Mouse integration is not top priority right now. Consider passing through a hardware mouse. If you can't or won't...
- Have you tried hitting Scroll Lock to toggle mouse capture mode?
- Disable guest mouse acceleration (see: Read me first!)
- Yes, sometimes the cursor position doesn't update until you click. It's a QEMU problem. See points above.
Your guest GPU almost certainly supports DXGI. Use DxDiag to confirm that you have support for WDDM 1.2 or greater.
- The server-side (guest) probing error "Capture is not possible, unsupported device or driver" indicates NVidia duplication has failed, not that DXGI has failed.
- You can make the error go away by specifying "-c DXGI"
You don't need Display Spice enabled. Looking Glass has a Spice client built in to provide some conveniences, but you can disable it with the "-s" argument.
- Note that without Spice, you will not be sending mouse/keyboard events to the guest.
The "Windows host application" is actually the display server, which runs in the guest VM. The only thing that needs to run in your Linux host OS is the `looking-glass-client` application