Eu instalei o Ubuntu 16.04 no meu laptop yoga da lenovo. Está funcionando bem. Mas o problema é que não está inicializando na primeira tentativa. depois de 2 a 3 tentativas tentando sua inicialização.
Corri sudo apt-get -qq upgrade do terminal e recebi a seguinte mensagem:
WARNING: The following packages cannot be authenticated!
base-files bsdutils init-system-helpers init util-linux mount libc6-dev
libc-dev-bin libc6-dbg libc6 locales libc-bin libapt-pkg5.0 libapt-inst2.0
apt apt-utils dbus-x11 dbus libdbus-1-3 libapparmor1 libuuid1 libblkid1
libprocps4 procps libsystemd0 libpam-systemd xserver-common
libwayland-egl1-mesa libegl1-mesa libgl1-mesa-dri xserver-xorg-core ifupdown
systemd udev libudev1 klibc-utils initramfs-tools initramfs-tools-core
initramfs-tools-bin libklibc systemd-sysv libdrm2 libgbm1 libdrm-amdgpu1
libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libllvm3.8 libmount1
libapparmor-perl apparmor im-config language-selector-gnome accountsservice
libaccountsservice0 language-selector-common uuid-runtime xdg-utils grub-pc
grub-pc-bin grub2-common fuse libfuse2 grub-common libk5crypto3
libgssapi-krb5-2 libkrb5-3 libkrb5support0 lightdm libpulsedsp
pulseaudio-utils pulseaudio-module-bluetooth pulseaudio-module-x11
pulseaudio libpulse-mainloop-glib0 libpulse0 ubuntu-drivers-common
ubuntu-release-upgrader-gtk ubuntu-release-upgrader-core python3-distupgrade
update-manager update-manager-core python3-update-manager update-notifier
update-notifier-common whoopsie libwhoopsie0 libfdisk1 libsmartcols1
multiarch-support distro-info-data isc-dhcp-client isc-dhcp-common kbd less
p11-kit-modules libp11-kit0 sudo apt-transport-https krb5-locales
python3-problem-report python3-apport apport apport-gtk
gir1.2-dbusmenu-glib-0.4 libdbusmenu-glib4 libdbusmenu-gtk3-4 bamfdaemon
libbamf3-2 libcompizconfig0 compiz-gnome compiz-plugins-default
libdecoration0 libmetacity-private3a metacity-common
gnome-settings-daemon-schemas compiz-core compiz cups-browsed
libcupsfilters1 libpoppler58 poppler-utils cups-filters-core-drivers
libfontembed1 cups-filters libnautilus-extension1a deja-dup
libappstream-glib8 libdfu1 libfwupd1 fwupd gnome-calculator gnome-calendar
gnome-font-viewer vino gnome-session-bin ubuntu-session gnome-session-common
gnome-sudoku gnome-system-monitor gtk2-engines-murrine libdbusmenu-gtk4
libfcitx-utils0 libfcitx-config4 libfcitx-gclient0 libframe6
libgweather-common libgweather-3-6 liblightdm-gobject-1-0 libnm-util2
libnm-glib-vpn1 libnm-glib4 libnm-gtk0 libnm-gtk-common libnm0
network-manager network-manager-gnome libnma0 libnma-common libpoppler-glib8
libqt5core5a libqt5dbus5 libqt5network5 libqt5gui5 libqt5widgets5
libqt5opengl5 libqt5printsupport5 libqt5sql5 libqt5sql5-sqlite libqt5test5
libqt5xml5 unity libunity-core-6.0-9 unity-schemas unity-services
libxatracker2 ubuntu-mono light-themes linux-firmware mtools nautilus-data
nautilus overlay-scrollbar-gtk2 overlay-scrollbar software-properties-common
software-properties-gtk python3-software-properties ubuntu-mobile-icons
suru-icon-theme ubuntu-artwork unattended-upgrades xdiagnose
xserver-xorg-video-intel p11-kit
E: There were unauthenticated packages and -y was used without --allow-unauthenticated