I upgraded to Ubuntu 20.04 via do-release-upgrade -d. From the terminal everything looked fine. However, when I reboot my desktop again, I found that it's a broken upgrade, icons are lost, some apps like nautilus can't launch, etc.

I ran apt update and it shows 357 packages can be upgraded. but when I did apt upgrade -y

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Calculating upgrade... Done

The following packages were automatically installed and are no longer required:

  gir1.2-appindicator3-0.1 libice6:i386 libsm6:i386 libxt6:i386 python-notify

Use 'sudo apt autoremove' to remove them.

The following packages have been kept back:

  appstream blender blender-data colord compizconfig-settings-manager cpp-7

  cups cups-bsd cups-client cups-core-drivers cups-daemon cups-filters

  cups-filters-core-drivers cups-ipp-utils cups-ppdc dash deja-dup dpkg

  evolution-data-server fcitx-frontend-qt5 fcitx-modules fontforge

  fontforge-common fwupd fwupd-signed fwupdate gcc-7 gcc-7-base gcc-7-multilib

  gcc-8-base gcc-8-base:i386 gdal-data ghostscript ghostscript-x

  gir1.2-freedesktop gir1.2-glib-2.0 gir1.2-gnomedesktop-3.0

  gir1.2-gst-plugins-base-1.0 gir1.2-gtk-3.0 gir1.2-ibus-1.0 gir1.2-pango-1.0

  gir1.2-polkit-1.0 gir1.2-rb-3.0 gir1.2-soup-2.4 gjs glib-networking

  glib-networking-services gnome-calendar gnome-control-center

  gnome-control-center-data gnome-initial-setup gnome-power-manager

  gnome-session-bin gnome-session-common gnome-settings-daemon gnome-shell

  gnome-shell-common gnome-shell-extension-appindicator

  gnome-shell-extension-ubuntu-dock gnome-software gnome-software-common

  gnome-software-plugin-snap gnome-startup-applications gnome-tweaks

  gnuplot-data gnuplot-qt gparted gsettings-desktop-schemas gstreamer1.0-alsa

  gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-libav

  gstreamer1.0-plugins-base gstreamer1.0-plugins-base:i386

  gstreamer1.0-plugins-good gstreamer1.0-plugins-ugly gstreamer1.0-pulseaudio

  gstreamer1.0-vaapi gstreamer1.0-x gtk-update-icon-cache gvfs gvfs-backends

  gvfs-bin gvfs-common gvfs-daemons gvfs-fuse gvfs-libs hplip hplip-data ibus

  ibus-gtk ibus-gtk3 lib32asan4 lib32cilkrts5 lib32gcc-7-dev lib32mpx2

  lib32ubsan0 libalgorithm-diff-xs-perl libappstream-glib8 libappstream4

  libapt-pkg-perl libasan4 libcairo-gobject-perl libcairo-perl libcilkrts5

  libclone-perl libcups2 libcups2:i386 libcupsimage2 libdazzle-1.0-0

  libebackend-1.2-10 libegl-mesa0 libfcgi-perl libfcitx-qt5-1

  libfile-fcntllock-perl libgail-3-0 libgail-common libgail-common:i386

  libgail18 libgail18:i386 libgbm1 libgcab-1.0-0 libgcc-7-dev libgcc1

  libgcc1:i386 libgfortran4 libgirepository-1.0-1 libgjs0g libgl1-mesa-dri

  libgl1-mesa-dri:i386 libglapi-mesa libglapi-mesa:i386

  libglib-object-introspection-perl libglib-perl libglib2.0-0

  libglib2.0-0:i386 libglib2.0-bin libglib2.0-dev libglib2.0-dev-bin

  libglibmm-2.4-1v5 libglx-mesa0 libglx-mesa0:i386 libgs9 libgs9-common

  libgstreamer-plugins-bad1.0-0 libgstreamer-plugins-base1.0-0

  libgstreamer-plugins-base1.0-0:i386 libgstreamer-plugins-good1.0-0

  libgtk-3-0 libgtk-3-bin libgtk2.0-0 libgtk2.0-0:i386 libgtk2.0-bin

  libgtkmm-2.4-1v5 libgtkmm-3.0-1v5 libhpmud0 libhtml-parser-perl

  libhttp-date-perl libhttp-message-perl libibus-1.0-5 libio-pty-perl

  libio-socket-ssl-perl libjavascriptcoregtk-4.0-18 liblist-moreutils-perl

  liblocale-gettext-perl libmpx2 libnautilus-extension1a libnet-dbus-perl

  libnet-dns-perl libnet-libidn-perl libnet-ssleay-perl libosmesa6

  libosmesa6:i386 libpango-1.0-0 libpango-1.0-0:i386 libpangocairo-1.0-0

  libpangocairo-1.0-0:i386 libpangoft2-1.0-0 libpangoft2-1.0-0:i386

  libpangomm-1.4-1v5 libpangoxft-1.0-0 libperlio-gzip-perl

  libplexus-utils2-java libpolkit-agent-1-0 libpolkit-gobject-1-0

