Comment 0 for bug 1351376

Good evening
I notice a problem inside a guest virtualbox kubuntu 14.04.1 64bit edition; 3d does not work properly

glxinfo |head
libGL error: failed to authenticate magic 1
libGL error: failed to load driver: vboxvideo
name of display: :0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap,
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
    GLX_OML_swap_method, GLX_SGIS_multisample, GLX_SGIX_fbconfig,
    GLX_SGIX_pbuffer, GLX_SGI_make_current_read

virtualbox-guest-x11 and virtualbox-guest-dkms are already at latest version

please note that the old ubuntu 12.04.04 works pefectly
name of display: :0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: Chromium
server glx version string: 1.3 Chromium
server glx extensions:
    GLX_ARB_multisample, GLX_EXT_texture_from_pixmap, GLX_SGIX_fbconfig,
    GLX_ARB_get_proc_address
client glx vendor string: Chromium
client glx version string: 1.3 Chromium

as far as I know thi is a problem of the guest addition as you can read from the Vbox forum
https://www.virtualbox.org/ticket/12941

can you update the guest addition package?