Public bug reported: I think it's something in the nvidia driver, as I only recently switched to using nvida v340.106 from using the nouveau package/driver.
the same symptoms as https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1247189 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3 ProcVersionSignature: Ubuntu 4.13.0-32.35~16.04.1-generic 4.13.13 Uname: Linux 4.13.0-32-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia .proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0' .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 340.106 Tue Jan 9 15:10:23 PST 2018 GCC version: gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.5) .tmp.unity_support_test.0: ApportVersion: 2.20.1-0ubuntu2.15 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 Feb 4 19:51:54 2018 DistUpgraded: Fresh install DistroCodename: xenial DistroVariant: ubuntu DkmsStatus: bbswitch, 0.8, 4.13.0-32-generic, x86_64: installed nvidia-340, 340.106, 4.13.0-32-generic, x86_64: installed ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Samsung Electronics Co Ltd 3rd Gen Core processor Graphics Controller [144d:c709] Subsystem: Samsung Electronics Co Ltd GeForce 710M [144d:c709] InstallationDate: Installed on 2017-03-09 (331 days ago) InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2) MachineType: SAMSUNG ELECTRONICS CO., LTD. 300E5EV/300E4EV/270E5EV/270E4EV/2470EV/2470EE ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic.efi.signed root=UUID=5c64a526-298a-41f4-b7e2-9b47fb5f4405 ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/29/2014 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P08RBK dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: NP270E5E-X01AU dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP08RBK:bd08/29/2014:svnSAMSUNGELECTRONICSCO.,LTD.:pn300E5EV/300E4EV/270E5EV/270E4EV/2470EV/2470EE:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP270E5E-X01AU:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: 300E5EV/300E4EV/270E5EV/270E4EV/2470EV/2470EE dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.83-1~16.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.4-0ubuntu1~16.04.4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.4-0ubuntu1~16.04.4 version.nvidia-graphics-drivers: nvidia-graphics-drivers-* 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: Sun Feb 4 18:36:36 2018 xserver.configfile: /etc/X11/xorg.conf xserver.errors: NVIDIA(0): Failed to initiate mode change. NVIDIA(0): Failed to complete mode change xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.19.5-0ubuntu2~16.04.1 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug compiz-0.9 third-party-packages ubuntu xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1747250 Title: I get a blank screen when switching users To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1747250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
