Here is what dmesg says after I plug the thing in as a usb2 device
[ 2384.749399] usb 1-2: USB disconnect, device number 2
[ 2390.729825] usb 1-2: new high speed USB device number 3 using ehci_hcd
[ 2390.863654] generic-usb 0003:0926:0202.0003: hiddev0,hidraw0: USB HID
v1.01 Device [Sound Devices USBPre2] on usb-0000:00:02.1-2/input3
it does seem to recognize it correctly....
This is dmesg after I try to use it/start jackd or directly with alsa.
[ 2418.388135] cannot submit syncpipe for urb 0, error -90: internal error
I didn't try the patch as I dont have any experience compiling kernels,
but if it's in 3.2 it should be out soon...
On 11/28/2011 09:33 AM, Clemens Ladisch wrote:
>
> Matthieu has posted a follow-up patch on linux-usb:
>
> diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
> index 56a3203..464b451 100644
> --- a/drivers/usb/host/ehci-sched.c
> +++ b/drivers/usb/host/ehci-sched.c
> @@ -1475,6 +1475,7 @@ iso_stream_schedule (
> * jump until after the queue is primed.
> */
> else {
> + int done = 0;
> start = SCHEDULE_SLOP + (now& ~0x07);
>
> /* NOTE: assumes URB_ISO_ASAP, to limit complexity/bugs */
> @@ -1491,19 +1492,23 @@ iso_stream_schedule (
> /* check schedule: enough space? */
> if (stream->highspeed) {
> if (itd_slot_ok(ehci, mod, start,
> - stream->usecs, period))
> + stream->usecs, period)) {
> + done = 1;
> break;
> + }
> } else {
> if ((start % 8)>= 6)
> continue;
> if (sitd_slot_ok(ehci, mod, stream,
> - start, sched, period))
> + start, sched, period)) {
> + done = 1;
> break;
> + }
> }
> } while (start> next);
>
> /* no room in the schedule */
> - if (start == next) {
> + if (!done) {
> ehci_dbg(ehci, "iso resched full %p (now %d max %d)\n",
> urb, now, now + mod);
> status = -ENOSPC;
>
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