I am really confused about why my DAC won't work on my laptop.
Devices: win 10 thinkpad, wyrd (a glorified powered usb hub), a DAC (schiit gungnir). Also for control I have a surface pro (win 10) and a set of SONY speakers with a DAC (CAS-1).
What I am trying to do: connect the laptop to the schiit DAC and play music with it, via the WYRD or not.
Problem: The laptop won't recognize the DAC if connected directly, as in it doesn't even show up in the device manager as an unknown device. It just doesn't show up.
If I connect the laptop to the WYRD, then connect the WYRD to the DAC, the laptop reads it as an unknown device.
In more details. When the usb is plugged, the laptop pops a window telling me the USB device is not recognized, and suggests me to reconnect it (which obviously doesn't work). And in the device manager, it shows up as "Unknown USB device (Device Description Request Failed)". In the events the device is not started, the configured (usb.inf), then not migrated.
But things got more complicated here.
If I connect laptop to the wyrd then to the sony DAC/speakers, it works perfectly fine. So the wryd should be performing normally.
If I connect the DAC directly to the Surface pro, they work perfectly well too. So the DAC should be fine.
But if I connect the surface pro to the wyrd, and the wyrd to the schiit DAC, the surface pro reports the exactly same problem the laptop reported when it was connecting to the wyrd then the DAC.
And for control, the laptop and the surface pro work with the sony DAC, with or without the wyrd connected in the middle.
Edit: while I am typing this, the laptop->wyrd->sony DAC connection failed. It now displays a little red circle with white cross in it on the sound symbol. Removing the wyrd and connect the laptop directly to the sony DAC made no difference.
Things I have tried:
I have disabled fast startup, and tweaked the usb power management so that it doesn't shut down by itself. I downloaded the driver for the schiit DAC, but it won't install because it cannot detect a schiit device (either connected directly or via the wyrd). (The surface pro has a working schiit driver.)
I have tried to update the driver for the unknown device in the device manager, but it told me that the "unknown device ((Device Description Request Failed)" is the best driver for me.
I have re-installed the chipset update provided for my laptop and the realtek driver, uninstalled and re-installed drivers for all the usb hubs, updated the BIOS. The win 10 system is also up to date.
I have tried to use the registry method provided by Schiit, but I cannot find the "EnhancedPowerManagementEndabled" item.
I have also turned off the laptop, unplugged it, and let it sit for ~2 minutes. I plan on doing this again for 15 minutes after posting this and fixing the just occurred sony DAC problem.
END
Please help, I am running out of ideas of what to check. I am not even sure which device is malfunctioning here. Any input will be appreciated.
Submitted April 25, 2018 at 02:40PM by zdy132 https://ift.tt/2qWZJS0
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