It sounds like step 2 failed. Please go to step 3 of comment #4.
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https://bugs.launchpad.net/bugs/1813843
Title:
[nouveau] Xorg crash
Status in xorg-server package in Ubuntu:
Incomplete
Bug description:
With the newest updates to 18 & with the HP VGA monitor attached I can
enter the pswd but will NOT get to the home screen. It hangs at a
black screen.
If I detach the VGA cable I can power down and boot up to the internal
Laptop screen then attach the VGA after logging into Ubuntu. All is
fine
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7.1
ProcVersionSignature: Ubuntu 4.15.0-44.47-generic 4.15.18
Uname: Linux 4.15.0-44-generic x86_64
.tmp.unity_support_test.0:
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Tue Jan 29 14:28:59 2019
DistUpgraded: 2018-09-13 08:18:43,679 DEBUG got a conffile-prompt from dpkg
for file: '/etc/NetworkManager/NetworkManager.conf'
DistroCodename: bionic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation 4th Gen Core Processor Integrated Graphics Controller
[8086:0416] (rev 06) (prog-if 00 [VGA controller])
Subsystem: Lenovo 4th Gen Core Processor Integrated Graphics Controller
[17aa:221e]
NVIDIA Corporation GK106GLM [Quadro K2100M] [10de:11fc] (rev a1) (prog-if 00
[VGA controller])
Subsystem: Lenovo GK106GLM [Quadro K2100M] [17aa:221e]
InstallationDate: Installed on 2014-12-13 (1508 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
(20140722.2)
MachineType: LENOVO 20BG0016US
ProcEnviron:
LANGUAGE=en_US
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-44-generic
root=UUID=6f412d93-ba4b-4a3a-a067-9d615e154680 ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
Title: Xorg crash
UpgradeStatus: Upgraded to bionic on 2018-09-13 (138 days ago)
dmi.bios.date: 01/12/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: GNET70WW (2.18 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BG0016US
dmi.board.vendor: LENOVO
dmi.board.version: 0B98401 Pro
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrGNET70WW(2.18):bd01/12/2015:svnLENOVO:pn20BG0016US:pvrThinkPadW540:rvnLENOVO:rn20BG0016US:rvr0B98401Pro:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad W540
dmi.product.name: 20BG0016US
dmi.product.version: ThinkPad W540
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
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.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
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
xserver.bootTime: Tue Jan 29 14:14:34 2019
xserver.configfile: default
xserver.errors: NOUVEAU(G0): [XvMC] Failed to initialize extension.
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.19.6-1ubuntu4.2
xserver.video_driver: modeset
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