I have a toshiba protege m400-s933. When I connect it to a toshiba dynadock dvi and external speakers are connected to the dynadock audio jack, there is no sound.
About a week ago there was sound. No software has been added to my knowledge. Also, if the laptop is not connected to the dynadock there is sound. Speakers also work if speakers are plugged directly into laptop audio jack and laptop is not connected to dynadock.
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You are right, it should not...Check your device manager and see if there is any problem listed there (the little yellow exclamation mark) against the Dynadock. Also check on Windows site if your device is listed as compatible with Win 8 ... Just some ideas, hard to tell just by description.
if using XP, go to start control panel , sound and audio devices.Under the audio tab make sure the C Media CM106 sound device is selected under sound playback. Then under the volume tab set the volume somewhere in the middle or at the top if you don;t have active speakers . Then Under Speaker settings advanced, make sure the speaker setup is set to Laptop Stereo speakers. Also make sure the speaker volumes are up on the speaker volume button. click ok. If no result check that the cm106 sound decvice was cemented in as I saw it dissaper when I thought i had slected it. I think the key thing here is the device and the laptop speakers setting.
I had the same problem. I went to the Toshiba sight and downliaded all the drivers for Windows 7. I loaded the new dirvers. The first time that I restarted the laptop I had the same result. I turned off the computer overnight. When I came into the office this morning and turned on the computer it resumed audio without the static that you would normally hear whether with system sounds or the media player. It absolutely has to do with the drivers since the headphone jack works (dynadock not in the loop). I would reccommmend not just restarting but turnung the Laptop off and restarting.
One question, are you using Adobe Type Manager? Adobe Type Manager is not compatible with multiple display support. When Adobe Type Manager is installed, multiple display support is disabled. Go to start>control panel>add/remove programs>currently installed programs, choose atm and click remove. You may be asked to restart click yes. See if this resolves your issue. I hope this helps a little.