为什么总是有一个僵死进程Xsession

jcase

如图:
求解!

.xsession-errors:
imsettings information
==========================
Is DBus enabled: yes
Is imsettings enabled: yes
Is GTK+ supported: yes
Is Qt supported: no
DESKTOP_SESSION: gnome
DISABLE_IMSETTINGS:
IMSETTINGS_DISABLE_DESKTOP_CHECK:
DBUS_SESSION_BUS_ADDRESS: unix:abstract=/tmp/dbus-wHJGwssaU0,guid=1752ea59809807ebb02c0f914934f641
GTK_IM_MODULE:
QT_IM_MODULE:
XMODIFIERS: @im=imsettings
IMSETTINGS_MODULE: none

Started none
gnome-session[3227]: WARNING: Unable to find provider 'compiz-gtk' of required component 'windowmanager'
I: caps.c: Limited capabilities successfully to CAP_SYS_NICE.
I: caps.c: Dropping root privileges.
I: caps.c: Limited capabilities successfully to CAP_SYS_NICE.

** (nautilus:3465): WARNING **: Unable to add monitor: Not supported
gnome-session[3227]: WARNING: Application 'libcanberra-login-sound.desktop' failed to register before timeout
I: caps.c: Limited capabilities successfully to CAP_SYS_NICE.
I: caps.c: Dropping root privileges.
I: caps.c: Limited capabilities successfully to CAP_SYS_NICE.
N: main.c: Called SUID root and real-time/high-priority scheduling was requested in the configuration. However, we lack the necessary privileges:
N: main.c: We are not in group 'pulse-rt' and PolicyKit refuse to grant us privileges. Dropping SUID again.
N: main.c: For enabling real-time scheduling please acquire the appropriate PolicyKit privileges, or become a member of 'pulse-rt', or increase the RLIMIT_NICE/RLIMIT_RTPRIO resource limits for this user.
W: main.c: High-priority scheduling enabled in configuration but not allowed by policy.
W: core-util.c: setpriority(): Permission denied
Acceleration key: disabled
*** Exiting...
XSETTINGS manager support is explicitly disabled.