On Mon, Aug 05, 2013 at 11:30:26PM +0200, Sergheu Mihai wrote: > Since a couple on months, I'm using an external usb sound card(Scarlett > Focusrite 2i2) for some audio production. > > I use it mainly with jackd, zynaddsubfx, fluidsynth. > > Constantly I face some sound freezes when using the card and the kernel > reports > me the following: > [89828.051969] cannot submit urb (err = -18) > [89828.051974] cannot submit urb (err = -18) > [89828.051982] cannot submit urb (err = -18) > [89828.051988] cannot submit urb (err = -18)
Hi Sergheu, In this context errno 18 (EXADEV) could mean that audio data is arriving at the USB stack too late. I'm wondering if it's simply that the userland programs can't keep up. Was it working correctly when you first bought it, and if so, which is the last kernel version that it worked on? Does it freeze when playing simple audio (.wav files for example)? Using the synth programs, are you just playing back prerecorded sounds? Are you using it as a live musical instrument (pressing buttons and needing the sound to change immediately)? What's the load / cpu usage on your laptop just before the sound freezes? Could you try turning off swap (to eliminate a cause of latency)? >From the hardware, I'm guessing it's an old laptop. Please could you retest on a more powerful PC? Regards, Steve -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
