Hello, I own a Hifidiy Mini USB DAC (http://us.hifidiy.net/Article.asp?ArticleId=215) based on a TI Burr-Brown DAC (http://focus.ti.com/docs/prod/folders/print/pcm1793.html). It has works flawlessly with my old computer. Now, I have built a new machine and I'm having problems. Here are the symptoms : - Sound is never crystal clear - A ramdom amount of time after having the sound starts to degrade. This always happens. It may take a few seconds or it may take sevral hours. - Playback will continue with the sound getting more and more garbeled. - This happens regardless of the player (MPlayer, Amarok, Kaffeine, etc...) - When I stop the playback, I get an error message in dmesg : [ 2211.734042] ALSA sound/usb/usbaudio.c:923: timeout: still 3 active urbs.. [ 2211.734061] ALSA sound/usb/usbaudio.c:871: cannot submit datapipe for urb 0, error -22: internal error [ 2216.766358] usb 3-2: amarokapp timed out on ep0out len=0/0 - If I stop playback after the start of the problems, and try to start it again, the player will complain about not being able to open the device and I get the following message in dmesg : [ 2221.770657] ALSA sound/usb/usbaudio.c:1335: 2:1:1: usb_set_interface failed - Once the problem occured, the command "modprobe -r snd_usb_audio" will just hang. Mesures and test I have done : - Since I wan't sure if this is a sofware or a hardware issue, I took the hard drive from my old machine and installed it in the new one thus using the exact same software. The still problem occurs. - I have added a few printks to usbaudio.c and to try get a trace of which fnctions are called. Both my computers are based on ASUS motherboards with NVidia chipsets. The new machine is based an NVidia MCP78S. The old one is based on an NVidia MCP55. What can I do to identify if the problem is related to the hardware, the driver or the lib? The fact that my USB sound card still works flawlessly on my old computer and that all other USB hardware works without any problem on the new one lead me to beleive that the problem is in the way the snd_usb_audio driver interacts with the MCP78S, but I may be looking at the wrong place. Since the error message I get is pretty similar to what was already posted in Mantis 0002128 (https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2128), I have added further info there. Any help, pointers, and insults ;-) are of course welcome! Prozzaks ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
