Comment 5 for bug 1613014

I don't save session before poweroff.
.xsession-errors contains:
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Xsession: X session started for mixtape at Сб окт 10 02:47:35 MSK 2015
localuser:mixtape being added to access control list
/usr/bin/x-session-manager: X server already running on display :0
xrdb: "Xft.hintstyle" on line 9 overrides entry on line 6
xrdb: "Xft.hinting" on line 10 overrides entry on line 5
xfce4-session-Message: SSH authentication agent is already running

(xfce4-session:1074): xfce4-session-WARNING **: xfsm_manager_load_session: Something wrong with /home/mixtape/.cache/sessions/xfce4-session-machine:0, Does it exist? Permissions issue?

** (nm-applet:1097): WARNING **: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files

** (polkit-gnome-authentication-agent-1:1115): WARNING **: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files
No systemtrayicon available
Произошла ошибка: Не удалось инициализировать модуль
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