I believe we're experiencing basically the same problem with the upcoming System76 Haswell desktop products.
The problem (for us) is that HDMI audio devices simply don't show up at all in the sound menu. We're able to fix this by cherry-picking these 3 commits from mainline: 9419ab6b72325e20789a61004cf68dc9e909a009 ALSA: hda - Add power state filtering c88d4e84e639df9a9640ecff71de2501a84d1f48 ALSA: hda - Yet another fix for broken HSW HDMI pin connections 17df3f55652f7ea8fb1197b5c32e227b3da9f215 ALSA: hda - Apply pin-enablement workaround to all Haswell HDMI codecs These 3 commits are already present in the Saucy tree, although it seems there is perhaps a regression currently in Saucy in that the HDMI device will only show up if connected at boot, wont show up if you plug in a different monitor after initially booting with a monitor that lacks HDMI audio. Anyway, for reference here are the mainline commits, which you can cleanly cherry pick into the current Raring tree: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9419ab6b72325e20789a61004cf68dc9e909a009 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c88d4e84e639df9a9640ecff71de2501a84d1f48 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=17df3f55652f7ea8fb1197b5c32e227b3da9f215 ** Also affects: system76 Importance: Undecided Status: New ** Changed in: system76 Status: New => In Progress ** Changed in: system76 Assignee: (unassigned) => Jason Gerard DeRose (jderose) ** Changed in: system76 Importance: Undecided => Critical -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1183125 Title: Haswell: Ensuring HDA codec pins refer to physical outputs To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1183125/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
