On 2016-10-24 00:43, Jonathan Woithe wrote:
On Sun, Oct 23, 2016 at 08:22:32PM +0200, Peti Pap wrote:
I installed now an Ubuntu 16.10 (because this distro can handle ffado 2.3 well), and now almost work the playback (but sometimes a bit noisy, and I dont know the reason). When I start the FFADO Mixer from terminal, I get the following messages:
Cannot create RT messagebuffer thread: Operation not permitted (1) Retrying messagebuffer thread without RT scheduling Messagebuffer not realtime; consider enabling RT scheduling for user
This indicates that your user does not have access to the realtime scheduling features on the system. While this should not affect the operation of ffado-mixer (and its related ffado-dbus-server), it will cause problems if you choose to use the FFADO audio streaming system via jackd's "firewire" backend. From the above message I'm not sure if you're doing this though: the "noisy" playback might still be relating to your use of the ALSA streaming driver.
On most distributions it is sufficient to add your user to the "audio".
Not having access to the realtime scheduling shouldn't cause ffado-mixer any problem. However, just to be sure it's probably worth adding your user to the audio group to see if that improves the ffado-mixer behaviour.
FFADO Control DBUS service Part of the FFADO project -- www.ffado.org Version: 2.3.0- (C) 2008, Pieter Palmers This program comes with ABSOLUTELY NO WARRANTY.
1477244892717343: (ffado-dbus-server.cpp)[ 270] main: Discovering devices... 03966254548: (ffado-dbus-server.cpp)[ 329] main: DBUS service running 03966254588: (ffado-dbus-server.cpp)[ 330] main: press ctrl-c to stop it & exit 03966254597: Debug (ffado-dbus-server.cpp)[ 333] main: dispatching... 03970152237: Error (avc_avdevice.cpp)[ 300] supportsSamplingFrequency: sample rate not supported by input plug
I'm not sure what would cause this. Was the device actively streaming audio at the time you started ffado-dbus-server? That still shouldn't cause any issues, but obviously something is amiss.
(And if I close the mixer GUI, I cant re-open again without killing the ffado-dbus-server)
That's strange. Something seems to be getting hung up somewhere.
Peti: to keep the original thread in alsa-devel on topic, you may like to subscribe to ffado-devel and start a fresh thread there about the above ffado-mixer / ffado-dbus-server issues you are seeing.
Regards jonathan