My Ubuntu 16.04 system boots to X.Org failsafe mode (
xinit fails). I cannot find out why. The file
/var/log/Xorg.0.log contains the following:
/dev/dri/card0: No such file or directory
PS: My system was working fine until I removed 2 kernel images which were not being used (
4.4.0-59). I use
4.4.0-53. The boot process ends with
reached target graphical failsafe runlevel fallback and does not go further.