Can't unmute sound after playing video

Question

I'm running Ubuntu on a Toshiba C660 (4GB RAM, Intel Core i5). My soundboard is integrated and after trying to play a song on youtube my volume is muted. I can't unmute it (appears like it's unmuted , but it's mute)

Solution 1

Try this:

sudo killall pulseaudio
sudo alsa force-reload

Solution 2

I had a similar problem, I just recently upgrade from 11.10 to 12.04 . In my case i was able to hear sound on System -> Sound -> Test Sound. But I couldn't hear a sound on youtube or while playing mp3's on rhythmbox.

I followed instruction at https://help.ubuntu.com/community/SoundTroubleshootingProcedure solution for 12.04 And now everything is back to normal.

I hope it helps

Cheers,

Bram

Solution 3

Given your sparse information and my limited knowledge on the topic, I can only offer a possible solution from my own experience: pulseaudio and flash do seem to cause problems from time to time. Killing one or the other solves this problem often for me: e.g.

run pkill pulseaudio in a terminal and then reload the youtube video.

Comments

[Vijay]

it works now. i restarted my pc and it worked. but it seems its doing this constantly. ill follow the instructions you gave me :) thanx !

[Vijay]

thank you :) its not only on youtube. if i open a player it doesnt work either :)

[Big Rich]

My Dell XPS 17 (l702x) displays the same behaviour under 12.04 (no video sound, test sound in applet OK). I'll try the instruction at the link above, it's a shame that they look so lengthy and involved (oh well). Cheers, Rich.

[tony gil]

18 steps to fix audio? and, in the end, audio STILL doesnt work. ubuntu will be a great OS, once it is ready. if you're not a total geek, ubuntu is at best a backup system for when windows crashes or you are navigating high-risk seas.

[tony gil]

didnt work for me.