[pulseaudio-discuss] Changes to deal with modem PCMs

[Pierre-Louis Bossart]

On 7/23/2012 3:57 AM, Arun Raghavan wrote:
> Hello,
> While discussion on how we should deal with hardware with different
> requirements from standard desktop cases continues, I'd like to solve the
> problem of having modem PCMs that we don't want to auto-suspend in the near
> future. For this, I've attached a couple of patches that allow a sink or source
> to be flagged as "always running" which would cause suspend to be avoided if
> possible.
>
> Any objections?
Yes. These devices are used to open connections to modems without 
receiving any data from userspace.
I don't think PulseAudio should flag specific sinks this way, somehow 
the information should be available at the ALSA level that such devices 
do not provide/expect any data and should not be suspended. This 
information is available at the kernel level (no_pcm flag or something), 
it should be made available to user-space.
-Pierre