have you send email to the reporter , author and committer of the patch ALSA: hda/realtek - Add quirk for Mac Pro 5,1 machines ?
it is possible to use hint "multi_io = false" to disable the multichannel support but get_line_out_pfx() function in hda_generic only assign "PCM playback volume" instead of "Front playback Volume" to Line Out jack when multi_io is disabled -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1026847 Title: [MacPro5,1, Realtek ALC889A, Green Headphone Out, Front] No sound at all To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1026847/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
