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@cubase:~$ 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
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