[LAU] Has Linux kernel gone mad?

[Erik Schoster]

There was a very useful looking thread about this around March 30th of 2019 on this mailing list which I've kept bookmarked -- one reference in there is this thread on the linux musicians forum: https://linuxmusicians.com/viewtopic.php?f=6&t=18046

Somewhere in there I think I remember someone finding a version of the MOTU firmware that they found to work reliably with linux, I haven't dug it up yet but maybe I will this weekend -- would be nice to reclaim this device!

I was surprised after a couple years of basically no issues with it then transferring it to be used on a mac in a shared environment for a while (where the firmware was upgraded continuously) to find when I reclaimed it that it no longer worked under linux... I have the clock sync issue that sounds like a bitcrushed LFO going from a clean sounding signal and then sputtering out into silence and back again over the course of a minute or two...

All to say I'm hopeful that rolling the firmware back is all that's needed but maybe someone with more recent direct experience can chime in!

On Fri, Mar 6, 2020, at 11:28 AM, John Murphy wrote:
> They say that doing the same thing repeatedly, while expecting
> a different result, is a sign of madness.
> 
> I've been trying to discover why my MOTU Ultralite AVB doesn't
> work on Linux Mint 19.3 (5.3.0-40-generic) and see the following
> in /var/log/syslog, which confirms, a total of 240 times, that:
> 
> "usb 1-14: clock source 1 is not valid"
> 
> I'm trying to dual boot. (Kernel 'thinks' my gaming wheel is a
> mouse, so I had to make a udev rule for that.) and the MOTU is
> usually synced to an external optical source at 48kHz. The boot
> process appears to switch it to 192kHz briefly and then to 44.1k
> which isn't going to be a good source because it's 48kHz.
> 
> Anyone using a MOTU with a modern Linux ubuntu flavour could help?
> 
> Relevant part of syslog below sig separator.
> 
> -- 
> Thanks in advance.
> 
> /var/log/syslog:
> 
> Mar 5 20:40:40 mint01 kernel: [ 423.774917] usb 1-14: new high-speed USB device number 9 using xhci_hcd
> Mar 5 20:40:40 mint01 kernel: [ 423.944393] usb 1-14: New USB device found, idVendor=07fd, idProduct=0005, bcdDevice= 2.00
> Mar 5 20:40:40 mint01 kernel: [ 423.944398] usb 1-14: New USB device strings: Mfr=1, Product=2, SerialNumber=3
> Mar 5 20:40:40 mint01 kernel: [ 423.944402] usb 1-14: Product: UltraLite AVB
> Mar 5 20:40:40 mint01 kernel: [ 423.944405] usb 1-14: Manufacturer: MOTU
> Mar 5 20:40:40 mint01 kernel: [ 423.944407] usb 1-14: SerialNumber: munged
> Mar 5 20:40:40 mint01 mtp-probe: checking bus 1, device 9: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-14"
> Mar 5 20:40:40 mint01 mtp-probe: bus: 1, device: 9 was not an MTP device
> Mar 5 20:40:40 mint01 kernel: [ 423.970417] mc: Linux media interface: v0.10
> Mar 5 20:40:40 mint01 kernel: [ 423.994249] usb 1-14: clock source 1 is not valid, cannot use
> Mar 5 20:40:41 mint01 kernel: [ 424.832923] usb 1-14: clock source 1 is not valid, cannot use
> Mar 5 20:40:41 mint01 kernel: [ 424.844172] usbcore: registered new interface driver snd-usb-audio
> Mar 5 20:40:41 mint01 upowerd[1340]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-14
> Mar 5 20:40:41 mint01 upowerd[1340]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-14/1-14:1.1
> Mar 5 20:40:41 mint01 upowerd[1340]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-14/1-14:1.3
> Mar 5 20:40:41 mint01 upowerd[1340]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-14/1-14:1.4
> Mar 5 20:40:41 mint01 upowerd[1340]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-14/1-14:1.2
> Mar 5 20:40:41 mint01 upowerd[1340]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-14/1-14:1.0
> Mar 5 20:40:41 mint01 kernel: [ 424.881343] usb 1-14: clock source 1 is not valid, cannot use
>  (previous line repeated 40 times)
> Mar 5 20:40:44 mint01 pulseaudio[1302]: [pulseaudio] module-alsa-card.c: Failed to find a working profile.
> Mar 5 20:40:44 mint01 pulseaudio[1302]: [pulseaudio] module.c: Failed to load module "module-alsa-card" (argument: "device_id="1" name="usb-MOTU_UltraLite_AVB_0001f2fffe005ded-00" card_name="alsa_card.usb-MOTU_UltraLite_AVB_0001f2fffe005ded-00" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes card_properties="module-udev-detect.discovered=1""): initialization failed.
>  (all repeated 6 times)
> Mar 5 20:40:44 mint01 pulseaudio[1302]: [pulseaudio] module-udev-detect.c: Tried to configure /devices/pci0000:00/0000:00:14.0/usb1/1-14/1-14:1.0/sound/card1 (alsa_card.usb-MOTU_UltraLite_AVB_0001f2fffe005ded-00) more often than 5 times in 10s
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