Unfortunately it looks like this didn't make it into 15.10/wily:
The id for the elan device isn't in the ignore list:
http://kernel.ubuntu.com/git/ubuntu/ubuntu-wily.git/tree/drivers/hid
/hid-core.c
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Also experiencing the same problem with another Intel 82801 Hd Audio
Controller (ICH10). Tried above suggestions and checked other output
sockets to no avail.
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No Audio with Ubuntu 9.04
https://bugs.launchpad.net/bugs/367508
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