You can do:
export GST_DEBUG=GST_ELEMENT_FACTORY:3

To find out what exactly is playbin doing, so you can try different
pipelines trying to reproduce the issue.

You can also paste the output here if you need help.

Here is output for Different Commands ( gst-lanch-0.10 alone, gst-launch-0.10 with play bin and totem from source packages ).
All these command are run from the same command prompt & gstreamer openmax build is same for all.

1. Command: $ gst-launch-0.10 filesrc location=Sample.mp3 ! omx_mp3dec ! omx_audiosink

Output:
0:00:00.541246443 10863 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "filesrc"
0:00:00.542451992 10863 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "omx_mp3dec"
0:00:00.542542517 10863 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "omx_audiosink"
0:00:00.542737328 10863 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "pipeline"
Setting pipeline to PAUSED ...

Pipeline is PREROLLING ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
pad_event():eos ---from ---- gstomx_base_filter.c
handle_event():eos ---from ---- gstomx_base_Sink.c
Got EOS from element "pipeline0".
Execution ended after 10927551006 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
FREEING pipeline ...

Observation: Sound coming Properly from my audio card.

2. Command:$ gst-launch playbin uri=file:///Sample.mp3

Output:

0:00:00.679714213 10910 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "playbin"
Setting pipeline to PAUSED ...
0:00:00.683916693 10910 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "test"
0:00:00.684322156 10910 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "filesrc" named "source"
0:00:00.685265890 10910 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "decodebin"
0:00:00.686449357 10910 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "typefind" named "typefind"
0:00:00.686845780 10910 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "fakesink"
0:00:00.714458553 10910 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "mp3parse"
0:00:00.736375402 10910 0x81474d8 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "omx_mp3dec"

Pipeline is PREROLLING ...


0:00:00.897804041 10910 0x81474d8 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "queue" named "preroll_audio_src0"
0:00:00.900152615 10910 0x81474d8 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "autoaudiosink" named "audiosink"
0:00:00.900536597 10910 0x81474d8 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "tempsink"
0:00:00.900968301 10910 0x81474d8 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "bin" named "abin"
0:00:00.903642214 10910 0x81474d8 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "audioconvert" named "aconv"
0:00:01.054248196 10910 0x81474d8 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "audioresample" named "aresample"
0:00:01.056150184 10910 0x81474d8 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "volume" named "volume"
0:00:01.069029998 10910 0x81474d8 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "pulsesink" named "audiosink-actual-sink-pulse"

Pipeline is PREROLLED ...

Setting pipeline to PLAYING ...
New clock: GstAudioSinkClock

WARNING: from element /playbin0/abin/audiosink/audiosink-actual-sink-pulse: Compensating for audio synchronisation problems

Additional debug info:
gstbaseaudiosink.c(1190): gst_base_audio_sink_render (): /playbin0/abin/audiosink/audiosink-actual-sink-pulse:
Unexpected discontinuity in audio timestamps of more than half a second (0:00:00.508934240), resyncing

WARNING: from element /playbin0/abin/audiosink/audiosink-actual-sink-pulse: Compensating for audio synchronisation problems

Additional debug info:
gstbaseaudiosink.c(1190): gst_base_audio_sink_render (): /playbin0/abin/audiosink/audiosink-actual-sink-pulse:
Unexpected discontinuity in audio timestamps of more than half a second (0:00:00.522063492), resyncing

---------------

Got EOS from element "playbin0".
Execution ended after 6591240093 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
0:00:08.092667213 10910 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "fakesrc"
0:00:08.094828696 10910 0x804e050 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "tempsink"
Setting pipeline to NULL ...
FREEING pipeline ...

pad_event():eos ---from ---- gstomx_base_filter.c

Observation: No Sound coming from my audio card.

3. Command:
$ ./totem Sample.mp3

Output:

