Hi Clemens and all alsa-users list members, On 2009-10-09 14:14:59 Clemens Ladisch wrote: > Samuel Gilbert wrote: > > - Sound is never crystal clear > > > > - A ramdom amount of time after having the sound starts to degrade. > > What kind of degrdation? It's kind of hard to describe. It's not clicking or cracking... You can still make out the original music, but there are other electronic noises on top. As time goes on, there is more noise than music. My tests have shown that the driver configures itself for 2 channels at 44.1KHz, 16 bits. This is the same sampling frequency as the music files I'm playing. I'l try to produce a recording of what comes out of my speakers. Any peticular song you would like to listen to? ;-) > > > - 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 > > This might indicate a software problem, most likely in the USB > controller driver. Try connecting through a hub, or not. I will try that. I have tried with evry single USB port on both computers (more than 8 on each) and lsusb revealed that most of the time, the sound card got routed to the same USB host controller (OHCI on both computers. Never EHCI (Device is USB 1.1)). > > > What can I do to identify if the problem is related to the hardware, the > > driver or the lib? > > It's unrelated to lib. What kernel versions have you tried? I've tried a lot of kernel versions : - 2.6.27.35 (Arch Linux LTS) - 2.6.29.3 - 2.6.29.6 - 2.6.30.5 - 2.6.31 The problem occurs regardless of the version of the libs and distro (Tried Arch, Funtoo and Kubuntu) > > > The fact that my USB sound card still works flawlessly on > > my old computer > > ... might indicate that one has an OHCI controller and the other one > UHCI. Apparently, the driver for one of them is buggy. > Both computers have OHCI controllers. > > Best regards, > Clemens Thank you for your help! Samuel ------------------------------------------------------------------------------ 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
