Public bug reported:

Crash occurs every time when booting from Xubuntu 18.04 installation
stick and choosing "Install Xubuntu". Shortly after selecting "Install
Xubuntu", the installer is started, the installation screen is visible
for a few seconds, then the display quickly blanks and drops the user
into a frozen view of the virtual terminal. Shortly thereafter, a
Xubuntu session is automatically started, similarly to having chosen
"Try Xubuntu without installing". Executing "Install Xubuntu" from the
desktop does successfully start the ubiquity installer.

Verifying the installation logs under /var/log/installer shows Xorg as
having crashed with error:

xf860OpenConsole: Switching VT failed

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu6
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperVersion: 1.393
CompositorRunning: None
CurrentDesktop: XFCE
Date: Fri Apr 13 05:42:46 2018
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation HD Graphics 520 [8086:1916] (rev 07) (prog-if 00 [VGA 
controller])
   Subsystem: Intel Corporation Skylake GT2 [HD Graphics 520] [8086:2063]
LiveMediaBuild: Xubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180411)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 045e:00cb Microsoft Corp. Basic Optical Mouse v2.0
 Bus 001 Device 003: ID 04f2:0408 Chicony Electronics Co., Ltd 
 Bus 001 Device 002: ID 058f:6387 Alcor Micro Corp. Flash Drive
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: file=/cdrom/preseed/username.seed boot=casper only-ubiquity 
initrd=/casper/initrd.lz quiet splash ---
SourcePackage: xorg
Symptom: display
Title: Xorg crash
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.vendor: Intel Corp.
dmi.board.vendor: Intel corporation
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu3
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

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic crash ubuntu

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https://bugs.launchpad.net/bugs/1763580

Title:
  Xorg crash

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