Login-Sound does not work on Build 125 for my installation

I had already a problem posted here.
Now looking into
/usr/share/gnome/autostart/libcanberra-login-sound.desktop

Here was /usr/bin/amd64/canberra-gtk-play inserted. For my system this
is wrong, because I've a 32-Bit system.

Changing this to /usr/bin/canberra-gtk-play was on the command line also
not successfully, because as truss showed, it opened the /dev/dsp device and
wrote the sound file there, but it stucks there.

Here's the truss excerpt:
open64("/usr/share//sounds/freedesktop/stereo/desktop-login.ogg", O_RDONLY) = 9

....
open64("/dev/dsp", O_WRONLY|O_NONBLOCK)     = 10
....
/2: write(10, "\0\006\001\003\001\0FDFF".., 2304)   = 2304                     
/2: pollsys(0xCD4FEFA0, 2, 0x00000000, 0x00000000)  = 1
/2: brk(0x08125ED0)                 = 0
/2: brk(0x08125ED0)                 = 0
/2: brk(0x08129ED0)                 = 0
/1: pollsys(0x080C4120, 2, 0x00000000, 0x00000000) (sleeping...)
/2: write(10, 0x0810B698, 4096) (sleeping...)