>
> IMPLICIT_FB_GENERIC_DEV(0x1397, 0x0507),
This should have been enough for ALSA to pick-up the implicit feedback
mode. Weird...
I tried it once again to confirm. It doesn't work (choppy audio and
"Implicit Feedback Mode: No" as per /proc/asound/card1/stream0).
FYI, this is what I did:
# modprobe -r snd_usb_audio
$ make prepare modules_prepare && make M=sound/usb modules &&\
sudo make M=sound modules_install
# modprobe snd_usb_audio
BOTH is a quirk for some BOSS devices and at least one Pioneer device,
don't worry I'm pretty sure your device doesn't need it.
FIXED just means we specify the implicit fb sync ep hardcoded, which
is obviously a bit bad but it's there because generic matching
doesn't always work.
Thank you. This confirms my guess. Still no idea why the Scarlett workaround
I saw somewhere uses the capture endpoint in playback_implicit_fb_quirks
(I don't remember the details, but has copied the link; we can look at
it later
if you are interested).
Could you please provide the dyndbg of both working and non-working
cases (without implicit_fb=1)? The documentation for doing so is here
https://www.kernel.org/doc/html/latest/admin-guide/dynamic-debug-howto.html
Please set snd-usb-audio.dyndbg=+p either at boot time or via debugfs
before connecting your USB device, then plug it in.
PFA. I'm yet to figure out my way around debugfs, so I copied dmesg. Just
noticed that `Creating new sync endpoint #84` is there when the module
is loaded
without `implicit_fb=1`. Also, both capture and playback endpoints report
`implicit_fb=0` in the log when the module is loaded without
`implicit_fb=1`,
while there is a difference when the module is loaded with `implicit_fb=1`.
Thank you,
--
Nandakumar Edamana
https://nandakumar.org
GPG Key: https://nandakumar.org/contact/gpgkey.asc
GPG Key Fingerprint: BA6B 8FDE 644F F861 B638 3E2F 45D6 05FC 646A F75D
- dmesg output, 2022-01-14
- clock source workaround is present
- `IMPLICIT_FB_GENERIC_DEV(0x1397, 0x0507),` line under playback_implicit_fb_quirks in /sound/usb/implicit.c (doesn't really change the feedback mode as per previous attempt)
- `modprobe snd_usb_audio dyndbg==p`
- still non-implicit feedback and stuttering
[48731.161380] usb 3-3: USB disconnect, device number 19
[48759.574239] usbcore: deregistering interface driver snd-usb-audio
[48763.455999] usbcore: registered new interface driver snd-usb-audio
[48774.731400] usb 3-3: new high-speed USB device number 20 using xhci_hcd
[48774.858557] usb 3-3: config 1 has an invalid interface number: 5 but max is 3
[48774.858574] usb 3-3: config 1 has no interface number 3
[48774.859485] usb 3-3: New USB device found, idVendor=1397, idProduct=0507, bcdDevice= 1.00
[48774.859515] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[48774.859531] usb 3-3: Product: UMC202HD 192k
[48774.859543] usb 3-3: Manufacturer: BEHRINGER
[48774.859551] usb 3-3: SerialNumber: 12345678
[48875.327447] usb 3-3: USB disconnect, device number 20
[48890.025235] usbcore: deregistering interface driver snd-usb-audio
[48931.816944] usbcore: registered new interface driver snd-usb-audio
[48937.230569] usb 3-3: new high-speed USB device number 21 using xhci_hcd
[48937.357639] usb 3-3: config 1 has an invalid interface number: 5 but max is 3
[48937.357656] usb 3-3: config 1 has no interface number 3
[48937.358633] usb 3-3: New USB device found, idVendor=1397, idProduct=0507, bcdDevice= 1.00
[48937.358651] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[48937.358658] usb 3-3: Product: UMC202HD 192k
[48937.358664] usb 3-3: Manufacturer: BEHRINGER
[48937.358670] usb 3-3: SerialNumber: 12345678
[49625.890252] usb 3-3: USB disconnect, device number 21
[49627.573706] usbcore: deregistering interface driver snd-usb-audio
[49665.802565] usbcore: registered new interface driver snd-usb-audio
[49672.560875] usb 3-3: new high-speed USB device number 22 using xhci_hcd
[49672.687974] usb 3-3: config 1 has an invalid interface number: 5 but max is 3
[49672.687991] usb 3-3: config 1 has no interface number 3
[49672.689028] usb 3-3: New USB device found, idVendor=1397, idProduct=0507, bcdDevice= 1.00
[49672.689050] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[49672.689062] usb 3-3: Product: UMC202HD 192k
[49672.689070] usb 3-3: Manufacturer: BEHRINGER
[49672.689077] usb 3-3: SerialNumber: 12345678
[49672.692367] usb 3-3: 1:1: found sync_ep=0x84, iface=1, alt=1, implicit_fb=0
[49672.692379] usb 3-3: 1:1: add audio endpoint 0x8
[49672.692409] usb 3-3: Creating new data endpoint #8
[49672.692417] usb 3-3: Creating new sync endpoint #84
[49672.692611] usb 3-3: 1:1 Set sample rate 192000, clock 40
[49672.696512] usb 3-3: 2:1: add audio endpoint 0x88
[49672.696539] usb 3-3: Creating new data endpoint #88
[49672.696803] usb 3-3: 2:1 Set sample rate 192000, clock 40
[49672.700437] usb 3-3: [10] FU [PCM Playback Switch] ch = 2, val = 0/1/1
[49672.700454] usb 3-3: [10] FU [PCM Playback Switch] ch = 1, val = 0/1/1
[49672.703760] usb 3-3: [10] FU [PCM Playback Volume] ch = 2, val = -32512/0/256
[49672.707047] usb 3-3: [10] FU [PCM Playback Volume] ch = 1, val = -32512/0/256
[49672.707540] usb 3-3: [11] FU [Mic Capture Switch] ch = 2, val = 0/1/1
[49672.707562] usb 3-3: [11] FU [Mic Capture Switch] ch = 1, val = 0/1/1
[49672.710665] usb 3-3: [11] FU [Mic Capture Volume] ch = 2, val = -32512/0/256
[49672.714037] usb 3-3: [11] FU [Mic Capture Volume] ch = 1, val = -32512/0/256
[49672.862329] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[49672.862341] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[49672.862349] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49672.862668] usb 3-3: 2:1 Set sample rate 48000, clock 40
[49672.865988] usb 3-3: Setting params for data EP 0x88, pipe 0x41680
[49672.866010] usb 3-3: Set up 12 URBS, ret=0
[49672.866016] usb 3-3: Setting usb interface 2:1 for EP 0x88
[49672.871524] usb 3-3: Closing EP 0x88 (count 1)
[49672.871531] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49672.872783] usb 3-3: EP 0x88 closed
[49672.873649] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[49672.873657] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[49672.873664] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49672.873937] usb 3-3: 2:1 Set sample rate 48000, clock 40
[49672.875980] usb 3-3: Setting params for data EP 0x88, pipe 0x41680
[49672.875992] usb 3-3: Set up 12 URBS, ret=0
[49672.875996] usb 3-3: Setting usb interface 2:1 for EP 0x88
[49672.877285] usb 3-3: Closing EP 0x88 (count 1)
[49672.877290] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49672.877669] usb 3-3: EP 0x88 closed
[49672.878685] usb 3-3: Open EP 0x8, iface=1:1, idx=0
[49672.878695] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[49672.878703] usb 3-3: Open EP 0x84, iface=1:1, idx=1
[49672.878828] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[49672.878838] usb 3-3: Setting usb interface 1:0 for EP 0x8
[49672.878968] usb 3-3: 1:1 Set sample rate 48000, clock 40
[49672.880042] usb 3-3: Setting params for data EP 0x8, pipe 0x41600
