On 05/13/2013 11:19 PM, Christian Iversen wrote: > On 2013-05-13 05:41, Arun Raghavan wrote: >> On Sun, 2013-05-12 at 17:18 +0200, Christian Iversen wrote: >> [...] >>> Is there any way to have pulseaudio keep the device open at all times? >>> Or some other way to debug this? >> >> Disable the loading of module-suspend-on-idle in /etc/pulse/default.pa. >> I'm assuming you don't care about the resulting power consumption. :) > > Ah, there is was! :) > > Well, that's great. Thanks! > > I don't think the Scarlett 2i2 really supports any meaningful power save > mode anyway. It's quite a low-power soundcard to begin with (powered > entirely by the USB bus). Not so low-power IMO, it takes about 2-3W of my battery when connected (only tested with phantom power on). I think it does that regardless of stream running or not, but have not really checked. (The direct monitor requires headphone amp and mic amps on anyway.) > Anyway, even with the official driver for windows, this card has > terrible clicks and pops when starting up from suspend (or power off). Ok, good to know. > Does module-suspend-on-idle have a blacklist? It should! And this card > should be on it. There are other reasons for wanting to release the sound card when not actively using it - it makes compatibility with other apps easier, i e, everything that wants to use ALSA directly (except jack2 which has device reservation). > What does pa use for identifying backends? I mean, if I wanted to > blacklist certain modules for a specific PCI or USB id, is that > something that is reasonably easy to do? Not currently, but it sounds very useful if we had a smart way of accomplishing this. -- David Henningsson, Canonical Ltd. https://launchpad.net/~diwic
