Comment 1 for bug 1752798

Note that on my personal laptop, there's a difference in the Xorg.0.log regarding the detection of the NVidia gfx board, the failing run using xubuntu-default-settings package version 18.04.2 and the succeeding run using version 18.04.1:

$ diff -u <( sed -e 's/^\[[^]]*\] //' failing_run_normal/Xorg.0.log ) <( sed -e 's/^\[[^]]*\] //' succeeding_run_normal/Xorg.0.log )
--- /dev/fd/63 2018-03-03 10:56:14.561604710 +0100
+++ /dev/fd/62 2018-03-03 10:56:14.561604710 +0100
@@ -13,7 +13,7 @@
 Markers: (--) probed, (**) from config file, (==) default setting,
  (++) from command line, (!!) notice, (II) informational,
  (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
-(==) Log file: "/var/log/Xorg.0.log", Time: Sat Mar 3 10:19:26 2018
+(==) Log file: "/var/log/Xorg.0.log", Time: Sat Mar 3 10:28:10 2018
 (==) Using config directory: "/etc/X11/xorg.conf.d"
 (==) Using system config directory "/usr/share/X11/xorg.conf.d"
 (==) No Layout section. Using the first Screen section.
@@ -44,7 +44,7 @@
 (==) ModulePath set to "/usr/lib/xorg/modules"
 (II) The server relies on udev to provide the list of input devices.
  If no devices become available, reconfigure udev or disable AutoAddDevices.
-(II) Loader magic: 0x5616c8d2d020
+(II) Loader magic: 0x55d268f62020
 (II) Module ABI versions:
  X.Org ANSI C Emulation: 0.4
  X.Org Video Driver: 23.0
@@ -55,6 +55,7 @@
 (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
 (II) xfree86: Adding drm device (/dev/dri/card1)
 (--) PCI:*(0:0:2:0) 8086:191b:103c:820d rev 6, Mem @ 0xa2000000/16777216, 0xb0000000/268435456, I/O @ 0x00006000/64, BIOS @ 0x????????/131072
+(--) PCI: (0:1:0:0) 10de:139a:103c:820d rev 162, Mem @ 0xa3000000/16777216, 0x90000000/268435456, 0xa0000000/33554432, I/O @ 0x00005000/128, BIOS @ 0x????????/524288
 (II) LoadModule: "glx"
 (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
 (II) Module glx: vendor="X.Org Foundation"

[following lines omitted, as there's no significant difference apart from more activity due to the DM actually coming up in the succeeding run]