On Tue, 2011-10-04 at 10:30 +0800, Raymond Yau wrote:
2011/10/1 Arun Raghavan arun.raghavan@collabora.co.uk:
On Sat, 2011-10-01 at 14:19 +0530, Arun Raghavan wrote:
Hi folks, We're seeing a problem when disconnecting USB headsets in PulseAudio. Steps to reproduce are basically: start PulseAudio, plug in USB device, wait for it to suspend (pcm is closed but mixer is not), disconnect. Fairly often, this results in PA getting killed because the polling thread is realtime and exceeds its rlimit. The problem is not limited to
Missed one detail -- I've only seen this happen on the alsa-source thread, not on alsa-sink, but I've only tested with one device which has playback as well as capture.
-- Arun
Cannot reproduced this issue on ubuntu 11.04 Live CD with Logictech WebCam mic
Thanks for trying this out.
PA server still keep running and Gnome Sound Preference automatically change the selected "input device" from USB microphone to on-board sound card when usb webcam is unplugged
Actully Gnome Sound Preference is lying about "no application is using the sound card" since it open the "monitor" at 25Hz (peak-detect" for displaying the vumeter of the microphone
Sorry, my bad for not noticing this -- the code that polls the mixer fds got added in PulseAudio 1.0,. Ubuntu 11.04 runs PA 0.9.23. Could you try with an updated PA (and just to make sure, without the GNOME Sound Preferences dialog open, since that'll keep the device open and the disconnect gets handled earlier while polling the pcm).
Cheers, Arun