver. I tried turning light-locker off; this fixed the problem. However, now due to company policy, I have to turn light- locker back on, and found that the problem still existed. After some searching, and trying different things, I've found that if I set light-locker to activate on screensaver *deactivate*, then everything works properly, and when I wake the laptop from screensaver, I'm presented with a blank X background and password dialog. If I set light-locker back to activate on screensaver *activate*, then my computer continues to run until I press a key or touch the touchpad, at which point it freezes. Note, I keep suspend and hibernate turned off completely on this laptop, and almost never run on battery. The above happens when plugged into AC power. It would appear to be purely in the realm of light-locker and the screensaver. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8.1 ProcVersionSignature: Ubuntu 3.13.0-57.95-generic 3.13.11-ckt21 Uname: Linux 3.13.0-57-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.11 Architecture: amd64 CurrentDesktop: XFCE Date: Mon Jul 20 10:45:46 2015 InstallationDate: Installed on 2014-07-22 (362 days ago) InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) --- ApportVersion: 2.14.1-0ubuntu3.15 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: XFCE DistUpgraded: Fresh install DistroCodename: trusty DistroRelease: Ubuntu 14.04 DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1106] NVIDIA Corporation GK104M [GeForce GTX 870M] [10de:1199] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1106] InstallationDate: Installed on 2014-07-22 (461 days ago) InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) LightdmGreeterLog: ** (lightdm-gtk-greeter:2919): WARNING **: Failed to load user image: Failed to open file '/home/chaz/.face': No such file or directory init: indicator-power main process (3022) killed by TERM signal init: indicator-application main process (3031) killed by TERM signal LightdmGreeterLogOld: ** (lightdm-gtk-greeter:2831): WARNING **: Failed to load user image: Failed to open file '/home/chaz/.face': No such file or directory init: indicator-power main process (2949) killed by TERM signal init: indicator-application main process (2958) killed by TERM signal MachineType: Micro-Star International Co., Ltd. GT70 2PC Package: xorg 1:7.7+1ubuntu8.1 PackageArchitecture: amd64 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-65-generic root=UUID=9dda5f94-8c6c-45a4-8a4c-38b3f69a8b15 ro rootflags=subvol=@ rootflags=discard,ssd,compress=no,subvol=@ quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.13.0-65.105-generic 3.13.11-ckt26 Tags: trusty ubuntu Uname: Linux 3.13.0-65-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo usrp wireshark _MarkForUpload: True dmi.bios.date: 02/12/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: E1763IMS.70T dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: MS-1763 dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: REV:0.C dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Micro-Star International dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrE1763IMS.70T:bd02/12/2014:svnMicro-StarInternationalCo.,Ltd.:pnGT702PC:pvrREV0.C:rvnMicro-StarInternationalCo.,Ltd.:rnMS-1763:rvrREV0.C:cvnMicro-StarInternational:ct10:cvrN/A: dmi.product.name: GT70 2PC dmi.product.version: REV:0.C dmi.sys.vendor: Micro-Star International Co., Ltd. version.compiz: compiz N/A version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.60-2~ubuntu14.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.4 version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.7 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.6 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 xserver.bootTime: Mon Oct 5 09:58:38 2015 xserver.configfile: default xserver.errors: Failed to load module "nvidia" (module does not exist, 0) Failed to load module "nvidia" (module does not exist, 0) NOUVEAU(G0): Failed to initialise context object: 2D_NVC0 (0) NOUVEAU(G0): Error initialising acceleration. Falling back to NoAccel xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 5920 vendor CMO xserver.version: 2:1.15.1-0ubuntu2.7 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1476343/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp