If you insist on using IVSHMEM for Scream despite it's inferiority to the default network implementation the Windows Host Application can be told what device to use. Create a looking-glass-host.ini file in the same directory as the looking-glass-host.exe file. In it, you can use the os:shmDevice option like so:
<syntaxhighlight lang=INI-style>
[os]
shmDevice=1