[LAU] Lexicon Lambda USB - are my lockups due to the hardware or software?

Hi all, Ubuntu Xenial 16.04 LTS, kernel 4.4.0, kxstudio. I have a problem
with my Lexicon Lambda soundcard (new to me, purchased second-hand).

Every now and then, it seems to lock up when I have Jack and Ardour
running. syslog contains many lines like:
15 Apr 10 10:35:01 cubase kernel: [ 1072.193677] usb 3-3: 1:2: cannot get
freq at ep 0x1
16 Apr 10 10:35:01 cubase kernel: [ 1072.195991] usb 3-3: 2:2: cannot get
freq at ep 0x82

I found a post https://www.spinics.net/linux/fedora/alsa-user/msg01899.html
suggesting that this device flouts the USB spec, and sure enough:
antony@email-addr-hidden:~$ lsusb -s3:8 -v |grep -E
"(bNumInterfaces|bInterfaceNumber)" |sort|uniq
                                            Couldn't open device, some
information will be missing
      bInterfaceNumber 0
      bInterfaceNumber 1
      bInterfaceNumber 2
      bInterfaceNumber 4
      bInterfaceNumber 6
      bInterfaceNumber 7
    bNumInterfaces 6

I seem to have to hard-reset the card, kill and restart pulseaudio (8.0)
and jackd (1.9.11). My concrete questions are:
Am I wasting my time with this card?
Are the errors purely cosmetic (and something in software is locking up?)

Antony

-- 
http://www.linkedin.com/in/antgel
http://about.me/antonygelberg

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Received on Mon Apr 10 12:15:01 2017