[49672.880062] usb 3-3: Set up 12 URBS, ret=0
[49672.880068] usb 3-3: Setting usb interface 1:1 for EP 0x8
[49672.880509] usb 3-3: Setting params for sync EP 0x84, pipe 0x21680
[49672.880517] usb 3-3: Set up 4 URBS, ret=0
[49672.883405] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[49672.883414] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[49672.883421] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49672.883605] usb 3-3: 2:1 Set sample rate 48000, clock 40
[49673.098932] usb 3-3: Setting params for data EP 0x88, pipe 0x41680
[49673.098958] usb 3-3: Set up 12 URBS, ret=0
[49673.098966] usb 3-3: Setting usb interface 2:1 for EP 0x88
[49673.099360] usb 3-3: Closing EP 0x88 (count 1)
[49673.099368] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49673.099743] usb 3-3: EP 0x88 closed
[49673.101201] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[49673.101215] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[49673.101227] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49673.101383] usb 3-3: 2:1 Set sample rate 48000, clock 40
[49673.102494] usb 3-3: Setting params for data EP 0x88, pipe 0x41680
[49673.102505] usb 3-3: Set up 12 URBS, ret=0
[49673.102508] usb 3-3: Setting usb interface 2:1 for EP 0x88
[49673.102892] usb 3-3: Closing EP 0x8 (count 1)
[49673.102899] usb 3-3: EP 0x8 closed
[49673.102903] usb 3-3: Closing EP 0x84 (count 1)
[49673.102907] usb 3-3: Setting usb interface 1:0 for EP 0x84
[49673.103270] usb 3-3: EP 0x84 closed
[49673.103325] usb 3-3: Closing EP 0x88 (count 1)
[49673.103330] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49673.103581] usb 3-3: EP 0x88 closed
[49673.117689] usb 3-3: Open EP 0x8, iface=1:1, idx=0
[49673.117709] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[49673.117716] usb 3-3: Open EP 0x84, iface=1:1, idx=1
[49673.117722] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[49673.117728] usb 3-3: Setting usb interface 1:0 for EP 0x8
[49673.117873] usb 3-3: 1:1 Set sample rate 48000, clock 40
[49673.121046] usb 3-3: Setting params for data EP 0x8, pipe 0x41600
[49673.121067] usb 3-3: Set up 12 URBS, ret=0
[49673.121074] usb 3-3: Setting usb interface 1:1 for EP 0x8
[49673.121433] usb 3-3: Setting params for sync EP 0x84, pipe 0x21680
[49673.121443] usb 3-3: Set up 4 URBS, ret=0
[49673.122892] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[49673.122903] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[49673.122913] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49673.123054] usb 3-3: 2:1 Set sample rate 48000, clock 40
[49673.124177] usb 3-3: Setting params for data EP 0x88, pipe 0x41680
[49673.124189] usb 3-3: Set up 12 URBS, ret=0
[49673.124192] usb 3-3: Setting usb interface 2:1 for EP 0x88
[49673.124503] usb 3-3: Closing EP 0x88 (count 1)
[49673.124508] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49673.124873] usb 3-3: EP 0x88 closed
[49673.125726] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[49673.125733] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[49673.125739] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49673.125872] usb 3-3: 2:1 Set sample rate 48000, clock 40
[49673.126932] usb 3-3: Setting params for data EP 0x88, pipe 0x41680
[49673.126947] usb 3-3: Set up 12 URBS, ret=0
[49673.126952] usb 3-3: Setting usb interface 2:1 for EP 0x88
[49673.127204] usb 3-3: Closing EP 0x8 (count 1)
[49673.127208] usb 3-3: EP 0x8 closed
[49673.127210] usb 3-3: Closing EP 0x84 (count 1)
[49673.127212] usb 3-3: Setting usb interface 1:0 for EP 0x84
[49673.127647] usb 3-3: EP 0x84 closed
[49673.127724] usb 3-3: Closing EP 0x88 (count 1)
[49673.127730] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49673.128017] usb 3-3: EP 0x88 closed
[49673.141142] usb 3-3: Open EP 0x8, iface=1:1, idx=0
[49673.141154] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=384000, periods=2, implicit_fb=0
[49673.141161] usb 3-3: Open EP 0x84, iface=1:1, idx=1
[49673.141168] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=384000, periods=2, implicit_fb=0
[49673.141174] usb 3-3: Setting usb interface 1:0 for EP 0x8
[49673.141334] usb 3-3: 1:1 Set sample rate 48000, clock 40
[49673.142388] usb 3-3: Setting params for data EP 0x8, pipe 0x41600
[49673.142399] usb 3-3: Set up 12 URBS, ret=0
[49673.142402] usb 3-3: Setting usb interface 1:1 for EP 0x8
[49673.142677] usb 3-3: Setting params for sync EP 0x84, pipe 0x21680
[49673.142682] usb 3-3: Set up 4 URBS, ret=0
[49673.144794] usb 3-3: Starting data EP 0x8 (running 0)
[49673.144922] usb 3-3: 12 URBs submitted for EP 0x8
[49673.144928] usb 3-3: Starting sync EP 0x84 (running 0)
[49673.144952] usb 3-3: 4 URBs submitted for EP 0x84
[49673.144957] usb 3-3: 1:1 Start Playback PCM
[49673.147134] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[49673.147146] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=384000, periods=2, implicit_fb=0
[49673.147154] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49673.147303] usb 3-3: 2:1 Set sample rate 48000, clock 40
[49673.149667] usb 3-3: Setting params for data EP 0x88, pipe 0x41680
[49673.149753] usb 3-3: Set up 12 URBS, ret=0
[49673.149759] usb 3-3: Setting usb interface 2:1 for EP 0x88
[49673.152046] usb 3-3: Starting data EP 0x88 (running 0)
[49673.152132] usb 3-3: 12 URBs submitted for EP 0x88
[49673.152140] usb 3-3: 2:1 Start Capture PCM
[49678.149591] usb 3-3: Stopping sync EP 0x84 (running 1)
[49678.149611] usb 3-3: Stopping data EP 0x8 (running 1)
[49678.149646] usb 3-3: 1:1 Stop Playback PCM
[49678.149723] usb 3-3: Closing EP 0x8 (count 1)
[49678.149726] usb 3-3: EP 0x8 closed
[49678.149728] usb 3-3: Closing EP 0x84 (count 1)
[49678.149730] usb 3-3: Setting usb interface 1:0 for EP 0x84
[49678.150382] usb 3-3: EP 0x84 closed
[49678.152669] usb 3-3: Stopping data EP 0x88 (running 1)
[49678.152730] usb 3-3: 2:1 Stop Capture PCM
[49678.154511] usb 3-3: Closing EP 0x88 (count 1)
[49678.154530] usb 3-3: Setting usb interface 2:0 for EP 0x88
[49678.154870] usb 3-3: EP 0x88 closed
- dmesg output, 2022-01-14
- clock source workaround is present
- `IMPLICIT_FB_GENERIC_DEV(0x1397, 0x0507),` line under playback_implicit_fb_quirks in /sound/usb/implicit.c (doesn't really change the feedback mode as per previous attempt)
- modprobe snd_usb_audio dyndbg==p implicit_fb=1`
- implicit feedback and no stuttering, but had to switch the profiles many times in pavucontrol
[49984.668880] usb 3-3: USB disconnect, device number 22
[50016.322880] usbcore: deregistering interface driver snd-usb-audio
[50020.574773] usbcore: registered new interface driver snd-usb-audio
[50028.188416] usb 3-3: new high-speed USB device number 23 using xhci_hcd
[50028.315600] usb 3-3: config 1 has an invalid interface number: 5 but max is 3
[50028.315614] usb 3-3: config 1 has no interface number 3
[50028.317833] usb 3-3: New USB device found, idVendor=1397, idProduct=0507, bcdDevice= 1.00
[50028.317843] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[50028.317847] usb 3-3: Product: UMC202HD 192k
[50028.317850] usb 3-3: Manufacturer: BEHRINGER
[50028.317852] usb 3-3: SerialNumber: 12345678
[50028.322197] usb 3-3: 1:1: added playback implicit_fb sync_ep 88, iface 2:1
[50028.322216] usb 3-3: 1:1: add audio endpoint 0x8
[50028.322234] usb 3-3: Creating new data endpoint #8
[50028.322238] usb 3-3: Creating new data endpoint #88
[50028.322398] usb 3-3: 1:1 Set sample rate 192000, clock 40
[50028.327205] usb 3-3: 2:1: add audio endpoint 0x88
[50028.327935] usb 3-3: 2:1 Set sample rate 192000, clock 40
[50028.545091] usb 3-3: [10] FU [PCM Playback Switch] ch = 2, val = 0/1/1
[50028.545114] usb 3-3: [10] FU [PCM Playback Switch] ch = 1, val = 0/1/1
[50028.548309] usb 3-3: [10] FU [PCM Playback Volume] ch = 2, val = -32512/0/256
[50028.551652] usb 3-3: [10] FU [PCM Playback Volume] ch = 1, val = -32512/0/256
[50028.552073] usb 3-3: [11] FU [Mic Capture Switch] ch = 2, val = 0/1/1
[50028.552083] usb 3-3: [11] FU [Mic Capture Switch] ch = 1, val = 0/1/1
[50028.555339] usb 3-3: [11] FU [Mic Capture Volume] ch = 2, val = -32512/0/256
[50028.558568] usb 3-3: [11] FU [Mic Capture Volume] ch = 1, val = -32512/0/256
[50028.710395] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[50028.710407] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[50028.710415] usb 3-3: Setting usb interface 2:0 for EP 0x88
[50028.710861] usb 3-3: 2:1 Set sample rate 48000, clock 40
[50028.714375] usb 3-3: Setting params for data EP 0x88, pipe 0x41780
[50028.714396] usb 3-3: Set up 12 URBS, ret=0
[50028.714402] usb 3-3: Setting usb interface 2:1 for EP 0x88
[50028.720445] usb 3-3: Closing EP 0x88 (count 1)
[50028.720455] usb 3-3: Setting usb interface 2:0 for EP 0x88
[50028.720976] usb 3-3: EP 0x88 closed
[50028.722099] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[50028.722108] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[50028.722116] usb 3-3: Setting usb interface 2:0 for EP 0x88
[50028.722379] usb 3-3: 2:1 Set sample rate 48000, clock 40
[50028.936263] usb 3-3: Setting params for data EP 0x88, pipe 0x41780
[50028.936294] usb 3-3: Set up 12 URBS, ret=0
[50028.936298] usb 3-3: Setting usb interface 2:1 for EP 0x88
[50028.936837] usb 3-3: Closing EP 0x88 (count 1)
[50028.936843] usb 3-3: Setting usb interface 2:0 for EP 0x88
[50028.937092] usb 3-3: EP 0x88 closed
[50028.937931] usb 3-3: Open EP 0x8, iface=1:1, idx=0
[50028.937937] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=1
[50028.937942] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[50028.937945] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[50028.937949] usb 3-3: Setting usb interface 1:0 for EP 0x8
[50028.938093] usb 3-3: 1:1 Set sample rate 48000, clock 40
[50028.939161] usb 3-3: Setting params for data EP 0x8, pipe 0x41700
[50028.939181] usb 3-3: Set up 12 URBS, ret=0
[50028.939185] usb 3-3: Setting usb interface 1:1 for EP 0x8
[50028.939666] usb 3-3: Setting usb interface 2:0 for EP 0x88
[50028.939814] usb 3-3: 2:1 Set sample rate 48000, clock 40
[50028.940905] usb 3-3: Setting params for data EP 0x88, pipe 0x41780
[50028.940920] usb 3-3: Set up 12 URBS, ret=0
[50028.940924] usb 3-3: Setting usb interface 2:1 for EP 0x88
[50028.941203] usb 3-3: Starting data EP 0x8 (running 0)
[50028.941208] usb 3-3: No URB submission due to implicit fb sync
[50028.941212] usb 3-3: Starting data EP 0x88 (running 0)
[50028.941317] usb 3-3: 12 URBs submitted for EP 0x88
[50028.943332] usb 3-3: Reopened EP 0x88 (count 1)
[50028.943370] usb 3-3: Closing EP 0x88 (count 2)
[50028.943996] usb 3-3: Reopened EP 0x88 (count 1)
[50028.944018] usb 3-3: Stopping data EP 0x88 (running 1)
