Hi, > I submitted a bug report on the matter some time ago > (https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2607), see there > for detailed description. Short description: Quattro initializes itself > to an unusable (or semi-usable) state and refuses to change its mode > afterwards. > > After seeing no activity on the bug for some time I decided to > investigate the problem further. First I tried to extend the Audiophile > hack to Quattro (that disables all altsettings on driver init except the > one desired). Surprisingly it worked - almost. It only works the first > time after Quattro has been powered up, after that, re-loading the > driver doesn't help - the device sticks to the old state. Yes that's the same for the audiophile Usb device: I have to turn off the audiophile usb card, then deregister (modprobe -r) the driver, and register it back with a device_setup parameter corresponding to the new device mode. > Are there any suggestions on how to make the device accept the changing > settings? Perhaps there's a need for hardware reset or something similar > between mode changes? Any suggestions/patches are appreciated. The windows driver only selects AltSettings 0 for all interfaces "multiple times" before switching modes. I tried to implement this but with no success. That's why I didn't included this in the first Audiophile USB patch. However I'm still interrested in a way to do this. Another 'M-audio usb' user recently wrote a patch for the Fast track pro (however I'm not sure it has been included in the hg repository yet). I wonder if he had managed to handle such setup switching for his device. Regards, Thibault ------------------------------------------------------------------------- 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 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
