At 6:21 PM +0100 11/27/12, Clemens Ladisch wrote:
Daniel Griscom wrote:
[ 432.591698] ALSA sound/usb/pcm.c:1163 packet 0 failed: -18 [ 432.591702] ALSA sound/usb/pcm.c:1163 packet 1 failed: -18 [ 432.592684] ALSA sound/usb/pcm.c:1163 packet 0 failed: -18 [ 432.592702] ALSA sound/usb/pcm.c:1163 packet 0 failed: -18 [ 432.592706] ALSA sound/usb/pcm.c:1163 packet 1 failed: -18 [ 432.593684] ALSA sound/usb/pcm.c:1163 packet 0 failed: -18 [ 432.593701] ALSA sound/usb/pcm.c:1163 packet 0 failed: -18 [ 432.593705] ALSA sound/usb/pcm.c:1163 packet 1 failed: -18 [ 432.594680] ALSA sound/usb/pcm.c:1163 packet 0 failed: -18
These packet numbers never get above 1. Are you using two microframes per URB?
We are using a bInterval value of 1 (on a high-speed device). We've recently tried bumping this up to 2, and the problem was no longer evident, but given the difficulty in reproducing it I wasn't at all clear that we hadn't just moved it to a different set of reproduce conditions.
... is that what you meant?
What is the ALSA buffer size?
We're handing a value of 3072 to snd_pcm_hw_params_set_buffer_size_near().
Regards, Clemens
Thanks, Dan