Package: xorg I upgraded a system from jessie to stretch. It is a kiosk system without a window manager that starts one single application directly via startx. The dedicated user could not start the session after the upgrade.
With Debian jessie, there were no problems. I got these errors: Fatal server error:(EE) xf86OpenConsole: Cannot open virtual console 1 (Permission denied)(EE)(EE)Please consult the The X.Org Foundation support at http://wiki.x.org[1] The solution was to issue this command: chmod ug+s /usr/lib/xorg/Xorg I found it in a related Ubuntu bug report: https://bugs.launchpad.net/ubuntu/+source/xinit/+bug/1562219 Regards Eggert -------- [1] http://wiki.x.org