[pulseaudio-tickets] [Bug 93946] Changing device profile to HDMI is reset to default after short delay

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93946

--- Comment #22 from Mike C <mike.cloaked at gmail.com> ---
(In reply to David Henningsson from comment #19)
> (In reply to Mike C from comment #18)
> > (In reply to David Henningsson from comment #16)
> > > (In reply to Mike C from comment #14)
> > > > Just adding a brief comment to the valuable previous comment #13 that Tanu

> Still, something is telling us that there is an internal speaker, so please
> submit alsa-info ( https://wiki.ubuntu.com/Audio/AlsaInfo ) so we know for
> sure what it is.
> 
> Second, if this is a motherboard that has a "internal speaker" header on it
> which you chose not to connect when you built your HTPC, you should
> configure the system accordingly, e g by disabling the internal speaker
> through hda-jack-retask.

> The "corner case" refers to your phantom internal speaker.

On the system one way to show the analog "availability" is doing:
$ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
default
    Default ALSA Output (currently PulseAudio Sound Server)
sysdefault:CARD=PCH
    HDA Intel PCH, ALC892 Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    Front speakers
surround21:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=PCH,DEV=0
    HDA Intel PCH, HDMI 0
    HDMI Audio Output
hdmi:CARD=PCH,DEV=1
    HDA Intel PCH, HDMI 1
    HDMI Audio Output

Whilst in principle I could work to "disable" the internal speaker port using
the tool you mentioned I don't think that this is something that the typical
non-power user would be expected to do. After all there are a lot of tower
computers that do not have any internal speakers in the box, even if there is a
sound output socket on the motherboard. If a user chooses to have a simple HDMI
connection from the box to a monitor or his house TV set to use as a monitor
with sound, and have to clutter his desk having a set of speakers and
associated additional physical leads, then getting it going for any up to date
linux system, whether it is arch, Ubuntu, Fedora or any other flavour should
not need the user to start looking at internal changes in order to have sound
for normal desktop operation,  simply work with minimal config setup. 

I think it is perfectly reasonable for a user to expect to be able to install
pulseaudio and its associated libraries and click on a GUI setup facility and
select HDMI if he/she so chooses, and then expect it work continue to work
whether his system sleeps or power saves his monitor, or not. After all the
patch that caused this problem was added in the current release of pulseaudio,
so it should either be reverted or the problem fixed.

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