I'm an ignorant on this, but, well... maybe somebody gets some info from this: Syslog things: Mar 26 22:54:21 UbuntuPruebasVirtual kernel: [ 5.247495] audit: type=1400 audit(1427406860.403:2): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/lightdm/lightdm-guest-session" pid=595 comm="apparmor_parser" Mar 26 22:54:22 UbuntuPruebasVirtual lightdm[952]: Failed to use bus name org.freedesktop.DisplayManager, do you have appropriate permissions? Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: lightdm.service: main process exited, code=exited, status=1/FAILURE Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Unit lightdm.service entered failed state. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: lightdm.service failed. Mar 26 22:54:22 UbuntuPruebasVirtual colord[940]: (colord:940): Cd-WARNING **: failed to get session [pid 840]: Error desconocido -2 Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: lightdm.service holdoff time over, scheduling restart. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Started Cgroup management proxy. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Starting Restore /etc/resolv.conf if the system crashed before the ppp link was shut down.... Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Starting Light Display Manager... Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Started Read required files in advance. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Started Restore /etc/resolv.conf if the system crashed before the ppp link was shut down.. Mar 26 22:54:22 UbuntuPruebasVirtual lightdm[1040]: Failed to use bus name org.freedesktop.DisplayManager, do you have appropriate permissions? Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: lightdm.service: main process exited, code=exited, status=1/FAILURE Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Failed to start Light Display Manager. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Dependency failed for Graphical Interface. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Job graphical.target/start failed with result 'dependency'. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Triggering OnFailure= dependencies of graphical.target. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Unit lightdm.service entered failed state. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: lightdm.service failed. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Started Stop ureadahead data collection 45s after completed startup. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Starting Terminate Plymouth Boot Screen... Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Started Cgroup management proxy. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Starting Restore /etc/resolv.conf if the system crashed before the ppp link was shut down.... Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Started Restore /etc/resolv.conf if the system crashed before the ppp link was shut down.. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Received SIGRTMIN+21 from PID 251 (plymouthd). Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Started Wait for Plymouth Boot Screen to Quit. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Started Terminate Plymouth Boot Screen. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Started X.org diagnosis failsafe. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Starting X.org diagnosis failsafe... Mar 26 22:54:22 UbuntuPruebasVirtual colord-sane: [bjnp] create_broadcast_socket: bind socket to local address failed - Cannot assign requested address Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: lightdm.service holdoff time over, scheduling restart. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Requested transaction contradicts existing jobs: Transaction is destructive. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: lightdm.service failed to schedule restart job: Transaction is destructive. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Unit lightdm.service entered failed state. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: lightdm.service failed. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Created slice user-115.slice. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Starting user-115.slice. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Starting User Manager for UID 115... Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Started Session 1 of user sddm. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1]: Starting Session 1 of user sddm. Mar 26 22:54:22 UbuntuPruebasVirtual systemd[1071]: Unit type .busname is not supported on this system. and Xorg log: [ 6.308] (II) Loading sub module "dri2" [ 6.308] (II) LoadModule: "dri2" [ 6.308] (II) Module "dri2" already built-in [ 6.308] (II) UnloadModule: "modesetting" [ 6.308] (II) Unloading modesetting [ 6.308] (II) UnloadModule: "fbdev" [ 6.308] (II) Unloading fbdev [ 6.308] (II) UnloadSubModule: "fbdevhw" [ 6.308] (II) Unloading fbdevhw [ 6.309] (II) UnloadModule: "vesa" [ 6.309] (II) Unloading vesa [ 6.309] (==) Depth 24 pixmap format is 32 bpp [ 6.309] (II) vmware(0): Initialized VMWARE_CTRL extension version 0.2 [ 6.311] (II) vmware(0): Gallium3D XA version: 2.2.0. [ 6.311] (II) vmware(0): Path of drm device is "/dev/dri/card0". [ 6.311] (II) vmware(0): [DRI2] Setup complete [ 6.311] (II) vmware(0): [DRI2] DRI driver: vmwgfx [ 6.311] (--) vmware(0): Render acceleration is enabled. [ 6.311] (==) vmware(0): Rendercheck mode is disabled. [ 6.311] (--) vmware(0): Direct rendering (3D) is enabled. [ 6.311] (==) vmware(0): Direct presents are disabled. [ 6.311] (==) vmware(0): Hardware only presents are disabled. [ 6.311] (==) vmware(0): Backing store enabled [ 6.311] (==) vmware(0): Silken mouse enabled [ 6.311] (II) vmware(0): RandR 1.2 enabled, ignore the following RandR disabled message. [ 6.311] (==) vmware(0): DPMS enabled [ 6.311] (--) RandR disabled [ 6.315] (II) SELinux: Disabled on system [ 6.318] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer [ 6.318] (II) AIGLX: enabled GLX_ARB_create_context [ 6.318] (II) AIGLX: enabled GLX_ARB_create_context_profile [ 6.318] (II) AIGLX: enabled GLX_EXT_create_context_es2_profile [ 6.318] (II) AIGLX: enabled GLX_EXT_framebuffer_sRGB [ 6.318] (II) AIGLX: enabled GLX_ARB_fbconfig_float [ 6.318] (II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects [ 6.318] (II) AIGLX: Loaded and initialized vmwgfx [ 6.318] (II) GLX: Initialized DRI2 GL provider for screen 0 [ 6.318] (EE) Fatal server error: [ 6.318] (EE) failed to create screen resources(EE) [ 6.318] (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 6.318] (EE) Please also check the log file at "/var/log/Xorg.1.log" for additional information. [ 6.319] (EE) [ 6.319] (II) AIGLX: Suspending AIGLX clients for VT switch [ 6.319] (WW) vmware(0): drmDropMaster failed: Invalid argument