Public bug reported:
xfce4-session 4.12.1-3ubuntu1
xfce4-session determines which buttons to grey out on the logout dialogue box
by calling
polkit_check_authorization_sync for the action org.freedesktop.login1.reboot
etc.
However, if polkit policy permits these actions but denies
org.freedesktop.login1.reboot-multiple-sessions, and multiple users are
logged in, the restart button on the logout dialogue box will be enabled
even though the user isn't able to reboot the machine.
xfce4-session should instead use the CanReboot (etc.) methods on
systemd-logind, which will automatically correctly check the correct
polkit permissions.
I attach a patch to xfsm-systemd.c which works for me.
(S)
** Affects: xfce4-session (Ubuntu)
Importance: Undecided
Status: New
** Patch added: "Patch to xfsm-systemd.c"
https://bugs.launchpad.net/bugs/1724196/+attachment/4973461/+files/use-systemd-canreboot-etc
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https://bugs.launchpad.net/bugs/1724196
Title:
xfce4-session doesn't check for reboot correctly
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