[alsa-devel] No sound from Mac Pro headphone port

https://bugtrack.alsa-project.org/alsa-bug does not work so following instructions to post bug here.

Linux 4. Mac Pro 2009. ACL889A codec.

No sound from headphone port. Seems to detect plug / unplug OK.

Works OK when machine booted to OS X or Windows 7.

Have found several bug repors on similar issues with Mac laptops but no fixes.

Have written e-mail with David Henningsson on problem but unable to find a solution.

ALSA-info output:

http://www.alsa-project.org/db/?f=1dc7146eb34af5ad307d029868f775fac5e2764e