Hi David, Thanks for this patch. I uploaded new packages to PPA with the patch, and got logs with my device (Echo Audio AudioFire4). Please check this log. http://sakamocchi.jp/media/pulseaudio/pulse-echoaudio2.log In my opinion, 'force-speaker.conf' seems to be applied, so I got udevadm log. $ udevadm info --path /sys/class/sound/card1 P: /devices/pci0000:00/0000:00:1e.0/0000:02:01.0/fw1/fw1.0/sound/card1 E: DEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:01.0/fw1/fw1.0/sound/card1 E: ID_BUS=firewire E: ID_FOR_SEAT=sound-pci-0000_02_01_0 E: ID_ID=firewire-0x0014860f5a616e83 E: ID_MODEL=AudioFire4 E: ID_MODEL_FROM_DATABASE=R5C832 IEEE 1394 Controller E: ID_PATH=pci-0000:02:01.0 E: ID_PATH_TAG=pci-0000_02_01_0 E: ID_PCI_CLASS_FROM_DATABASE=Serial bus controller E: ID_PCI_INTERFACE_FROM_DATABASE=OHCI E: ID_PCI_SUBCLASS_FROM_DATABASE=FireWire (IEEE 1394) E: ID_VENDOR=Echo Digital Audio E: ID_VENDOR_FROM_DATABASE=Ricoh Co Ltd E: PULSE_PROFILE_SET=force-speaker.conf E: SOUND_INITIALIZED=1 E: SUBSYSTEM=sound E: TAGS=:seat: E: USEC_INITIALIZED=9260482 I hope this will help for this issue. Regards Takashi Sakamoto o-takashi at sakamocchi.jp On 2014?08?07? 13:19, David Henningsson wrote: > Hi, > > Your ppa packages looked correct, so I have written a small debug patch > that hopefully helps us pinpoint where the Multichannel profile disappears. > When you have some time, you can try it. One pulseaudio debug log should > be enough. Thanks!