Eu fiz os upgrades normais do Ubuntu, adicionei estas linhas aos comandos startup-applications: sudo aticonfig --px-igpu e sudo tlp start na última inicialização de trabalho. Estas podem ser uma das causas, mas não tenho certeza.
Só consigo inicializar no modo de recuperação e isso não se conecta automaticamente ao meu Wi-Fi, mesmo depois de ativar a rede, por isso não consigo instalar novos pacotes da Internet.
Eu tentei remover o fglrx, mas ele mostra que ele não está instalado, mas tenho certeza de que instalei os drivers AMD no site oficial e o comando aticonfig funciona mesmo no modo de recuperação.
Eu estou anexando o log do lightdm.
[+0.04s] DEBUG: Logging to /var/log/lightdm/lightdm.log [+0.04s] DEBUG: Starting Light Display Manager 1.16.7, UID=0 PID=807 [+0.04s] DEBUG: Loading configuration dirs from /usr/share/lightdm/lightdm.conf.d [+0.04s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/40-kde-plasma-kf5.conf [+0.04s] DEBUG: [SeatDefaults] is now called [Seat:*], please update this configuration [+0.04s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-greeter-wrapper.conf [+0.04s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-guest-wrapper.conf [+0.04s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf [+0.04s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-unity-greeter.conf [+0.04s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-xserver-command.conf [+0.04s] DEBUG: Loading configuration dirs from /usr/local/share/lightdm/lightdm.conf.d [+0.04s] DEBUG: Loading configuration dirs from /etc/xdg/lightdm/lightdm.conf.d [+0.04s] DEBUG: Loading configuration from /etc/lightdm/lightdm.conf [+0.04s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager [+0.04s] DEBUG: Registered seat module xlocal [+0.04s] DEBUG: Registered seat module xremote [+0.04s] DEBUG: Registered seat module unity [+0.05s] DEBUG: Monitoring logind for seats [+0.05s] DEBUG: New seat added from logind: seat0 [+0.05s] DEBUG: Seat seat0: Loading properties from config section Seat:* [+0.05s] DEBUG: Seat seat0: Starting [+0.05s] DEBUG: Seat seat0: Creating greeter session [+0.06s] DEBUG: Seat seat0: Creating display server of type x [+0.07s] DEBUG: Quitting Plymouth [+0.09s] DEBUG: Using VT 7 [+0.09s] DEBUG: Seat seat0: Starting local X display on VT 7 [+0.09s] DEBUG: DisplayServer x-0: Logging to /var/log/lightdm/x-0.log [+0.09s] DEBUG: DisplayServer x-0: Writing X server authority to /var/run/lightdm/root/:0 [+0.09s] DEBUG: DisplayServer x-0: Launching X Server [+0.10s] DEBUG: Launching process 817: /usr/bin/X -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch [+0.10s] DEBUG: DisplayServer x-0: Waiting for ready signal from X server :0 [+0.10s] DEBUG: Acquired bus name org.freedesktop.DisplayManager [+0.10s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat0 [+0.50s] DEBUG: Loading users from org.freedesktop.Accounts [+0.50s] DEBUG: User /org/freedesktop/Accounts/User1000 added [+1.39s] DEBUG: Process 817 terminated with signal 6 [+1.39s] DEBUG: DisplayServer x-0: X server stopped [+1.39s] DEBUG: Releasing VT 7 [+1.39s] DEBUG: DisplayServer x-0: Removing X server authority /var/run/lightdm/root/:0 [+1.39s] DEBUG: Seat seat0: Display server stopped [+1.39s] DEBUG: Seat seat0: Stopping; greeter display server failed to start [+1.40s] DEBUG: Seat seat0: Stopping [+1.40s] DEBUG: Seat seat0: Stopping session [+1.40s] DEBUG: Seat seat0: Session stopped [+1.40s] DEBUG: Seat seat0: Stopped [+1.40s] DEBUG: Required seat has stopped [+1.40s] DEBUG: Stopping display manager [+1.40s] DEBUG: Display manager stopped [+1.40s] DEBUG: Stopping daemon [+1.40s] DEBUG: Seat seat0: Stopping session [+1.40s] DEBUG: Exiting with return value 1