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Well, as current I mean active Display of a XOrg Server. Remember that we can have more than one XOrg Server running and they can be multi-head, what make the things harder to manipulate. The other important note is that the DISPLAY variable in some cases cannot be accessed (eg. systemd). After some discussion in commandlinefu, I got this result: for p in ...


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You may try to use loginctl list-sessions to get the list of sessions, and then use loginctl show-session -p Display -p Active <session ID> on each of these to get the X11 display number associated with the currently active session. Something like this (in bash): TARGET_DISPLAY=() while read id uid user seat; do while IFS='=' read property value; ...


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You need to configure your gdm3 , PAM for autologin : Edit /etc/gdm/custom.conf file. # Enable automatic login for user [daemon] AutomaticLogin=username AutomaticLoginEnable=True Put the following pam configuration into /etc/pam.d/gdm-password: auth sufficient pam_succeed_if.so user ingroup nopasswdlogin Then create user and group nopasswdlogin.


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Jessie has been released as stabile now, and the answer to this question is included in official upgrade documentation: missing support of the EGL interface.



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