Couldn't reestablish output after unplug USB DAC about squeezelite HOT 4 CLOSED

Sounds like a udev issue, not a Squeezelite issue.  Try removing/reinserting the USB DAC kernel driver and restart udev using the techniques described here: What is the correct way to restart udev? | | | | | | | | | | | What is the correct way to restart udev? I've changed the name of my eth1 interface to eth0. How to ask udev now to re-read the config? service udev res... | | | On Tuesday, January 8, 2019, 9:24:56 AM EST, Ka Yue Yeung <[email protected]> wrote: If I disconnect my USB DAC while LMS is playing, LMS could no longer reestablish any USB connection until I reboot my Pi 3. Just re-plugging the USB DAC back won't reestablish sound. I tried to restart Squeezelite and LMS service but none of them helps. Rebooting the device is the only way help LMS establish USB connection. I got the following error (looping) after unplug the USB DAC. [22:11:44.506807] output_thread:776 pcm wait error: Input/output error [22:11:44.506898] output_thread:763 start error: File descriptor in bad state [22:11:44.516943] output_thread:763 start error: File descriptor in bad state [22:11:44.526985] output_thread:763 start error: File descriptor in bad state [22:11:44.537027] output_thread:763 start error: File descriptor in bad state The DAC I'm using is RME ADI-2 DAC. Orginally repotted at https://forums.slimdevices.com/showthread.php?109934-LMS-could-not-reestablish-any-USB-connection-after-USB-Dac-is-disconnected — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or mute the thread.

Glad you figured it out.  USB audio can get very weird. DB On Thursday, January 10, 2019, 8:29:38 PM EST, Ka Yue Yeung <[email protected]> wrote: Found a solution: https://forums.slimdevices.com/showthread.php?109934-LMS-could-not-reestablish-any-USB-connection-after-USB-Dac-is-disconnected/page2 I had a similar situation with the USB DAC in a Hypex DLCP. The list of available output devices offered when this DAC is connected to a Pi 3B+ running piCorePlayer 4.1.0 is: null sysdefault:CARD=DAC front:CARD=DAC,DEV=0 surround21:CARD=DAC,DEV=0 surround40:CARD=DAC,DEV=0 surround41:CARD=DAC,DEV=0 surround50:CARD=DAC,DEV=0 surround51:CARD=DAC,DEV=0 surround71:CARD=DAC,DEV=0 iec958:CARD=DAC,DEV=0 I first tried the top option 'sysdefault:CARD=DAC', and that seemed to work and play music properly. But whenever the DAC was disconnected (e.g. when using the DLCP USB input for programming the DLCP), it required a reboot of the Pi for Squeezelite to find the DAC again. The solution for me was to use the next option in the list, 'front:CARD=DAC,DEV=0'. This is totally robust, in that I can disconnect the DAC, and when I reconnect (even to a different USB port on the Pi), the music just magically starts playing again almost immediately - I don't even need to restart Squeezelite. — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or mute the thread.