I have requested an RMA from Schiit to sort out the issue with my Gungnir, but wanted to solicit some possible ideas and solutions for what could otherwise be an issue with Linux and not the Gungnir. The issue I'm having is that no Linux distro, including Debian and Red Hat derivatives, will recognize the Gungnir via USB anymore. This is kind of tedious, so bear with me... I migrated to Linux from Windows on my laptop over a year ago. Running Ubuntu Mate 14.04, I had no issues. I replaced my desktop with a computer I built and installed Ubuntu 14.04, again, I had no issues. Then early last summer, both my laptop and desktop would have difficulty recognizing the Gung, running the above same distros. It would take some finagling to get the Gung recognized, but eventually I was able to get the USB working (detailed below). Finally, this past autumn, I could no longer coax the Gung to be recognized, with or without the Wyrd. The only thing that would work was a Doodlebug usb isolation device inserted between one of the computers and the Gung. I currently have Fedora 25 installed on my laptop and desktop. I even re-installed Ubuntu 14.04 and 16.04 on a separate hard drive in my desktop, and still no love. I could maybe try installing a low latency kernel to improve throughput? Anyways, here is a brief summary of the Gung's clinical presentation/symptoms: -As I said above, the Gung via USB started getting flaky last summer. I could get USB recognized sometimes by playing a CD with SPDIF/coax input and then switch to USB input. This trick eventually stopped working and I resorted to inserting the Doodlebug between the computers and Gung for USB playback. -The Gung will only work via USB in Linux with the Doodlebug. It will not work with or without a Wyrd and Linux. -The Gung works just fine with my old 9 year old desktop running W7 and the CMEDIA drivers. This computer sits in my closet, I only pulled it out to test the Gung, and I have no desire to go back to Windows. -My AMB y2 and Oppo HA-2 portable amp/DAC are both recognized by my desktop and laptop running Linux. These are two different DACs that claim USB playback is plug and play, and do play with Linux without issue. I am able to look under Sound Settings in the desktop environment as well as via Terminal with the command 'aplay -l' to view output devices. If the DAC is recognized, it shows up in both places, if the DAC is not recognized, it doesn't show up at all. Both my desktop and laptop are unable to recognize the Gung in either Sound settings or Terminal. -Both the desktop and laptop will not power on, power off, nor restart with the Gung plugged in. For example, when restarting from the desktop environment, it hangs indefinitely at the splash screen, even after I turn off the Gung - it isn't until I remove the USB cable that the computer will reboot. -I've tried multiple, quality/non-audiophile USB 2.0 cables from Hosa and Qualtek. These cables work with either the y2 and Oppo HA-2. I have also tried every USB port in my desktop and laptop. Thoughts or ideas? I am comfortable with the CLI and editing configuration files. I have also played around with Pulse Audio, turning off autospawn and disabling PA, but still no love.