The bug seems to have been fixed with the latest unity update (7.2.4+14.04.20150316-0ubuntu1).
-- 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/1438054 Title: Display flickers when changing users Status in xorg package in Ubuntu: New Bug description: Ubuntu 14.04 xorg version: 1:7.7+1ubuntu8.1 This bug occurs when trying to switch between two users on the system where both profiles are loaded. Expected behaviour: The system should switch from the lock screen of user1 to the logon screen of user2. Then, after supplying credentials, it should log on user2. What happened instead: When user2 supplies credentials and tries to log on, the screen flickers for about 5 seconds before showing the deskrop of user2. In some cases (as happened right before this bug report) the system will not succeed in logging on user2 and switch back to the logon screen. Sometimes when the system switches back to the logon screen, the screen will be unresponsive. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8.1 ProcVersionSignature: Ubuntu 3.13.0-48.80-generic 3.13.11-ckt16 Uname: Linux 3.13.0-48-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.14.1-0ubuntu3.7 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: Mon Mar 30 09:13:20 2015 DistUpgraded: Fresh install DistroCodename: trusty DistroVariant: ubuntu DkmsStatus: virtualbox, 4.3.10, 3.13.0-46-generic, x86_64: installed virtualbox, 4.3.10, 3.13.0-48-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller]) Subsystem: CLEVO/KAPOK Computer Device [1558:5455] InstallationDate: Installed on 2014-06-12 (290 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: Notebook W54_55SU1,SUW ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-48-generic root=UUID=be85682b-e370-40b8-afe4-1f292b33d6a8 ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.5 dmi.board.asset.tag: Tag 12345 dmi.board.name: W54_55SU1,SUW dmi.board.vendor: Notebook dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Notebook dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd04/01/2014:svnNotebook:pnW54_55SU1,SUW:pvrNotApplicable:rvnNotebook:rnW54_55SU1,SUW:rvrNotApplicable:cvnNotebook:ct9:cvrN/A: dmi.product.name: W54_55SU1,SUW dmi.product.version: Not Applicable dmi.sys.vendor: Notebook version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.56-1~ubuntu2 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 2:2.99.910-0ubuntu1.4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 xserver.bootTime: Tue Mar 24 08:34:51 2015 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 803 vendor LGD xserver.version: 2:1.15.1-0ubuntu2.7 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1438054/+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