Per the comment on
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1247630/comments/2
this did indeed turn out to be a hardware issue where the ALC275 chipset
physically failed (quite surprising). Replacement of the module
corrected the issue thus is not an issue with Ubuntu audio or the
kernel. I propose that this bug be marked as invalid and closed.
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1247630
Title:
Dell XPS 13 with ALC275 missing analog and digital playback devices on
13.10
Status in “linux” package in Ubuntu:
Invalid
Bug description:
I lost audio when upgrading from 12.10 to 13.04 and the issue remained
after upgrading to raring (13.10).
As you can see, I am missing the Analog and Digital playback devices
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
I am not sure how to begin troubleshooting further as this appears to
be a unique situation that the sound troubleshooting guides do not
address.
Audio Information from running alsa-info.sh
http://www.alsa-project.org/db/?f=be3f607e8b27a5c52c445de3748a99c7c3861156
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