Every time I log into Xubuntu's Xfce, using LightDM I can see the following log lines in /var/log/lightdm/seat0-greeter.log
The configuration was not changed significantly, except for lightdm-gtk- greeter-settings, in which I chose theme Adwaita-dark and icons elementary-xfce-dark. ** Message: 22:15:21.895: Starting lightdm-gtk-greeter 2.0.5 (Mar 20 2018, 09:53:31) ** Message: 22:15:21.896: [Configuration] Reading file: /usr/share/lightdm/lightdm-gtk-greeter.conf.d/01_ubuntu.conf ** Message: 22:15:21.896: [Configuration] Reading file: /usr/share/lightdm/lightdm-gtk-greeter.conf.d/30_xubuntu.conf ** Message: 22:15:21.896: [Configuration] Reading file: /etc/lightdm/lightdm-gtk-greeter.conf ** (lightdm-gtk-greeter:3030): WARNING **: 22:15:22.155: [PIDs] Failed to execute command: upstart (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:22.401: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.215: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.240: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.290: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.306: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.323: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.341: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.356: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.374: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.391: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.408: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.424: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.441: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.457: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.474: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.491: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.507: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.523: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.540: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.557: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.574: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.675: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.692: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.708: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.724: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.742: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.759: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.775: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.791: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.807: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.825: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.841: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:30.858: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:35.411: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:3030): Gtk-WARNING **: 22:15:35.424: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) Gdk-Message: 22:15:35.639: lightdm-gtk-greeter: Fatal IO error 11 (Resource temporarily unavailable) on X server :1. -- You received this bug notification because you are a member of LightDM Gtk+ Greeter Development Team, which is subscribed to lightdm-gtk- greeter in Ubuntu. https://bugs.launchpad.net/bugs/1635809 Title: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) Status in lightdm-gtk-greeter package in Ubuntu: Confirmed Bug description: Greeter log contains these lines: (lightdm-gtk-greeter:3607): Gtk-WARNING **: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) I am writing, because I don't see any language switched on greeter screen. Maybe that's the reason. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter/+bug/1635809/+subscriptions -- Mailing list: https://launchpad.net/~lightdm-gtk-greeter-team Post to : [email protected] Unsubscribe : https://launchpad.net/~lightdm-gtk-greeter-team More help : https://help.launchpad.net/ListHelp

