Core Machine (Operating system/System info/Roon build number)
Zenith mk 3 as Roon player and and another computer as Roon Core.
Network Details (Including networking gear model/manufacturer and if on WiFi/Ethernet)
Audio Devices (Specify what device you’re using and its connection type - USB/HDMI/etc.) LH labs Vi Dac.
Description Of Issue
If I do upsampling to DSD256 in this setting, no signal and sound output to my DAC. However, it can work if upsampling to DSD128, why?
Have you reached out to Innuos support regarding this issue? They will likely be in a better position to assist you as they use their own DSD on Linux implementation.
This is a matter between the DAC and Innuos. But what options do you see in Roon and do those options actually differ from any options you see in the Innuos setup?
The normal limit without patches is DSD128 DOP on a Linux OS. The only way to get more is to patch the OS so it sees and uses that additional capability for that particular DAC. The way I see this, you need to speak to Innuos to confirm if what you are seeing is expected behaviour. Roon appears to be doing what it is supposed to do.