[50028.944075] usb 3-3: Stopping data EP 0x8 (running 1)
[50028.945259] usb 3-3: Closing EP 0x8 (count 1)
[50028.945268] usb 3-3: Setting usb interface 1:0 for EP 0x8
[50028.945597] usb 3-3: EP 0x8 closed
[50028.945601] usb 3-3: Closing EP 0x88 (count 2)
[50028.945661] usb 3-3: Closing EP 0x88 (count 1)
[50028.945665] usb 3-3: Setting usb interface 2:0 for EP 0x88
[50028.945918] usb 3-3: EP 0x88 closed
[50028.959559] usb 3-3: Open EP 0x8, iface=1:1, idx=0
[50028.959567] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=1
[50028.959572] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[50028.959575] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=9600, periods=4, implicit_fb=0
[50028.959579] usb 3-3: Setting usb interface 1:0 for EP 0x8
[50028.959709] usb 3-3: 1:1 Set sample rate 48000, clock 40
[50028.960828] usb 3-3: Setting params for data EP 0x8, pipe 0x41700
[50028.960846] usb 3-3: Set up 12 URBS, ret=0
[50028.960851] usb 3-3: Setting usb interface 1:1 for EP 0x8
[50028.961210] usb 3-3: Setting usb interface 2:0 for EP 0x88
[50028.961386] usb 3-3: 2:1 Set sample rate 48000, clock 40
[50028.962494] usb 3-3: Setting params for data EP 0x88, pipe 0x41780
[50028.962510] usb 3-3: Set up 12 URBS, ret=0
[50028.962515] usb 3-3: Setting usb interface 2:1 for EP 0x88
[50028.962812] usb 3-3: Starting data EP 0x8 (running 0)
[50028.962821] usb 3-3: No URB submission due to implicit fb sync
[50028.962825] usb 3-3: Starting data EP 0x88 (running 0)
[50028.962926] usb 3-3: 12 URBs submitted for EP 0x88
[50028.963966] usb 3-3: Reopened EP 0x88 (count 1)
[50028.964002] usb 3-3: Closing EP 0x88 (count 2)
[50028.965081] usb 3-3: Reopened EP 0x88 (count 1)
[50028.965121] usb 3-3: Stopping data EP 0x88 (running 1)
[50028.965210] usb 3-3: Stopping data EP 0x8 (running 1)
[50028.967243] usb 3-3: Closing EP 0x8 (count 1)
[50028.967252] usb 3-3: Setting usb interface 1:0 for EP 0x8
[50028.967827] usb 3-3: EP 0x8 closed
[50028.967833] usb 3-3: Closing EP 0x88 (count 2)
[50028.967904] usb 3-3: Closing EP 0x88 (count 1)
[50028.967909] usb 3-3: Setting usb interface 2:0 for EP 0x88
[50028.968129] usb 3-3: EP 0x88 closed
[50028.977906] usb 3-3: Open EP 0x8, iface=1:1, idx=0
[50028.977932] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=384000, periods=2, implicit_fb=1
[50028.977941] usb 3-3: Open EP 0x88, iface=2:1, idx=0
[50028.977947] usb 3-3: channels=2, rate=48000, format=S32_LE, period_bytes=384000, periods=2, implicit_fb=0
[50028.977955] usb 3-3: Setting usb interface 1:0 for EP 0x8
[50028.978116] usb 3-3: 1:1 Set sample rate 48000, clock 40
[50028.979233] usb 3-3: Setting params for data EP 0x8, pipe 0x41700
[50028.979250] usb 3-3: Set up 12 URBS, ret=0
[50028.979257] usb 3-3: Setting usb interface 1:1 for EP 0x8
[50028.979630] usb 3-3: Setting usb interface 2:0 for EP 0x88
[50028.979811] usb 3-3: 2:1 Set sample rate 48000, clock 40
[50028.981603] usb 3-3: Setting params for data EP 0x88, pipe 0x41780
[50028.981621] usb 3-3: Set up 12 URBS, ret=0
[50028.981627] usb 3-3: Setting usb interface 2:1 for EP 0x88
[50028.982096] usb 3-3: Starting data EP 0x8 (running 0)
[50028.982104] usb 3-3: No URB submission due to implicit fb sync
[50028.982108] usb 3-3: Starting data EP 0x88 (running 0)
[50028.982202] usb 3-3: 12 URBs submitted for EP 0x88
[50028.984552] usb 3-3: 1:1 Start Playback PCM
[50028.985846] usb 3-3: Reopened EP 0x88 (count 1)
[50028.987265] usb 3-3: Starting data EP 0x88 (running 1)
[50028.987277] usb 3-3: 2:1 Start Capture PCM
