On Sun, 2018-07-15 at 19:57 +0900, Takashi Sakamoto wrote: > A bug was filed to bugzilla.kernel.org for a quirk of some models which > ALSA BeBoB driver supports. > > Bug 199365 - repeating bus resets on Firewire bus with Focusrite Saffaire 26/io > https://bugzilla.kernel.org/show_bug.cgi?id=199365 > > Some models (two models as long as I know) have a quirk to disappear from > IEEE 1394 bus at disconnections of packet streaming. Corresponding > character devices are removed according to 'remove' callbacks of relevant > drivers from Linux dd core. Then the models re-appear on the bus by > generating bus resets and corresponding character devices are added > according to 'probe' callbacks from Linux dd core. > > In a view of ALSA applications, this looks that plug-out/plug-in occur in > a sequential order for the models when they stop playback/capture substream. > For most applications, this doesn't cause large issue. However, this quirk > is not good for combination of below modules in PulseAudio. PulseAudio > enters endless loop to detect the models and start/stop PCM substream. > - module-udev-detect > - module-alsa-card > - module-suspend-on-idle > > In detail, please read my comment no.6: > https://bugzilla.kernel.org/show_bug.cgi?id=199365#c6 > > This commit suppressed udev detection of sound card for the issued models. > For the models, 'PULSE_IGNORE' flag is added to udev rules, then > module-udev-detect don't handle the models and PulseAudio never uses the > models automatically. In a scenario for users to load > module-alsa-card/module-alsa-sink/module-alsa-source by hand, although > these modules can still stop PCM substreams with module-suspend-on-idle, > PulseAudio never enters the endless loop because udev detection doesn't > work for the models. In this case, as long as special files for ALSA > character devices for these models are the same, corresponding sinks and > sources are available even if the voluntary plug-out/plug-in occur. > > (Focusrite Saffire Pro 10 i/o with systemd 237) > $ udevadm info -q all -p /devices/pci0000:00/0000:00:07.0/fw1/fw1.0/sound/card1 > P: /devices/pci0000:00/0000:00:07.0/fw1/fw1.0/sound/card1 > E: DEVPATH=/devices/pci0000:00/0000:00:07.0/fw1/fw1.0/sound/card1 > E: ID_BUS=firewire > E: ID_FOR_SEAT=sound-pci-0000_00_07_0 > E: ID_ID=firewire-0x00130e01000606e0 > E: ID_MODEL=Pro10IO > E: ID_MODEL_FROM_DATABASE=XIO2213A/B/XIO2221 IEEE-1394b OHCI Controller [Cheetah Express] > E: ID_MODEL_ID=0x000006 > E: ID_PATH=pci-0000:00:07.0 > E: ID_PATH_TAG=pci-0000_00_07_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_SERIAL=0x00130e01000606e0 > E: ID_SERIAL_SHORT=0x00130e01000606e0 > E: ID_VENDOR=Focusrite > E: ID_VENDOR_FROM_DATABASE=Texas Instruments > E: ID_VENDOR_ID=0x00130e > E: SOUND_INITIALIZED=1 > E: SUBSYSTEM=sound > E: SYSTEMD_WANTS=sound.target > E: TAGS=:systemd:seat: > E: USEC_INITIALIZED=957089064 > > (Focusrite Saffire Pro 26 i/o with systemd 237) > $ udevadm info -q all -p /devices/pci0000:00/0000:00:07.0/fw1/fw1.0/sound/card1 > P: /devices/pci0000:00/0000:00:07.0/fw1/fw1.0/sound/card1 > E: DEVPATH=/devices/pci0000:00/0000:00:07.0/fw1/fw1.0/sound/card1 > E: ID_BUS=firewire > E: ID_FOR_SEAT=sound-pci-0000_00_07_0 > E: ID_ID=firewire-0x00130e0100030cdd > E: ID_MODEL=Pro26IO > E: ID_MODEL_FROM_DATABASE=XIO2213A/B/XIO2221 IEEE-1394b OHCI Controller [Cheetah Express] > E: ID_MODEL_ID=0x000003 > E: ID_PATH=pci-0000:00:07.0 > E: ID_PATH_TAG=pci-0000_00_07_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_SERIAL=0x00130e0100030cdd > E: ID_SERIAL_SHORT=0x00130e0100030cdd > E: ID_VENDOR=Focusrite > E: ID_VENDOR_FROM_DATABASE=Texas Instruments > E: ID_VENDOR_ID=0x00130e > E: SOUND_INITIALIZED=1 > E: SUBSYSTEM=sound > E: SYSTEMD_WANTS=sound.target > E: TAGS=:systemd:seat: > E: USEC_INITIALIZED=1071026684 > > Signed-off-by: Takashi Sakamoto <o-takashi at sakamocchi.jp> > --- > .../alsa/mixer/profile-sets/90-pulseaudio.rules | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/src/modules/alsa/mixer/profile-sets/90-pulseaudio.rules b/src/modules/alsa/mixer/profile-sets/90-pulseaudio.rules > index ceb61d9e5..19b826b52 100644 > --- a/src/modules/alsa/mixer/profile-sets/90-pulseaudio.rules > +++ b/src/modules/alsa/mixer/profile-sets/90-pulseaudio.rules > @@ -19,6 +19,7 @@ SUBSYSTEM!="sound", GOTO="pulseaudio_end" > ACTION!="change", GOTO="pulseaudio_end" > KERNEL!="card*", GOTO="pulseaudio_end" > SUBSYSTEMS=="usb", GOTO="pulseaudio_check_usb" > +SUBSYSTEMS=="firewire", GOTO="pulseaudio_firewire_quirk" > > SUBSYSTEMS=="platform", DRIVERS=="thinkpad_acpi", ENV{PULSE_IGNORE}="1" > > @@ -109,4 +110,13 @@ ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1250", ENV{PULSE_PROFILE_SET}="steel > ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1260", ENV{PULSE_PROFILE_SET}="steelseries-arctis-7-usb-audio.conf" > ATTRS{idVendor}=="147a", ATTRS{idProduct}=="e055", ENV{PULSE_PROFILE_SET}="cmedia-high-speed-true-hdaudio.conf" > > +GOTO="pulseaudio_end" > + > +LABEL="pulseaudio_firewire_quirk" > + > +# Focusrite Saffire Pro 10/26 i/o has a quirk to disappear from IEEE 1394 bus when losing connections. > +# https://bugzilla.kernel.org/show_bug.cgi?id=199365 > +ENV{ID_VENDOR_ID}=="0x00130e", ENV{ID_MODEL_ID}=="0x000003", ENV{PULSE_IGNORE}="1" > +ENV{ID_VENDOR_ID}=="0x00130e", ENV{ID_MODEL_ID}=="0x000006", ENV{PULSE_IGNORE}="1" > + > LABEL="pulseaudio_end" Thanks! Applied. -- Tanu https://www.patreon.com/tanuk https://liberapay.com/tanuk
