If the new two pins can be never used, i.e. physically unreachable,
we may disable these pins by giving the proper default pin-config
values. Usually it's a job of BIOS. But if BIOS doesn't do it, user
need to do it manually.
Build your kernel with CONFIG_SND_HDA_HWDEP=y,
CONFIG_SND_HDA_RECONFIG=y, CONFIG_SND_HDA_PATCH_LOADER=y.
I guess most of distro kernels are built with them.
Then create a file containing below in /lib/firmware, such as,
/lib/firmware/ibx-hdmi:
================================================================
[codec]
0x80862804 0x80860101 3
[pincfg]
0x04 0x411111f0
0x06 0x411111f0
================================================================
Now pass this file to "patch" module option for snd-hda-intel.
For example, create a file in /etc/modprobe.d/,
e.g. /etc/modprobe.d/50-hdmi.conf, containing the line
options snd-hda-intel patch="ibx-hdmi"
Then reload the driver or reboot. This will disable pins 0x04 and
0x06 so that only the pin 0x05 will be used.
I've tested this workaround and it works well. I don't suppose this
could be added as a quirk to the kernel for this particular device?
(when and only if there's only one physically accessible HDMI
connector).
There are ways to configure pulseaudio to allow the user to select which
PCM device to use on a given sound card. David Henningsson made this work
for NVIDIA GPUs at least in Ubuntu, and I imagine the same technique
could be applied to Intel devices too.
Mmm.. just in Ubuntu? was this work submitted upstream? It appears
there are some related fixes shown in the Ubuntu pulseaudio changelog:
http://changelogs.ubuntu.com/changelogs/pool/main/p/pulseaudio/pulseaudio_1.1-0ubuntu9/changelog
I found a thread related to this issue here:
http://www.mail-archive.com/pulseaudio-discuss@mail.0pointer.de/msg07433.html
Started by yourself Stephen Warren! but it doesn't seem like it got anywhere...
As Takashi mentions, from a kernel perspective, this isn't really a
regression at all, but simply exposing all the features of the HW that
were previously hidden. Without that change, others can't use some HW
usefully at all. Unfortunately, pulseaudio makes some rather simplistic
assumptions about how HW works by default, and can be confused by the
additional features that are exposed.
Agreed. But in the case of laptops, I don't think I've ever seen one
that actually has more than one physical connector. I'm a little
puzzled as to how all these outputs (in my case 3) make sense for my
hardware...