Achei isso nos logs:
Start-Date: 2021-01-04 20:23:38
Commandline: apt-get remove gnome-shell
Requested-By: caio (1000)
Remove: gnome-shell-extension-redshift:amd64 (3.20.1-2), ubuntu-session:amd64 (3.28.1-0ubuntu3), ubuntu-desktop:amd64 (1.417.5), gdm3:amd64 (3.28.3-0ubuntu18.04.6), gnome-shell:amd64 (3.28.4-0ubuntu18.04.3), gnome-shell-pomodoro:amd64 (0.13.4-2)
End-Date: 2021-01-04 20:24:12
Start-Date: 2021-01-04 20:31:14
Commandline: apt-get install gnome-shell
Requested-By: caio (1000)
Install: ubuntu-session:amd64 (3.28.1-0ubuntu3, automatic), gnome-user-guide:amd64 (3.28.2+git20180715-0ubuntu0.1, automatic), gnome-shell:amd64 (3.28.4-0ubuntu18.04.3)
End-Date: 2021-01-04 20:31:38
Start-Date: 2021-01-04 21:27:23
Commandline: /usr/bin/apt install mint-meta-xfce
Requested-By: caio (1000)
Install: xfce4-systemload-plugin:amd64 (1:1.2.1-0ubuntu1, automatic), xfce4-appfinder:amd64 (4.12.0-2ubuntu2, automatic), xubuntu-icon-theme:amd64 (18.04.5, automatic), libthunarx-2-0:amd64 (1.6.15-0ubuntu1.18.04.1, automatic), thunar-media-tags-plugin:amd64 (0.2.1-1, automatic), exo-utils:amd64 (0.12.2-0ubuntu0.18.04.1, automatic), thunar-data:amd64 (1.6.15-0ubuntu1.18.04.1, automatic), libgnomecanvas2-common:amd64 (2.30.3-3, automatic), libgnomeui-0:amd64 (2.24.5-3.2, automatic), xfce4-timer-plugin:amd64 (1.6.0-1build1, automatic), gtk2-engines-xfce:amd64 (3.2.0-3, automatic), libxfce4ui-common:amd64 (4.13.4-1ubuntu1, automatic), xfce4-screenshooter:amd64 (1.8.2-2, automatic), xfce4-mailwatch-plugin:amd64 (1.2.0-2ubuntu2, automatic), gir1.2-clutter-1.0:amd64 (1.26.2+dfsg-4, automatic), libtumbler-1-0:amd64 (0.2.1-0ubuntu1, automatic), libxfce4panel-2.0-4:amd64 (4.12.2-1ubuntu1mint2, automatic), xfce4-whiskermenu-plugin:amd64 (2.3.0-0ppa1~bionic, automatic), libxfce4util7:amd64 (4.12.1-3, automatic), gir1.2-cheese-3.0:amd64 (3.28.0-1ubuntu1, automatic), xfce4-time-out-plugin:amd64 (1.0.2-0ubuntu1, automatic), xfce4-settings:amd64 (4.12.4-0ubuntu0.18.04.1, automatic), mint-meta-xfce:amd64 (2018.11.28), libxfce4ui-1-0:amd64 (4.13.4-1ubuntu1, automatic), libexo-1-0:amd64 (0.12.2-0ubuntu0.18.04.1, automatic), libxfce4ui-2-0:amd64 (4.13.4-1ubuntu1, automatic), libbonobo2-common:amd64 (2.32.1-3, automatic), libexo-2-0:amd64 (0.12.2-0ubuntu0.18.04.1, automatic), xfce4-panel:amd64 (4.12.2-1ubuntu1mint2, automatic), thunar-volman:amd64 (0.8.1-2, automatic), xfwm4:amd64 (4.13.0-2~downgrade-4.12.5-1ubuntu0.18.04.1+tara, automatic), libbonoboui2-common:amd64 (2.24.5-4, automatic), thunar-archive-plugin:amd64 (0.3.1-4, automatic), gir1.2-cogl-1.0:amd64 (1.22.2-3ubuntu1, automatic), libgnomeui-common:amd64 (2.24.5-3.2, automatic), xfce4-eyes-plugin:amd64 (4.5.0-1, automatic), tumbler:amd64 (0.2.1-0ubuntu1, automatic), mugshot:amd64 (0.4.0-1, automatic), xfconf:amd64 (4.12.1-1, automatic), libexo-common:amd64 (0.12.2-0ubuntu0.18.04.1, automatic), libgnome-2-0:amd64 (2.32.1-6, automatic), thunar:amd64 (1.6.15-0ubuntu1.18.04.1, automatic), tumbler-common:amd64 (0.2.1-0ubuntu1, automatic), xfdesktop4:amd64 (4.12.3-4ubuntu2, automatic), libbonoboui2-0:amd64 (2.24.5-4, automatic), libxfce4util-bin:amd64 (4.12.1-3, automatic), gir1.2-coglpango-1.0:amd64 (1.22.2-3ubuntu1, automatic), xfce4-quicklauncher-plugin:amd64 (1.9.4-11build1, automatic), xfce4-verve-plugin:amd64 (1.1.0-1, automatic), libgnomevfs2-common:amd64 (1:2.24.4-6.1ubuntu2, automatic), xfce4-cpufreq-plugin:amd64 (1.1.3-1, automatic), xscreensaver:amd64 (5.36-1ubuntu1, automatic), libgarcon-common:amd64 (0.6.1-2linuxmint1, automatic), xfce4-screenshooter-plugin:amd64 (1.8.2-2, automatic), libtagc0:amd64 (1.11.1+dfsg.1-0.2build2, automatic), libgnomevfs2-0:amd64 (1:2.24.4-6.1ubuntu2, automatic), xfce4-session:amd64 (4.12.1-3ubuntu3, automatic), libxfce4util-common:amd64 (4.12.1-3, automatic), liborbit-2-0:amd64 (1:2.14.19-4, automatic), libgnomecanvas2-0:amd64 (2.30.3-3, automatic), libxfconf-0-2:amd64 (4.12.1-1, automatic), libbonobo2-0:amd64 (2.32.1-3, automatic), libxfcegui4-4:amd64 (4.10.0-4, automatic), xfce4-places-plugin:amd64 (1.7.0-3, automatic), xfdesktop4-data:amd64 (4.12.3-4ubuntu2, automatic), gir1.2-gtkclutter-1.0:amd64 (1.8.4-3, automatic), libgarcon-1-0:amd64 (0.6.1-2linuxmint1, automatic), libgnome2-common:amd64 (2.32.1-6, automatic), greybird-gtk-theme:amd64 (3.22.8-1, automatic), libexo-helpers:amd64 (0.12.2-0ubuntu0.18.04.1, automatic)
End-Date: 2021-01-04 21:31:09
Start-Date: 2021-01-04 21:38:39
Commandline: /usr/bin/apt autoremove
Requested-By: caio (1000)
Remove: libmono-system-numerics4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), linux-headers-4.15.0-126-generic:amd64 (4.15.0-126.129), linux-modules-4.15.0-126-generic:amd64 (4.15.0-126.129), libmono-system-runtime-serialization-formatters-soap4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), linux-image-4.15.0-126-generic:amd64 (4.15.0-126.129), bamfdaemon:amd64 (0.5.3+18.04.20180207.2-0ubuntu1), libmono-system-componentmodel-dataannotations4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-system-ldap4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-system-web-applicationservices4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libplank1:amd64 (0.11.4-2), libmono-system-enterpriseservices4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-system-data4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libgnome-keyring1.0-cil:amd64 (1.0.0-5), libmono-ldap4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), linux-modules-extra-4.15.0-126-generic:amd64 (4.15.0-126.129), libnotify0.4-cil:amd64 (0.4.0~r3032-7build1), libmono-data-tds4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libbamf3-2:amd64 (0.5.3+18.04.20180207.2-0ubuntu1), libmono-system-servicemodel-internals0.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-system-web4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-system-design4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-system-runtime-serialization4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-system-xml-linq4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-system-web-services4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), gnome-shell-pomodoro-data:amd64 (0.13.4-2), libmono-system-transactions4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), linux-headers-4.15.0-126:amd64 (4.15.0-126.129), libplank-common:amd64 (0.11.4-2), libmono-webbrowser4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-system-windows-forms4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-sqlite4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libmono-accessibility4.0-cil:amd64 (4.6.2.7+dfsg-1ubuntu1), libgkeyfile1.0-cil:amd64 (0.1-5)
End-Date: 2021-01-04 21:40:58
Start-Date: 2021-01-04 21:42:22
Commandline: apt-get install ubuntu-desktop --no-install-recommends
Requested-By: caio (1000)
Install: ubuntu-desktop:amd64 (1.417.5), gdm3:amd64 (3.28.3-0ubuntu18.04.6, automatic)
End-Date: 2021-01-04 21:42:42
Devo então apagar um por um os pacotes e rodar esse comando do lightdm, certo? Pior que quando apaguei de uma vez a DE, acho que cheguei a usar algo com lightdm e não acontecia nada.
Após deletar um por um os softwares do ubuntu, o que devo fazer?