I had similar issues where the upgrade from 16.04 to 18.04 resulted in blank screen, The key to finding the problems was reviewing the errors in the file /var/log/syslog
gnome-session[2851]: X Error of failed request: BadValue (integer parameter out of range for operation) gnome-session[2851]: Major opcode of failed request: 154 (GLX) gnome-session[2851]: Minor opcode of failed request: 3 (X_GLXCreateContext) gnome-session[2851]: Value in failed request: 0x0 gnome-session[2851]: Serial number of failed request: 19 gnome-session[2851]: Current serial number in output stream: 20 gnome-session[2851]: gnome-session-check-accelerated: GL Helper exited with code 256 gnome-session-c[2979]: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-4UdC671MtT: Connection refused gnome-session-c[2979]: eglGetDisplay() failed gnome-session[2851]: gnome-session-check-accelerated: GLES Helper exited with code 256 gnome-session-c[2980]: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-4UdC671MtT: Connection refused gnome-session[2851]: X Error of failed request: BadValue (integer parameter out of range for operation) gnome-session[2851]: Major opcode of failed request: 154 (GLX) gnome-session[2851]: Minor opcode of failed request: 3 (X_GLXCreateContext) gnome-session[2851]: Value in failed request: 0x0 gnome-session[2851]: Serial number of failed request: 19 gnome-session[2851]: Current serial number in output stream: 20 gnome-session[2851]: gnome-session-check-accelerated: GL Helper exited with code 256 The solution was found in the outline in the link below, to remove the nvidia drivers. I was surprised this was the solution as my system ran on intel integrated gpu. However its hard to know how things precipitate till they do. https://www.osso.nl/blog/ubuntu-bionic-crashing-gdm-eglgetdisplay/ First I changed the display manager to lightdm. $ sudo apt-get install lightdm $ sudo dpkg-reconfigure lightdm to select lightdm as the default desktop manager Then the login screen came up. However , I entered the famous ubuntu login loop , where upon successful login to the system resulted into the same greeter screen again instead of navigating into the desktop. $ dpkg -l | grep nvidia $ sudo apt-get remove --purge nvidia-*** Voila, the system starts again as before . I also had issues with the gnome themes, which cause the menus and window title bars to disappear. I had to install the gnome "tweaks" program to select the right theme and things were back. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1779476 Title: Ubuntu 18.04: gdm3 does not switch to graphics after update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1779476/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
