This sounds most likely related to bug 1705369 or bug 1727356. Please try the workarounds mentioned in those and let us know which works for you.
** Package changed: xorg (Ubuntu) => nvidia-graphics-drivers-340 (Ubuntu) ** Changed in: nvidia-graphics-drivers-340 (Ubuntu) Status: New => Incomplete ** Tags added: black-screen -- 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/1790218 Title: Black screen after login Status in nvidia-graphics-drivers-340 package in Ubuntu: Incomplete Bug description: Fresh ubuntu 18.04 Enabled the nvidia driver Black screen after login ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xorg 1:7.7+19ubuntu7.1 ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18 Uname: Linux 4.15.0-33-generic x86_64 NonfreeKernelModules: nvidia wl .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 7.3.0 (Ubuntu 7.3.0-16ubuntu3) .proc.driver.nvidia.warnings.fbdev: Your system is not currently configured to drive a VGA console on the primary VGA device. The NVIDIA Linux graphics driver requires the use of a text-mode VGA console. Use of other console drivers including, but not limited to, vesafb, may result in corruption and stability problems, and is not supported. ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' Date: Fri Aug 31 22:47:30 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu DkmsStatus: bcmwl, 6.30.223.271+bdcom, 4.15.0-33-generic, x86_64: installed nvidia-340, 340.106, 4.15.0-33-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: NVIDIA Corporation GT216GLM [Quadro FX 880M] [10de:0a3c] (rev a2) (prog-if 00 [VGA controller]) Subsystem: Dell GT216GLM [Quadro FX 880M] [1028:040c] InstallationDate: Installed on 2018-08-31 (0 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: Dell Inc. Precision M4500 PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-33-generic root=UUID=50dd2a99-b522-484b-8c75-de09106c92b7 ro quiet splash vt.handoff=1 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/05/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A15 dmi.board.name: 0RRH3K dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA15:bd12/05/2013:svnDellInc.:pnPrecisionM4500:pvr0001:rvnDellInc.:rn0RRH3K:rvrA01:cvnDellInc.:ct9:cvr: dmi.product.name: Precision M4500 dmi.product.version: 0001 dmi.sys.vendor: Dell Inc. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1 version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-340/+bug/1790218/+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