This happened various times now on this laptop:

#4  0x40007c5c in do_lookup_x () from /lib/ld-linux.so.2
#5  0x40007fd7 in _dl_lookup_symbol_x () from /lib/ld-linux.so.2
#6  0x4000b4f1 in fixup () from /lib/ld-linux.so.2
#7  0x4000b2c0 in _dl_runtime_resolve () from /lib/ld-linux.so.2
#8  0x418c62db in server_job (dmix=0x81a70c8) at pcm_direct.c:323
#9  0x418c68ea in snd_pcm_direct_server_create (dmix=0x81a70c8)
    at pcm_direct.c:389
#10 0x418c90a5 in snd_pcm_dmix_open (pcmp=0xbfdba004, name=0x0, ipc_key=0, 
    ipc_perm=0, ipc_gid=0, params=0x0, bindings=0x0, slowptr=0, root=0x0, 
    sconf=0x0, stream=SND_PCM_STREAM_PLAYBACK, mode=1) at pcm_dmix.c:838
#11 0x418c96a4 in _snd_pcm_dmix_open (pcmp=0x0, name=0x0, root=0x813a228, 
    conf=0x8176bf8, stream=SND_PCM_STREAM_PLAYBACK, mode=0) at pcm_dmix.c:1184
#12 0x41890344 in snd_pcm_open_conf (pcmp=0xbfdba004, name=0x81a0c28 "dmix:0", 
    pcm_root=0x813a228, pcm_conf=0x8176bf8, stream=SND_PCM_STREAM_PLAYBACK, 
    mode=0) at pcm.c:2065
#13 0x418909f6 in snd_pcm_open_noupdate (pcmp=0xbfdba004, root=0x813a228, 
    name=0x81a0c28 "dmix:0", stream=SND_PCM_STREAM_PLAYBACK, mode=0)
    at pcm.c:2097
#14 0x41890c8b in snd_pcm_open_slave (pcmp=0xbfdba004, root=0x813a228, 
    conf=0x81a6ce8, stream=SND_PCM_STREAM_PLAYBACK, mode=1) at pcm.c:2181
#15 0x418d039f in _snd_pcm_softvol_open (pcmp=0x0, name=0x0, root=0x813a228, 
    conf=0x813b458, stream=SND_PCM_STREAM_PLAYBACK, mode=0)
    at pcm_softvol.c:811
#16 0x41890344 in snd_pcm_open_conf (pcmp=0xbfdba178, name=0x0, 
    pcm_root=0x813a228, pcm_conf=0x813b458, stream=SND_PCM_STREAM_PLAYBACK, 
    mode=0) at pcm.c:2065
#17 0x41890cb3 in snd_pcm_open_slave (pcmp=0xbfdba178, root=0x813a228, 
    conf=0x813b458, stream=SND_PCM_STREAM_PLAYBACK, mode=1) at pcm.c:2182
#18 0x418b0b75 in _snd_pcm_plug_open (pcmp=0x0, name=0x0, root=0x813a228, 
    conf=0x81a29c8, stream=SND_PCM_STREAM_PLAYBACK, mode=0) at pcm_plug.c:1159
#19 0x41890344 in snd_pcm_open_conf (pcmp=0x81294e0, name=0x0, 
    pcm_root=0x813a228, pcm_conf=0x81a29c8, stream=SND_PCM_STREAM_PLAYBACK, 
    mode=0) at pcm.c:2065
#20 0x41890cb3 in snd_pcm_open_slave (pcmp=0x81294e0, root=0x813a228, 
    conf=0x81a29c8, stream=SND_PCM_STREAM_PLAYBACK, mode=1) at pcm.c:2182
#21 0x418cde44 in _snd_pcm_asym_open (pcmp=0x0, name=0x41605a19 "default", 
    root=0x813a228, conf=0x8129ca0, stream=SND_PCM_STREAM_PLAYBACK, mode=0)
    at pcm_asym.c:112
#22 0x41890344 in snd_pcm_open_conf (pcmp=0x81294e0, 
    name=0x41605a19 "default", pcm_root=0x813a228, pcm_conf=0x8129ca0, 
    stream=SND_PCM_STREAM_PLAYBACK, mode=0) at pcm.c:2065
#23 0x418909f6 in snd_pcm_open_noupdate (pcmp=0x81294e0, root=0x813a228, 
    name=0x41605a19 "default", stream=SND_PCM_STREAM_PLAYBACK, mode=0)
    at pcm.c:2097
#24 0x4160472e in aKode::ALSASink::open ()
   from /opt/kde3/lib/libakode_alsa_sink.so
#25 0x41831da9 in aKode::AutoSink::open () from /opt/kde3/lib/libakode.so.1
#26 0x41836aa2 in aKode::Player::open () from /opt/kde3/lib/libakode.so.1
#27 0x415f7808 in KDE::Multimedia::aKodePlayer::aKodePlayer ()
   from /opt/kde3/lib/kde3/kdemm_akode.so
#28 0x415f842a in KDE::Multimedia::aKodeBackend::createPlayer ()
   from /opt/kde3/lib/kde3/kdemm_akode.so
#29 0x4161f369 in KDE::Multimedia::Factory::createPlayer ()
   from /opt/kde3/lib/libkdemm.so.0
#30 0x416208d3 in KDE::Multimedia::SimplePlayer::SimplePlayer ()
   from /opt/kde3/lib/libkdemm.so.0
#31 0x4160f52e in ?? () from /opt/kde3/lib/libkdeinit_knotify.so