My current, broken kernel: > > > > > uname -srv > > > > > Linux 3.14-2-amd64 #1 SMP Debian 3.14.13-2 (2014-07-24)
Working kernel: > uname -a > Linux avignon 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 > UTC 2014 x86_64 x86_64 x86_64 GNU/Linux I still have Debian kernels 3.13-1 and 3.12-1 installed so I booted with each of them. 3.13-1 exhibits the same problems as 3.14-2. 3.12-1 works properly! *** tested with aplay: aplay -D plughw:DragonFly <file>.wav uname -srv Linux 3.12-1-amd64 #1 SMP Debian 3.12.9-1 (2014-02-01) Devices 'iec598:DragonFly' and 'hw:DragonFly' work if the source is 24 bit. > > I don't know why this is, but I spent a long time trying to figure > out what was "wrong" with my configuration, the kernel, the Alsa > driver, etc etc when I finally in desperation plugged the card into > one of the other USB ports and POOF all worked fine. > > So, if you have a different set of USB ports or a different machine > to try, you might want to give that a go first. My machine is a Thinkpad X200 with dock. I tested USB ports on both sides of the Thinkpad and the dock ports. Also I tested without any other USB devices present but none of that helped. I just thought of this.. maybe I should test on my monitor's USB hub. I lack the necessary USB A-B cable at the moment. I tested using Foobar on Win7 in my university's library on a Dell machine and the DAC worked properly. I don't have other Linux machines at the moment to test with. > > Beyond that, I have a completely vanilla configuration (no messing > with Alsa configuration files). I continue to let Pulse Audio live > on my system, and the default sound card is the Intel stuff delivered > with the machine. So all alerts and system audio go through that > subsystem, and only Guayadeque uses the Dragonfly. I don't have pulse installed. I did have pulse installed before I got the DAC but I uninstalled it during testing of this issue. I have jack installed but it isn't running. I installed jack during testing of this issue and I learned something about it: jack uses padded s32le for 24 bit devices. If the device doesn't support s32le it falls back to s16le. 'true' 24 bit in jack is currently unavailable: http://linux-audio.com/jack/ jack wouldn't work with the DAC in any configuration except for 96000 kHz 16 bit, which is interesting. I didn't include my jack results earlier because it is seems irrelevant. > > Also, generally I plug in the Dragonfly after the machine is booted, > so all other audio configuration is probably pretty stable and > configured by the time that happens. I have tried both methods with the newer kernels but neither works. The working 3.12 kernel is with device plugged in from boot. > > > Let me know if you want me to collect any more data for you from my > end. My lsusb -v for DragonFly in Debian kernel 3.12-1 is identical to Ubuntu kernel 3.13.0-32. My lsusb -v for DragonFly in Debian kernel 3.14-2 has different section order and an extra section to Ubuntu 3.13.0-32. Additional section: AudioStreaming Interface Descriptor: bLength 20 bDescriptorType 36 bDescriptorSubtype 1 (AS_GENERAL) bTerminalLink 5 bDelay 1 frames wFormatTag 1 PCM Where can I view and submit bug reports for snd_usb_audio? I've been trying to figure that out to determine if something is already filed for this but I cannot seem to locate the proper place. I tried to test Ubuntu 14.04.1 but the USB drive didn't boot. I'll try again. Thanks! Adam ------------------------------------------------------------------------------ Infragistics Professional Build stunning WinForms apps today! Reboot your WinForms applications with our WinForms controls. Build a bridge from your legacy apps to the future. http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
