@Nicholas: that is 3.15 rc2 kernel. The fix was not incorporated until
rc8.
Thank you for confirming that the issue is not just ALC1150.
** Summary changed:
- 8086:8ca0 Sound output unusable with Intel Z97/H97 and ALC1150 Audio
+ 8086:8ca0 Sound output distorted/unusable with Intel Z97/H97
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I have an MSI H97M-G43 motherboard, H97 chipset but ALC892. Running
Kubuntu 14.04
Installing the 3.15.0-031500rc2-generic kernel did not work, even though
the patch was apparently incorporated.
The suggestion about: echo options snd-hda-intel vid=8086 pid=8ca0
snoop=0 sudo
I just wanted to let you know that linus has pulled the patch from
Takashi Iwai and it is in 3.15-rc8 so almost certainly in 3.15 [1,2].
As i understood from a discussion on the kernel team channel in irc last
week, a backport for 14.04 should be possible now.
1
Scratch that, I made some mistakes when creating the conf file. Seems to
be working now!
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https://bugs.launchpad.net/bugs/1321421
Title:
8086:8ca0 Sound output unusable with Intel
Even with the workaround I get crackling noise, just not as much as without the
workaround.
I am using an ASUS Z97-A motherboard.
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https://bugs.launchpad.net/bugs/1321421
Title:
Andreas Berger, thank you for your comment. If you have a bug in Ubuntu, the
Ubuntu Audio Developer team, Ubuntu Kernel team, Ubuntu Bug Control team, and
Ubuntu Bug Squad all would like you to please file a new report by executing
the following in a terminal:
ubuntu-bug sound
For more on