0:00:01.171496960 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "playbin" named "play"
0:00:01.173127573 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "gconfaudiosink" named "audio-sink"
0:00:01.176106983 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "testsink"
0:00:01.177234287 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "gconfvideosink" named "video-sink"
0:00:01.177338213 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "testsink"
0:00:01.183720137 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "autovideosink"
0:00:01.183908348 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "tempsink"
0:00:01.184135401 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "bin"
0:00:01.186576620 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "xvimagesink" named "autovideosink0-actual-sink-xvimage"
0:00:01.192173499 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "ximagesink" named "autovideosink0-actual-sink-ximage"
0:00:01.226096112 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "autoaudiosink"
0:00:01.226285483 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "tempsink"
0:00:01.226518936 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "bin"
0:00:01.230481522 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "pulsesink" named "autoaudiosink0-actual-sink-pulse"
0:00:01.233372086 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "tempsink"
0:00:01.233578058 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "testsink"
0:00:01.233786710 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "capsfilter" named "audiofilter"
0:00:01.234035004 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "bin" named "audiosinkbin"
0:00:01.355478285 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "goom" named "vis_element"
0:00:01.359424949 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "capsfilter" named "vis_capsfilter"
0:00:01.359684844 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "bin" named "vis_bin"
0:00:01.697677345 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "goom" named "vis_element"
0:00:01.701773778 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "capsfilter" named "vis_capsfilter"
0:00:01.702084396 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "bin" named "vis_bin"
0:00:01.702485019 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "test"
0:00:01.702718232 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "filesrc" named "source"
0:00:01.703851737 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "decodebin"
0:00:01.704570377 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "typefind" named "typefind"
0:00:01.704929958 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "fakesink"
0:00:01.713674776 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "mp3parse"
0:00:01.719891011 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "omx_mp3dec"

0:00:01.916061790 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "queue" named "preroll_audio_src0"
0:00:01.916597860 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "bin" named "abin"
0:00:01.918211312 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "audioconvert" named "aconv"
0:00:01.961370212 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "audioresample" named "aresample"
0:00:01.963192276 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "volume" named "volume"
0:00:01.967219105 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "autoaudiosink"
0:00:01.967338312 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "tempsink"
0:00:01.967535603 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "bin"
0:00:01.967854821 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "pulsesink" named "autoaudiosink1-actual-sink-pulse"
0:00:01.979841984 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "bin" named "vbin"
0:00:01.982544898 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "ffmpegcolorspace" named "vconv"
0:00:01.984982437 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "videoscale" named "vscale"
0:00:01.985123005 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "identity" named "id"
0:00:02.121969004 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "bin" named "visbin"
0:00:02.122113653 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "tee" named "tee"
0:00:02.122237140 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "queue" named "vqueue"
0:00:02.122361107 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "queue" named "aqueue"
0:00:02.122509955 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "audioconvert" named "aconv"
0:00:02.122621042 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "audioresample" named "aresamp"
0:00:02.122746569 10992 0x8480e60 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "audioconvert" named "aconv2"

pad_event():eos ---from ---- gstomx_base_filter.c

0:00:09.145623219 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "fakesrc"
0:00:09.152330081 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "tempsink"
0:00:09.160628394 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "testsink"
0:00:09.250665005 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "tempsink"
0:00:09.257134373 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create:
reating element "fakesink" named "testsink"
0:00:09.275441777 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "test"
0:00:09.276058372 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "filesrc" named "source"
0:00:09.276184139 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "decodebin"
0:00:09.276748491 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "typefind" named "typefind"
0:00:09.276911981 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "fakesink"
0:00:09.277971241 10992 0x809c4b0 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "mp3parse"
0:00:09.278914855 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "omx_mp3dec"

0:00:09.462252143 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "queue" named "preroll_audio_src0"
0:00:09.462826215 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "bin" named "visbin"
0:00:09.462912700 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "tee" named "tee"
0:00:09.462990625 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "queue" named "vqueue"
0:00:09.463077390 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "queue" named "aqueue"
0:00:09.463193836 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "audioconvert" named "aconv"
0:00:09.463272401 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "audioresample" named "aresamp"
0:00:09.463348125 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "audioconvert" named "aconv2"
0:00:09.505146227 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "autovideosink"
0:00:09.505265834 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "tempsink"
0:00:09.505449965 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "bin"
0:00:09.512109104 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "xvimagesink" named "autovideosink1-actual-sink-xvimage"
0:00:09.583806110 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "ximagesink" named "autovideosink1-actual-sink-ximage"
0:00:09.594288267 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "autoaudiosink"
0:00:09.594417235 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "fakesink" named "tempsink"
0:00:09.594600565 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:399:gst_element_factory_create: creating element "bin"
0:00:09.594900342 10992 0x8674570 INFO   GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create: creating element "pulsesink" named "autoaudiosink2-actual-sink-pulse"

pad_event():eos ---from ---- gstomx_base_filter.c

Observation: No Sound coming from my audio card. and also no seek moment in totem player window.

These are my observations with different tools. Check these outputs and reply me if have any idea.


--
Thanks & Regards
Sriramamurti Kommanapalli