Re 1: the issue started to happen after I moved the hard disk to the 840 G1 (from a 6930p), which was around August/September. Updates usually get installed within a day (unless I have only limited Internet access, which was not the case when I switched laptops), thus the system should have been fairly up-to-date at the time.
Re 2: I will keep an eye on this, may take a while though (most of the time the system is docked or has an external display connected). Re 3: I would say several times per day (i.e. 8–16 hours of usage), every few hours on average. I’ll keep an eye on it and report back. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1715749 Title: Intermittent black screen on HP EliteBook 840 G1 Status in xorg package in Ubuntu: Incomplete Bug description: Occasionally, the internal laptop display goes black for a few seconds, then comes back to life. The external display stays on. It looks as if power management were kicking in by error but affecting only the internal display. When I’m working with the external display, I need to move the mouse into the area managed by the internal display to wake it up again; else it seems to remain black (though I haven’t tested that behavior thoroughly). Most tests with the external display were made with the port replicator and an external display plugged into one of the DP ports via a DP–DVI adapter. I cannot tell for sure what the behavior is with the external display plugged directly into the laptop. The hard disk was originally installed with Ubuntu MATE 14.10 in a HP EliteBook 6930p, upgraded to 15.04, 15.10 and eventually 16.04 and finally moved to the EliteBook 840 G1. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3 ProcVersionSignature: Ubuntu 4.4.0-93.116-generic 4.4.79 Uname: Linux 4.4.0-93-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.10 Architecture: amd64 CurrentDesktop: MATE Date: Fri Sep 8 00:53:24 2017 EcryptfsInUse: Yes InstallationDate: Installed on 2014-12-09 (1002 days ago) InstallationMedia: Ubuntu MATE 14.10 "Utopic Unicorn" - amd64 (20141023) SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) --- ApportVersion: 2.20.1-0ubuntu2.15 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: MATE DistUpgraded: Fresh install DistroCodename: xenial DistroRelease: Ubuntu 16.04 DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Haswell-ULT Integrated Graphics Controller [103c:198f] InstallationDate: Installed on 2014-12-09 (1158 days ago) InstallationMedia: Ubuntu MATE 14.10 "Utopic Unicorn" - amd64 (20141023) MachineType: Hewlett-Packard HP EliteBook 840 G1 Package: xorg 1:7.7+13ubuntu3 PackageArchitecture: amd64 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-112-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.4.0-112.135-generic 4.4.98 Tags: xenial ubuntu Uname: Linux 4.4.0-112-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 05/23/2016 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: L71 Ver. 01.37 dmi.board.name: 198F dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 15.59 dmi.chassis.asset.tag: CNU407CM0V dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvrL71Ver.01.37:bd05/23/2016:svnHewlett-Packard:pnHPEliteBook840G1:pvrA3009DD10203:rvnHewlett-Packard:rn198F:rvrKBCVersion15.59:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP EliteBook 840 G1 dmi.product.version: A3009DD10203 dmi.sys.vendor: Hewlett-Packard version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.83-1~16.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.4-0ubuntu1~16.04.4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.4-0ubuntu1~16.04.4 version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.7 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1715749/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp