A couple of months ago, xserver-common, xserver-xorg-core and xserver-xorg-legacy were upgraded from version 1.19.2 to 1.19.6 in Buster.
But since then, when starting X from the console, the process soon comes to a grinding halt. These are the last lines: (==) Log file: "/home/<user>/local/share/xorg/Xorg.0.log", Time: Tue Jun 12 16:18:18 2018 (==) Using config file: "/etc/X11/xorg.conf" (==) Using config directory: "/etc/X11/xorg.conf.d" (==) Using system config directory "/usr/share/X11/xorg.conf.d" When I downgrade the three packages back to 1.19.2, same as in Stretch, then X starts without problems. Now that 1.19.6 still does not work after a few months, what could be the reason? These are the last lines in the mentioned log file: [ 30.968] (EE) xf86OpenSerial: Cannot open device /dev/console Permission denied. [ 30.968] (II) console: opening input device '/dev/console' failed (Permission denied). [ 30.968] (II) console - failed to create input device '/dev/console'. [ 30.968] (EE) libinput: (unnamed): Failed to create a device for /dev/console [ 30.968] (EE) PreInit returned 2 for "(unnamed)" [ 30.968] (II) UnloadModule: "libinput" [ 30.968] (II) config/udev: Adding input device (unnamed) (/dev/ptmx) [ 30.968] (**) (unnamed): Applying InputClass "Logitech USB Laser Mouse" [ 30.968] (II) Using input driver 'libinput' for '(unnamed)' [ 30.969] (EE) systemd-logind: failed to take device /dev/ptmx: No such device [ 30.969] (**) (unnamed): always reports core events [ 30.969] (**) Option "Device" "/dev/ptmx" [ 30.969] (**) Option "_source" "server/udev"