Re: a11y: pulseaudio muted in squeeze by default
Hi.
On Thu, Sep 30, 2010 at 11:49:34AM +0200, Samuel Thibault wrote:
> This needs to be discussed with Milan: he explicitly dropped the alsa
> fallback to avoid blocking other applications.
>
> Also see Hynek's remarks:
>
> “If we are to stay with 0.7, this commit needs to be applied:
> 4b7c03605c754aa0b3f192c0385a30019ffecdef
> which will prevent the issues related to audio fallback.”
>
> The corresponding changelog is
>
> commit 4b7c03605c754aa0b3f192c0385a30019ffecdef
> Author: Hynek Hanke <hanke@brailcom.org>
> Date: Fri Aug 27 12:41:13 2010 +0200
>
> Disable audio fallback and use Pulse Audio by default
>
> Audio fallback is the right solution, but a prerequisite
> is proper freeing of resources when the given instance
> of server is not in an active session. Since this
> is currently not implemented, audio fallback leads
> to problems.
>
> Under the previous settings "pulse, alsa", if
> Speech Dispatcher is started in a session where
> Pulse is not available, it will open ALSA, thus
> preventing Pulse to start in all other sessions.
> This subsequently breaks all audio for all
> users although the session which blocks the
> device is actually not active.
>
> To prevent this, audio fallback is not used
> by default.
>
> Additionally, mention libao, which was missing.
>
> Reviewed-by: Christopher Brannon <cmbrannon79@gmail.com>
>
> I think you mentioned that the libao output doesn't have such blocking
> issue, Hynek, can you confirm this? This will probably a good enough
> reason for enabling libao support as fallback (which debian-release will
> have to agree on).
>
> Samuel
>
I'm not sure I understand this. I don't have any problems playing audio in other sessions using 0.7 with alsa for audio
output. Currently, speech-dispatcher is used in my user session for Orca output while espeakup is providing
speech output in my text consoles. I'm also playing audio using mplayer with no issues. This is on a system using
the on board sound card. The card uses the snd_intel8x0 driver. It isn't multi
channel, so everything is being mixed using dmix.
Kenny
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