Public bug reported: I encountered the same symptoms, with the same workaround as: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1382462
My dual monitor setup became essentially non-functional, after installing ccsm. (Although I didn't make the connection until seeing this other bug report, many days later.) Disabling the "Detect Outputs" option (buried deep) in ccsm, restored my display functionality. This is a very, very difficult bug for an end user to diagnose and repair. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1 ProcVersionSignature: Ubuntu 4.2.0-23.28-generic 4.2.6 Uname: Linux 4.2.0-23-generic x86_64 NonfreeKernelModules: nvidia .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 352.63 Sat Nov 7 21:25:42 PST 2015 GCC version: gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2) ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CurrentDesktop: Unity Date: Mon Jan 18 17:04:55 2016 DistUpgraded: Fresh install DistroCodename: wily DistroVariant: ubuntu DkmsStatus: bbswitch, 0.7, 4.2.0-23-generic, x86_64: installed nvidia-352-updates, 352.63, 4.2.0-23-generic, x86_64: installed GraphicsCard: Intel Corporation Device [8086:191b] (rev 06) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:0708] Subsystem: Dell Device [1028:0708] InstallationDate: Installed on 2016-01-15 (3 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: Alienware Alienware 17 R3 PackageArchitecture: all ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-23-generic.efi.signed root=UUID=8248864c-bf52-4c08-a74b-f3a4de1f9eb2 ro quiet splash vt.handoff=7 SourcePackage: compiz UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/11/2015 dmi.bios.vendor: Alienware dmi.bios.version: 1.2.3 dmi.board.name: Alienware 17 R3 dmi.board.vendor: Alienware dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Alienware dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnAlienware:bvr1.2.3:bd11/11/2015:svnAlienware:pnAlienware17R3:pvr1.2.3:rvnAlienware:rnAlienware17R3:rvrA00:cvnAlienware:ct10:cvrNotSpecified: dmi.product.name: Alienware 17 R3 dmi.product.version: 1.2.3 dmi.sys.vendor: Alienware version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.64-1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4 version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3 xserver.bootTime: Mon Jan 18 16:10:03 2016 xserver.configfile: /etc/X11/xorg.conf xserver.devices: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: xserver.version: 2:1.17.2-1ubuntu9.1 ** Affects: compiz (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug ubuntu wily -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1535493 Title: Windows stretched, mouse scaling differently To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1535493/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp