Christopher Montgomery wrote: > On 7/22/06, Ian Stirling <[EMAIL PROTECTED]> wrote: > > Basically - playing sound with > > mplayer -ao alsa:device=hw=1 or whatever - and then unplugging the > > soundcard completely wedges lsusb/usb configuration, until the > > mplayer process is killed. > > This sounds like the well known EPIPE problem in usb-audio and one I > intended to fix after dealing with the ehci scheduler. > > It boils down to this: although the low-level usb code is properly > reporting and distinguishing error conditions, usb-audio translates > just about everything that goes wrong into 'EPIPE'. Because an > application has no way to distinguish temporary from permanent errors
The PCM device must be reinitialized (snd_pcm_prepare()) before playback can continue. If this reinitialization fails, the error is permanent. > it immediately retries and gets another EPIPE. This is a bug in mplayer, its internal audio output interface has no way to signal a permanent error. Regards, Clemens ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
