[alsa-devel] snd-usb-audio dying on jackd xruns
So I start jackd and it runs fine for a while. Then ALSA crashes and triggers an xrun. Jackd continues to do its merry thing - minus the part about spitting info out to my soundcard...
At first I thought this was a Jackd issue but when I looked deeper it seems to be ALSA. Once this happens I cannot restart jackd and resume an audio session. In fact, I cannot even rmmod snd-usb-audio. Sometimes I cannot lsusb. So it looks like something is getting seriously hosed!
It seems to be specific to my machine.
I've tried multiple usb intefaces. All work fine with other computers. I've tried multiple version of Ubuntu with various versions of ALSA on this machine. All exhibit the same behavior. I have 3 other machines that run these interfaces just fine... So it seems to be a hardware compatibility issue not a software glitch in one version.
I've tried many boot flags but to no avail. I'm at a loss on how to troubleshoot.
The machine is M4N75TD motherboard with a Phenom II 1055T and the latest bios flash.
Please advise,
...Rods ;-)
Rods Bobavich wrote:
So I start jackd and it runs fine for a while. Then ALSA crashes and triggers an xrun. Jackd continues to do its merry thing - minus the part about spitting info out to my soundcard...
At first I thought this was a Jackd issue but when I looked deeper it seems to be ALSA. Once this happens I cannot restart jackd and resume an audio session. In fact, I cannot even rmmod snd-usb-audio. Sometimes I cannot lsusb. So it looks like something is getting seriously hosed!
Looks like a bug in the USB controller driver, probably triggered by some unexpected behaviour of your USB controller.
When this happens, are there any error messages in the system log?
Regards, Clemens
Clemens,
USB bug. This is exactly what I thought. Here's a tail of the syslog:
Feb 2 11:04:45 studio1 kernel: [ 997.880412] ALSA pcm.c:226: setting usb interface 2:1 Feb 2 11:04:45 studio1 kernel: [ 997.889440] ALSA pcm.c:226: setting usb interface 1:1 Feb 2 11:05:03 studio1 kernel: [ 1015.338527] CE: hpet increased min_delta_ns to 7500 nsec Feb 2 11:05:28 studio1 kernel: [ 1040.071773] ALSA urb.c:146: timeout: still 7 active urbs.. Feb 2 11:05:34 studio1 kernel: [ 1046.070072] ALSA urb.c:146: timeout: still 2 active urbs.. Feb 2 11:05:56 studio1 kernel: [ 1068.660883] ALSA pcm.c:223: 4:2:1: usb_set_interface failed
It seems that the error happened about the time of the hpet increase. Do we have a timer problem?
...Rods ;-)
On Wed, Feb 2, 2011 at 10:33, Clemens Ladisch clemens@ladisch.de wrote:
Rods Bobavich wrote:
So I start jackd and it runs fine for a while. Then ALSA crashes and triggers an xrun. Jackd continues to do its merry thing - minus the part about spitting info out to my soundcard...
At first I thought this was a Jackd issue but when I looked deeper it
seems
to be ALSA. Once this happens I cannot restart jackd and resume an audio session. In fact, I cannot even rmmod snd-usb-audio. Sometimes I cannot lsusb. So it looks like something is getting seriously hosed!
Looks like a bug in the USB controller driver, probably triggered by some unexpected behaviour of your USB controller.
When this happens, are there any error messages in the system log?
Regards, Clemens
participants (2)
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Clemens Ladisch -
Rods Bobavich