  libpython-all-dev libpython3-dev libpython3-stdlib libqt5concurrent5

  libqt5core5a libqt5dbus5 libqt5gui5 libqt5network5 libqt5opengl5

  libqt5opengl5-dev libqt5printsupport5 libqt5qml5 libqt5quick5

  libqt5quickcontrols2-5 libqt5quicktemplates2-5 libqt5sql5 libqt5sql5-sqlite

  libqt5svg5 libqt5test5 libqt5widgets5 libqt5x11extras5 libqt5xml5

  libreoffice-avmedia-backend-gstreamer libreoffice-base-core

  libreoffice-common libreoffice-core libreoffice-gnome libreoffice-gtk3

  libreoffice-l10n-en-za libreoffice-l10n-zh-cn libreoffice-math

  libreoffice-style-breeze libreoffice-style-galaxy libreoffice-style-tango

  librhythmbox-core10 libsane-common libsane-hpaio libsane1 libsane1:i386

  libsmbclient libsocket6-perl libsoup-gnome2.4-1 libsoup2.4-1 libstdc++-7-dev

  libsub-name-perl libtdb1 libtdb1:i386 libtext-charwidth-perl

  libtext-iconv-perl libubsan0 libvlc-bin libvlc5 libwbclient0

  libwebkit2gtk-4.0-37 libwine libwine:i386 libwww-perl libx32asan4

  libx32cilkrts5 libx32gcc-7-dev libx32ubsan0 libxml-libxml-perl

  libxml-parser-perl libyaml-libyaml-perl lintian lm-sensors mutter nautilus

  nautilus-data octave octave-common orca pavucontrol pdfshuffler perl

  perl-base playonlinux policykit-1 printer-driver-brlaser

  printer-driver-gutenprint printer-driver-hpcups printer-driver-postscript-hp

  python-all python-all-dev python-asn1crypto python-cairo python-cffi-backend

  python-crypto python-cryptography python-dbus python-enum34 python-gobject-2

  python-idna python-ipaddress python-keyring python-pip-whl

  python-pkg-resources python-pypdf2 python-setuptools python-six python-tk

  python-wxgtk3.0 python-wxversion python-xdg python3 python3-apt

  python3-brlapi python3-cairo python3-cffi-backend python3-crypto

  python3-cups python3-dbus python3-dev python3-distutils python3-evdev

  python3-gdbm python3-gi python3-gi-cairo python3-lib2to3 python3-markupsafe

  python3-minimal python3-netifaces python3-pil python3-pip python3-protobuf

  python3-renderpm python3-reportlab python3-reportlab-accel

  python3-setproctitle python3-simplejson python3-systemd python3-uno

  python3-venv python3-yaml python3-zope.interface qml-module-qt-labs-settings

  qml-module-qtgraphicaleffects qml-module-qtquick-controls2

  qml-module-qtquick-layouts qml-module-qtquick-templates2

  qml-module-qtquick-window2 qml-module-qtquick2 qt5-gtk-platformtheme

  qt5-qmake qt5-qmake-bin qtbase5-dev qtbase5-dev-tools rhythmbox

  rhythmbox-plugins samba-common samba-common-bin samba-libs sane-utils

  texinfo ubuntu-session ubuntu-software unattended-upgrades ure vlc vlc-bin

  vlc-data vlc-plugin-base vlc-plugin-qt vlc-plugin-skins2

  vlc-plugin-video-output winbind wine-stable wine32:i386 wine64 winetricks

  xdg-desktop-portal xdg-desktop-portal-gtk

0 upgraded, 0 newly installed, 0 to remove and 357 not upgraded.

Basically, the system didn't allow me to upgrade.
When I tried to install some of these manually, the most common problem it returns is

The following packages have unmet dependencies:

 gsettings-desktop-schemas : Breaks: mutter (< 3.31.4) but 3.28.4-0ubuntu18.04.2 is to be installed

 libreoffice-common : Breaks: libreoffice-core (< 1:6.4.2~rc1) but 1:6.0.7-0ubuntu0.18.04.10 is to be installed

                      Recommends: python3-uno (>= 4.4.0~beta2) but it is not going to be installed

E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

So it's defi something wrong with the dependencies, but I yet don't know how to fix.

Here is my update log where errors are found

$ cat /var/log/dist-upgrade/apt.log|grep error

  MarkInstall libgpg-error0:amd64 < 1.27-6 -> 1.37-1 @ii umU IPb > FU=0

  new important dependency: libgpg-error-l10n:amd64

  Installing libgpg-error-l10n as Recommends of libgpg-error0

    MarkInstall libgpg-error-l10n:amd64 < none -> 1.37-1 @un uN > FU=0