you have to switch off "IEC958 Default PCM" if you are using AC3 passthrough
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/?id=9a08160bdbe3148a405f72798f76e2a5d30bd243 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1014897 Title: [ASRock A75M-ITX, Realtek ALC892, Grey SPDIF Out, Rear] Surround output not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1014897/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
