Bad sound out of headphone jack

Asked by william

Hi, I apologize up front. I'm brand new to anything Linux and will probably need a frustratingly large amount of help to get you all the info needed in order to help me.
The problem I'm having is with my sound. The laptop (Lenovo Ideapad Y510P) speakers work just fine, but when I plug in the headphones there is background static that does not vary in volume when I alter the volume level (it does, however, go away when I mute the sound altogether).
I fully expect you to hit me with a barrage of questions about my system, but here's what I know at the moment:

Release 12.04 64-bit
Kernel Linux 3.11.0-19-generic
GNOME 3.4.2
Processor: Intel i7-4700MQ CPU @ 2.40 GHz x 8

After running alsamixer from the terminal I see that I have v.1.0.25, and for sound cards it says
0 HDA Intel HDMI and
1 HDA Intel PCH

Please let me know what other info you may need (as well as how to get it, preferably) and thanks in advance.

Bill

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Ubuntu alsa-driver Edit question
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actionparsnip (andrew-woodhead666) said :
#1

What is the output of:

wget -O alsa-info.sh http://www.alsa-project.org/alsa-info.sh && chmod +x ./alsa-info.sh && ./alsa-info.sh --upload

Thanks

Revision history for this message
william (william-capecchi) said :
#2
Revision history for this message
actionparsnip (andrew-woodhead666) said :
#3

execute this command and reboot:

sudo apt-get update;sudo apt-get dist-upgrade; sudo apt-get install pavucontrol linux-sound-base alsa-base alsa-utils lightdm ubuntu-desktop linux-image-`uname -r` libasound2; sudo apt-get -y --reinstall install linux-sound-base alsa-base alsa-utils lightdm ubuntu-desktop linux-image-`uname -r` libasound2; killall pulseaudio; rm -r ~/.pulse*; ubuntu-support-status; sudo usermod -aG `cat /etc/group | grep -e '^pulse:' -e '^audio:' -e '^pulse-access:' -e '^pulse-rt:' -e '^video:' | awk -F: '{print $1}' | tr '\n' ',' | sed 's:,$::g'` `whoami`

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william (william-capecchi) said :
#4

The problem (sort of) persists. When I rebooted and played something, the sound quality was very poor for about 10-15 seconds and then 'flipped' to normal good quality. To me it is reminiscent of simply having the volume too low- at low volume the noise ratio is higher, so amplifying it elsewhere (turning up some other volume knob) would make the static louder as well. The only problem is it appears all my volumes are at normal operating levels. And truth be told, it appears to be functioning much better than before. I'm not sure what I just updated, but unless there are other brilliant ideas out there I'm gonna live with what I have.

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