** Attachment added: "dmesg.txt" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1437719/+attachment/4359187/+files/dmesg.txt
-- 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/1437719 Title: Black Screen on user switch Status in xorg package in Ubuntu: New Bug description: When switching users (primarly using Ctrl-Alt-F(7-10) the monitor will sometimes go black. This happens once or twice a day, although on occasion it doesn't occur for several days. It has occurred at least once a week since I installed Ubuntu 14.04.1. It seems to be more of a problem since moving to 14.04.2 - I did perform installation of the Utopic Kernel, X, and MesaGL packages, but this is only perception. At the same time I switched from Unity to Cinnamon (Jeremy Clarkson isn't the only dinosaur roaming the world) - but I have confirmed that just running Unity desktops is vunerable. The display can be restored by sudo service lightdm restart - run from an ssh login from another system. Steps to consistently reproduce the problem is simply to perform abusive user stress testing: switching from one user to another rapidly: as soon as the display switches go back to the other. Usually I can get a black screen with this method in under a minute with Unity desktops. I have the same issue with another system (Dell Vostro 3550) reported in Bug #1437557 - submitting a new defect since this is different hardware and even though the defects look the same there might be differences underneath the hood causing the problem. 14.04.2 Trusty 3.16.0-33-generic. I'll edit this report shortly with additional system info. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xorg 1:7.7+1ubuntu8.1 ProcVersionSignature: Ubuntu 3.16.0-33.44~14.04.1-generic 3.16.7-ckt7 Uname: Linux 3.16.0-33-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.14.1-0ubuntu3.8 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None Date: Sat Mar 28 14:45:26 2015 DistUpgraded: Fresh install DistroCodename: trusty DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:063e] InstallationDate: Installed on 2014-12-23 (95 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Dell Inc. Inspiron 5547 ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-33-generic root=UUID=6eb0eadb-81ed-43ee-aab3-e3fe6b37ca75 ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/12/2014 dmi.bios.vendor: Dell Inc. dmi.bios.version: A05 dmi.board.name: 0598GM dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: A05 dmi.modalias: dmi:bvnDellInc.:bvrA05:bd08/12/2014:svnDellInc.:pnInspiron5547:pvrA05:rvnDellInc.:rn0598GM:rvrA00:cvnDellInc.:ct8:cvrA05: dmi.product.name: Inspiron 5547 dmi.product.version: A05 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.11.3+14.04.20150122-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.56-1~ubuntu2 version.libgl1-mesa-dri: libgl1-mesa-dri N/A version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core N/A version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A xserver.bootTime: Fri Mar 27 15:14:18 2015 xserver.configfile: default xserver.errors: SynPS/2 Synaptics TouchPad: Read error 19 SynPS/2 Synaptics TouchPad: Read error 19 xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 1110 vendor LGD xserver.version: 2:1.16.0-1ubuntu1.2~trusty2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1437719/+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
