Seeing that :
[   14.860153] saa7134 ALSA driver for DMA sound loaded
[   14.860187] saa7134[0]/alsa: saa7134[0] at 0xd8000000 irq 20 registered as 
card -2
[   14.860675] saa7134[1]/alsa: saa7134[1] at 0xd8002000 irq 21 registered as 
card -1
[   14.911163] cannot find the slot for index 0 (range 0-1)
[   14.911169] hda-intel: Error creating card!
[   14.911174] HDA Intel: probe of 0000:00:1b.0 failed with error -12

It could be :
-An alsa driver problem (not correctly detected card)
-A conflict with the saa7134 driver (I don't really understand those -2 and -1 
card number)
-An ACPI problem (IRQ conflict)

I'd start by blacklisting saa7134 in /etc/modprobe.d/blacklist to see if
there is any change.

-- 
[feisty] HDA-Intel sound problems
https://launchpad.net/bugs/83015

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