Sempre que a tela é bloqueada (por menu ou alternando usuários), um amigo de bug aparece dizendo que o protetor de tela caiu, então a sessão inteira congela e não pode fazer nada. Deve ser eliminado com ctrl + alt + backspace.
Quando o painel de controle do protetor de tela é aberto, o mesmo erro ocorre, mas ele não congela e eu posso salvá-lo.
System: Linux 2.6.38-8-generic-pae #42-Ubuntu SMP Mon Apr 11 05:17:09 UTC 2011 i686 X Vendor: The X.Org Foundation X Vendor Release: 11001000 Selinux: No Accessibility: Disabled GTK+ Theme: Human Icon Theme: Humanity GTK+ Modules: gnomesegvhandler, canberra-gtk-module Memory status: size: 20008960 vsize: 20008960 resident: 6086656 share: 4497408 rss: 6086656 rss_rlim: 18446744073709551615 CPU usage: start_time: 1304204561 rtime: 1 utime: 1 stime: 0 cutime:0 cstime: 0 timeout: 0 it_real_value: 0 frequency: 100 ----------- .xsession-errors --------------------- ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged ** (gnome-session:26986): DEBUG: GsmDBusClient: obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameOwnerChanged --------------------------------------------------
Isso significa que qualquer pessoa que usar esse computador precisará efetuar logout antes que qualquer outra pessoa possa fazer login. Esse é um problema sério. Definir o protetor de tela para "tela em branco" não resolve o problema.