I've since upgraded to 13.10 and then 14.04 and I do still see it from time to time, though it's not frequent (it never was).
** Changed in: unity Status: Incomplete => New ** Changed in: unity (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of DX Packages, which is subscribed to unity in Ubuntu. Matching subscriptions: dx-packages https://bugs.launchpad.net/bugs/1261217 Title: screen gets full of small horizontal black segments at random times Status in Unity: New Status in unity package in Ubuntu: New Bug description: Since the last reboot, from time to time, randomly, the screen gets filled of short vertical black lines (segments), for a fraction of a second or few seconds, then gets back to normal. Now a few minutes have passed and apparently it has stopped doing it. Prior to this last reboot some updates had been installed (that's why I had to reboot), and I had never ever seen this happen before, so this may be a regression in some recent update. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: unity 7.0.0daily13.06.19~13.04-0ubuntu1 ProcVersionSignature: Ubuntu 3.8.0-34.49-generic 3.8.13.12 Uname: Linux 3.8.0-34-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.9.2-0ubuntu8.5 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 Date: Sun Dec 15 21:37:06 2013 DistUpgraded: Fresh install DistroCodename: raring DistroVariant: ubuntu DkmsStatus: vboxhost, 4.3.2, 3.8.0-32-generic, x86_64: installed vboxhost, 4.3.2, 3.8.0-33-generic, x86_64: installed vboxhost, 4.3.2, 3.8.0-34-generic, x86_64: installed GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] Device [1025:0647] NVIDIA Corporation GF117M [GeForce 610M/710M / GT 620M/625M/630M/720M] [10de:1140] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] GeForce 710M [1025:0691] InstallationDate: Installed on 2013-10-11 (65 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MachineType: Acer Aspire V3-571G MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-34-generic root=UUID=5830b30e-69e8-4bb4-8a2b-bc2b43c7414a ro quiet splash vt.handoff=7 SourcePackage: unity UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/15/2012 dmi.bios.vendor: Acer dmi.bios.version: V2.07 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: VA50_HC_CR dmi.board.vendor: Acer dmi.board.version: Type2 - Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V2.07 dmi.modalias: dmi:bvnAcer:bvrV2.07:bd10/15/2012:svnAcer:pnAspireV3-571G:pvrV2.07:rvnAcer:rnVA50_HC_CR:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.07: dmi.product.name: Aspire V3-571G dmi.product.version: V2.07 dmi.sys.vendor: Acer version.compiz: compiz 1:0.9.9~daily13.06.19~13.04-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.43-0ubuntu1.1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.7-1ubuntu2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.7-1ubuntu2 version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.6-0ubuntu4.3 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1 xserver.bootTime: Sun Dec 15 21:10:19 2013 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.13.3-0ubuntu6.2 xserver.video_driver: intel To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1261217/+subscriptions -- Mailing list: https://launchpad.net/~dx-packages Post to : dx-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~dx-packages More help : https://help.launchpad.net/ListHelp