I have no idea why this happens. But I found a solution after about 5 minutes.
Go to System Preferences Sound
Go to the Applications tab
Keep that open and open a nautilus window with a sound file
Hover your mouse over the sound file, but keep the sound preferences window
active.
After a
affecting me as well
how to receive the fix ?
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nautilus sound files previews not working in 10.04 (mute)
https://bugs.launchpad.net/bugs/585587
You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to nautilus in ubuntu.
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desktop-bugs
I had to wait for an update to solve it. I have all the repositories
enabled (proposed, unsupported too). But if no luck, u could try to
reinstall Nautilus and gstreamer.
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nautilus sound files previews not working in 10.04 (mute)
https://bugs.launchpad.net/bugs/585587
You received this bug
** Changed in: nautilus (Ubuntu)
Status: New = Fix Released
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nautilus sound files previews not working in 10.04 (mute)
https://bugs.launchpad.net/bugs/585587
You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to nautilus in ubuntu.
If you open up the sound preferences/applications tab, you will see
audio preview appear when you hover over the nautilus media file icon,
but the seek/status button doesn't move and of course no sound is heard.
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nautilus sound files previews not working in 10.04 (mute)
The image/video previews are OK in Nautilus, just the sound previews
don't work. Unfortulatelly, I have no idea on which day did the messy
update take place. Does anybody know, which concrete package this is
related to?
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nautilus sound files previews not working in 10.04 (mute)
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/49101192/Dependencies.txt
** Attachment added: ProcMaps.txt
http://launchpadlibrarian.net/49101193/ProcMaps.txt
** Attachment added: ProcStatus.txt
http://launchpadlibrarian.net/49101194/ProcStatus.txt
** Attachment