This sounds crazy, but this seems to happen much more frequently when I have, or am interacting with, a terminal or emacs in the second/external screen. The resolution of the display is huge, so these windows tend to be a small fraction of the display.
Also, I think it's actually only the external screen which is going black. However, it started very clearly right when I upgraded. -- 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/1658497 Title: Screens all flash to black for ~1 s periodically under extended desktop Status in xorg package in Ubuntu: New Bug description: I just upgraded to 16.10 from 16.04. Now my screens all go black for ~1 s periodically (once per minute or so) under extended desktop, using a Lenovo T450s. Keyboard still seems to be active during the blackouts. ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: xorg 1:7.7+13ubuntu4 ProcVersionSignature: Ubuntu 4.8.0-34.36-generic 4.8.11 Uname: Linux 4.8.0-34-generic x86_64 .tmp.unity_support_test.0: ApportVersion: 2.20.3-0ubuntu8.2 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Sun Jan 22 12:24:53 2017 DistUpgraded: 2017-01-21 16:13:06,191 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' DistroCodename: yakkety DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo HD Graphics 5500 [17aa:5036] InstallationDate: Installed on 2016-02-12 (344 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) LightdmDisplayLog: [dix] EventToCore: Not implemented yet MachineType: LENOVO 20BXCTO1WW ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-34-generic.efi.signed root=UUID=ea2fb511-8d62-4b96-bdaa-4b3f7bf79cc6 ro noprompt quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to yakkety on 2017-01-21 (0 days ago) dmi.bios.date: 11/06/2015 dmi.bios.vendor: LENOVO dmi.bios.version: JBET54WW (1.19 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BXCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrJBET54WW(1.19):bd11/06/2015:svnLENOVO:pn20BXCTO1WW:pvrThinkPadT450s:rvnLENOVO:rn20BXCTO1WW:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20BXCTO1WW dmi.product.version: ThinkPad T450s dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.13.0+16.10.20160818.2-0ubuntu2 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.70-1 version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.3-1ubuntu2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.3-1ubuntu2 version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-1ubuntu6.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.2-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160706-1ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-2 xserver.bootTime: Sat Jan 21 16:18:53 2017 xserver.configfile: default xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.18.4-1ubuntu6.1 xserver.video_driver: modeset To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1658497/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
