Ubuntu
alsa-driver package

Sound randomly cuts out and does not come back (except infrequently when it does)

Asked by AndrewK

As per: https://help.ubuntu.com/community/SoundTroubleshootingProcedure

Steps 1 & 2 followed, including waiting and reboots.

* sound is not muted
* speakers are connected, and known working.

* Sound worked after install, occasionally fades or cuts out. (eg when bringing a different application into focus (chrome in several cases))
* Sound sometimes comes back, but not always, and rebooting has no impact on when/if.
* in system settings>sound>output, sometimes correct output is shown, sometimes only dummy, sometimes blank (as it is right now). Sound problems exist when correct output is shown.

* desired soundcard (and only one with speakers) is the on-motherboard intel.
* System is a fresh install, with /home copied from a previous 14.10 install (I had played with alternate WMs on that install, but not on this, only using nemo as file manager (as http://www.webupd8.org/2013/10/install-nemo-with-unity-patches-and.html)). This install also had the same sound issue, but less frequently.

http://www.alsa-project.org/db/?f=2b5e2b0bbc2bcd81b0619aff5c8af3cdc562da9c

I have not proceeded to install the daily alsa portion.
Thanks for any help or advice.

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AndrewK (quatch+ubuntu) said : 		#1

* Desired soundcard is the HDA Intel PCH at 0xf7f10000 irq 47, to the best of my knowledge (I'm connecting to the speaker headphone jack on the back of the motherboard).

* Input works (in as much as it shows the lifecam as an input, and the bargraph moves appropriately with noise)

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actionparsnip (andrew-woodhead666) said : 		#2

Ubuntu 14.10 is EOL in July this year. You may want to upgrade to Vivid which may help.

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AndrewK (quatch+ubuntu) said : 		#3

Thanks, I hadn't considered that as I am not prompted to update and http://www.ubuntu.com/download/desktop does not even show it for download yet. I can only find mention of it being in beta.

I'll give a go on the daily alsa build then. Should that not work, is there a better place I can go for help on this?

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AndrewK (quatch+ubuntu) said : 		#4

Ran step 3, no luck. (as a side note, running sudo apt-get install oem-audio-hda-daily-dkms causes notification that you're doing it wrong and to see dkms for the correct instructions.)

Ran step 4, sound working again. Output: http://pastebin.com/s38e0Ws7

Will update again when it fails again. I'm going to continue to update here on the off chance it's useful to someone else.

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