[mythtv-users] No sound if receiver is turned off at boot (Was: What display manager (and window manager) to choose)

[Anthony Giggins]

On 24 February 2017 at 05:45, Jason Zarin <jason at zarin.org> wrote:

> On 21 February 2017 at 21:07, Peter Carlsson <maillist.peter at home.se <http://lists.mythtv.org/mailman/listinfo/mythtv-users>> wrote:
>
> >* On Wed, Jan 18, 2017 at 08:31:34AM +0100, Peter Carlsson wrote:
> *>* > Hello!
> *>* >
> *>* > I would like to know what display manager and window manager people
> *>* > are using.
> *>* >
> *>* > I used to have a line in /etc/inittab but I think that method
> *>* > was deprecated in one Debian update a year or more ago.
> *>* >
> *>* > I then started to use SLiM and recently changed to LightDM.
> *>* >
> *>* > For my Debian (Jessie/stable) MythTV system I use XFCE4, but I have
> *>* > a problem (with both SLiM and LightDM) that it sometimes fails to
> *>* > autologin. It feels like a race condition where it attempts to
> *>* > autologin before the window manager is fully started.
> *>* >
> *>* > So I would be happy if people could tell me what combination of
> *>* > display manager and window manager you are using.
> *>* >
> *>* > It must support autologin but doesn't have to be fancy or anything.
> *>>* I solved this problem by using nodm and I also had to modify
> *>* /etc/X11/xorg.conf to always use a predefined EDID-file even if the
> *>* receiver/TV is turned off at boot.
> *>>* Now it seems like I have a similar problem with the audio. If the
> *>* receiver/TV is turned off at boot I get no sound.
> *>>* My workaround for this is to turn on the receiver/TV and then do a
> *>* 'killall xfce4-session'. This restarts the XFCE4 and the sound works.
> *>>* Is there a similar way for ALSA to use a predefined settings file to
> *>* use if the receiver/TV is turned off att boot?
> *>>* Best regards,
> *>* Peter Carlsson
> *>
>
> >Hi Peter,
>
> >You should be able to define this in your /etc/asound.conf
>
> > ie
> >. pcm.!default {
> >type hw
> >card 1
> > device 7
> > }
>
> > although you can also specify this in your mythtv Audio config
> > ie. ALSA:plughw:CARD=NVidia,DEV=7
>
> > https://www.mythtv.org/wiki/Configuring_Frontend#Audio_System
>
> > Cheers,
>
> > Anthony
>
>
> Losing sound and/or video with HDMI whenever you turn the TV or receiver off (or booting with one of them off) is a Known Issue with XFCE as the window manager. See https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1308105 . It's possible this bug may have been fixed upstream in the XFCE sources, but hasn't yet migrated down to Debian. Especially Debian Stable.
>
> The easiest solution is to change window managers. I use LXDE and have no issues. On the other hand, when I used XFCE (the default in mythbuntu), any time I turned either the receiver or TV off, things broke. Basically, change to *any* window manager from XFCE and your problem should go away.
>
> Good luck!
>
>
> Interesting this does appear to be the same issue I'm encountering in
14.04, the TV randomly wont play any audio.

I've tried rebooting, shutting down mythtv & unplugging the HDMI cable (but
I loose display signal and a reboot is the only thing that brings it back
is a reboot) but the only thing that seems to fix this is powering off the
TV and powering it back on.

I'll try upgrading to 16.04 to get these patches in the near future.

Anthony
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