It seems xubuntu-default-settings installs the following files/directories. I do not see a lightdm.conf or any resolution specs listed in any of the files:
/usr/share/lightdm$ ls -al lightdm.conf.d/
total 44
drwxr-xr-x 2 root root 4096 Mar 6 20:35 .
drwxr-xr-x 5 root root 4096 Oct 17 17:34 ..
-rw-r--r-- 1 root root 152 Aug 29 2018 50-disable-guest.conf
-rw-r--r-- 1 root root 76 Aug 29 2018 50-disable-log-backup.conf
-rw-r--r-- 1 root root 66 Aug 29 2018 50-greeter-wrapper.conf
-rw-r--r-- 1 root root 62 Aug 29 2018 50-guest-wrapper.conf
-rw-r--r-- 1 root root 45 Aug 29 2018 50-xserver-command.conf
-rw-r--r-- 1 root root 47 Jul 28 2018 50-xubuntu-numlock.conf
-rw-r--r-- 1 root root 45 May 3 2017 60-lightdm-gtk-greeter.conf
-rw-r--r-- 1 root root 30 Jul 28 2018 60-xubuntu.conf
-rw-r--r-- 1 root root 164 Aug 27 2018 90-nvidia.conf
/usr/share/lightdm$ ls -al lightdm-gtk-greeter.conf.d/
total 16
drwxr-xr-x 2 root root 4096 Oct 17 17:35 .
drwxr-xr-x 5 root root 4096 Oct 17 17:34 ..
-rw-r--r-- 1 root root 319 May 3 2017 01_ubuntu.conf
-rw-r--r-- 1 root root 267 Jul 28 2018 30_xubuntu.conf
$ less 60-lightdm-gtk-greeter.conf
[Seat:*]
greeter-session=lightdm-gtk-greeter
$ less 60-xubuntu.conf
[Seat:*]
user-session=xubuntu
$ less 90-nvidia.conf
[SeatDefaults]
# Force using traditional X
type=xlocal
# Scripts to handle PRIME
display-setup-script=/sbin/prime-offload
display-stopped-script=/sbin/prime-switch
It seems xubuntu- default- settings installs the following files/directories. I do not see a lightdm.conf or any resolution specs listed in any of the files:
/usr/share/lightdm lightdm/ lightdm- gtk-greeter. conf.d lightdm/ lightdm- gtk-greeter. conf.d/ 30_xubuntu. conf lightdm/ lightdm. conf.d
/usr/share/
/usr/share/
/usr/share/
/usr/share/lightdm$ ls -al lightdm.conf.d/ guest.conf log-backup. conf wrapper. conf wrapper. conf command. conf numlock. conf gtk-greeter. conf
total 44
drwxr-xr-x 2 root root 4096 Mar 6 20:35 .
drwxr-xr-x 5 root root 4096 Oct 17 17:34 ..
-rw-r--r-- 1 root root 152 Aug 29 2018 50-disable-
-rw-r--r-- 1 root root 76 Aug 29 2018 50-disable-
-rw-r--r-- 1 root root 66 Aug 29 2018 50-greeter-
-rw-r--r-- 1 root root 62 Aug 29 2018 50-guest-
-rw-r--r-- 1 root root 45 Aug 29 2018 50-xserver-
-rw-r--r-- 1 root root 47 Jul 28 2018 50-xubuntu-
-rw-r--r-- 1 root root 45 May 3 2017 60-lightdm-
-rw-r--r-- 1 root root 30 Jul 28 2018 60-xubuntu.conf
-rw-r--r-- 1 root root 164 Aug 27 2018 90-nvidia.conf
/usr/share/lightdm$ ls -al lightdm- gtk-greeter. conf.d/
total 16
drwxr-xr-x 2 root root 4096 Oct 17 17:35 .
drwxr-xr-x 5 root root 4096 Oct 17 17:34 ..
-rw-r--r-- 1 root root 319 May 3 2017 01_ubuntu.conf
-rw-r--r-- 1 root root 267 Jul 28 2018 30_xubuntu.conf
$ less 60-lightdm- gtk-greeter. conf
[Seat:*] session= lightdm- gtk-greeter
greeter-
$ less 60-xubuntu.conf
[Seat:*] xubuntu
user-session=
$ less 90-nvidia.conf
[SeatDefaults] setup-script= /sbin/prime- offload stopped- script= /sbin/prime- switch
# Force using traditional X
type=xlocal
# Scripts to handle PRIME
display-
display-
$ less 01_ubuntu.conf
# Ubuntu specific defaults
#
[greeter] /usr/share/ backgrounds/ warty-final- ubuntu. png name=LoginIcons slight ~host;~ spacer; ~session; ~language; ~a11y;~ clock;~ power;
background=
theme-name=Ambiance
icon-theme-
font-name=Ubuntu 11
xft-antialias=true
xft-dpi=96
xft-hintstyle=
xft-rgba=rgb
indicators=
clock-format=%d %b, %H:%M
$ less 30_xubuntu.conf
# Xubuntu specific defaults
# Settings stack on top of 01_ubuntu.conf
#
[greeter] /usr/share/ plymouth/ themes/ xubuntu- logo/wallpaper. png name=elementary -xfce-dark timeout= 60
background=
theme-name=Greybird
icon-theme-
font-name=Noto Sans 9
keyboard=onboard
screensaver-