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Here's what happened: I have Ubuntu 19.10 installed + NVIDIA driver 340
+ 4K screen. Everything works file. I upgraded my NVIDIA driver to 435
and then everything is still fine until the login screen. When I enter
my password, the screen goes black. So, I connected my old HD monitor,
rebooted, and it worked! Funny thing is that, when I'm logged in the OS,
if I reconnect my 4K monitor, it works! But if I restart my system, the
problem persists.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: xorg 1:7.7+19ubuntu12
ProcVersionSignature: Ubuntu 5.3.0-23.25-generic 5.3.7
Uname: Linux 5.3.0-23-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.03.00.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0000:03:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  435.21  Sun Aug 25 08:17:57 
CDT 2019
 GCC version:  gcc version 9.2.1 20191008 (Ubuntu 9.2.1-9ubuntu2)
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Tue Nov 26 19:21:07 2019
DistUpgraded: Fresh install
DistroCodename: eoan
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 435.21, 5.3.0-23-generic, x86_64: installed
 openrazer-driver, 2.6.0, 5.3.0-22-generic, x86_64: installed
 openrazer-driver, 2.6.0, 5.3.0-23-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 NVIDIA Corporation GM107GL [Quadro K2200] [10de:13ba] (rev a2) (prog-if 00 
[VGA controller])
   Subsystem: NVIDIA Corporation GM107GL [Quadro K2200] [10de:1097]
InstallationDate: Installed on 2019-10-18 (39 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: Dell Inc. Precision Tower 5810
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-23-generic 
root=UUID=ab778d32-5ce1-4c38-a14e-2024d96eb5d3 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/24/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A32
dmi.board.name: 0K240Y
dmi.board.vendor: Dell Inc.
dmi.board.version: A02
dmi.chassis.type: 7
dmi.chassis.vendor: Dell Inc.
dmi.modalias: 
dmi:bvnDellInc.:bvrA32:bd09/24/2019:svnDellInc.:pnPrecisionTower5810:pvr:rvnDellInc.:rn0K240Y:rvrA02:cvnDellInc.:ct7:cvr:
dmi.product.name: Precision Tower 5810
dmi.product.sku: 0617
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.99-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.1-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.5+git20191008-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-1ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: nvidia-graphics-drivers-435 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug eoan ubuntu
-- 
My 4K display goes black screen when I updated my NVIDIA driver from 340 to 435
https://bugs.launchpad.net/bugs/1854114
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which is subscribed to nvidia-graphics-drivers-435 in Ubuntu.

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