Comments (5)
Thanks for the report.
I have M-Audio ProFire Lightbridge as one of my test device, and have realized that the
device has some quirks in its packet streaming. As a result, ALSA bebob driver often detects
packet discontinuity and cancels data transmission, as you can see in your kernel log:
[ 458.114359] snd_bebob fw1.0: Detect discontinuity of cycle: 62238 2253
[ 536.859305] snd_bebob fw1.0: Detect discontinuity of CIP: C0 C8
The first line means that the device stops packet transmission during 4015 isochronous
cycles. The second line means that the device doesn't multiplex PCM frames in an
isochronous packet.
You can see my comment in patch for Linux kernel as well:
- commit 5ec85c198eff ("ALSA: bebob: distinguish M-Audio ProFire Lightbridge quirk")
Inconvenient to you, I have not found remedy against it yet. This means that at present it's
a bit hard to use the device with PulseAudio or PipeWire since the sound servers manage
to start/stop data transmission several times to retrieve parameters of PCM substream
when detecting new device.
If saying that we have possibility to use the device, it might be with jackd in Jack Audio
Connection Kit since it doesn't have function to detect new device automatically. In the
case, uses need to try starting the service several times till the device finally transfers
stable sequence of packet.
I'm sorry to trouble you but it's the best what we can do at present...
from linux-firewire-dkms.
Thank you.
I have in the meantime got the M-Audio ProFire LightBridge interface working in Windows 7 SP1 (32bit)
- on another computer - a HP Pavillion p6000. Intel core i3. 8GB ram. Nvidia geforce 610. - with VIA FireWire onboard controller.
My best wishes
Jens Peter Nielsen
from linux-firewire-dkms.
I'd like to fix the issue, however at present I have no idea. I keep the issue opened to tracking future improvements of ALSA firewir stack for the device.
from linux-firewire-dkms.
HP Pavillion p6000. Intel core i3. 8GB ram. Nvidia geforce 610. - with VIA FireWire onboard controller.
Everything works in Windows 10 19043.928
from linux-firewire-dkms.
An update.
I received a new PCI-E firewire card, It works on the PC that didn't work with the VIA FW card before. Below are the errors it gives in Linux. The Presonus ADA converter fails to lock sync to the M-Audio Profire Lightbridge.
Linux manjaro 5.14.0-rc2-next-20210722custom #1 SMP PREEMPT Thu Jul 22 18:08:41 CEST 2021 x86_64 GNU/Linux
lspci | grep -i firewire
06:00.0 FireWire (IEEE 1394): Texas Instruments TSB82AA2 IEEE-1394b Link Layer Controller (rev 01)
[ 307.250565] firewire_core 0000:06:00.0: phy config: new root=ffc1, gap_count=5
[ 307.538461] firewire_core 0000:06:00.0: phy config: new root=ffc1, gap_count=5
[ 307.768216] firewire_core 0000:06:00.0: created device fw1: GUID 000d6c0800a6706e, S400
[ 340.057987] snd_bebob fw1.0: Detect discontinuity of CIP: B0 B8
[ 371.626481] snd_bebob fw1.0: Detect discontinuity of CIP: B8 C0
[ 420.058488] snd_bebob fw1.0: Detect discontinuity of CIP: B0 B8
[ 444.559352] snd_bebob fw1.0: Detect discontinuity of CIP: B8 C0
[ 467.642537] snd_bebob fw1.0: Detect discontinuity of CIP: C0 C8
[ 540.089429] snd_bebob fw1.0: Detect discontinuity of CIP: B0 B8
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 1: UMC1820 [UMC1820], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Audio [Rift Audio], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: Lightbridge [ProFire Lightbridge], device 0: BeBoB [ProFire Lightbridge PCM]
Subdevices: 1/1
Subdevice #0: subdevice #0
from linux-firewire-dkms.
Related Issues (20)
- M-Audio ProFire Lightbridge: Kernel panic HOT 6
- Mackie Onyx 1640i: Kernel module snd-oxfw plays audio in slow motion. HOT 45
- Card detected but not available HOT 3
- Mackie Onyx 1640i: JACK instance hangs randomly after long playback. HOT 28
- Firewire MOTU 8-PRE: sound output is VERY distorted HOT 2
- Behringer X32: Crackling playback at 48 kHz HOT 18
- FireFace800 buffer freezes HOT 9
- UBSAN: invalid-load in fcp.c load value of 16 is not valid for type '_Bool' HOT 4
- saffire pro 40 - tries to connect but fails HOT 8
- Fireface 802 : does not work with a buffer size of 128 / periods 2 HOT 1
- [snd-dice] latency 13 times higher compared to FFADO (Saffire 14 PRO) with jack2 HOT 1
- mic Input no longer avasilable after upgrading to ubuntu 22.10 HOT 5
- Fireface 800 stuck in initialization after sleep HOT 2
- fireface 802: too much latency with pipewire HOT 7
- snd-bebob does not recognize Behringer FCA1616 HOT 6
- Question... HOT 5
- saf pro40 - cannot get alsa / lib spa / pipewire to see / recognise 96khz mode (it still sees 48000 max) HOT 4
- Fireface 800 lockup with pipewire HOT 1
- Fireface 802 : higher roundtrip latency than expected HOT 2
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