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I exclusively use headphones on my laptop. When I unplug the power adapter and headphones to put my laptop away at school, the music starts blaring out of the built-in speakers. Can I just disable the built in speakers, or do I always have to mute the speakers before I unplug the headphones? My laptop is set to not sleep (just screen off) when I close the lid because I want my code to continue to compile while walking to my next class.

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modprobe -r pcspkr


sudo nano /etc/modprobe.d/blacklist.conf

and add blacklist pcspkr.

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it's not a pcspkr. this line is already in blacklist.conf. adding it again will do nothing. – user114558 Feb 24 '13 at 23:15
what about snd_pcsp – Remus Rigo Feb 25 '13 at 0:47
amixer -c<num> set <SCONTROL> mute – Remus Rigo Feb 25 '13 at 0:49

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