So I know there hasn't been a lot of activity in this thread as of late, I was still curious if anyone knows how to get the backlight to stay on when using the filestreamer and dummy at the same time?
[EDIT] So I actually figured out the timing trick finally. To anyone else who is interested in this it goes like this: you need to connect the dummy before you hit enter on the powershell console. However the backlight likes to automatically turn off if you connect the dummy while the 3DS app is already loaded. So to avoid this, setup the dummy and then select connect before you open the app on the 3DS, then open the app on the 3DS. Once it loads you should see the white text on the top screen, then after a couple of seconds the dummy will connect to the 3DS and the white text will disappear, though you will notice that the backlight will still be on. After the white text disappears there will be about a 2 second window before the backlight turns off, this is when you need to hit enter on the powershell. If done correctly, you should be able to use the 3DS controller and stream the screen at the same time. If you are unsuccessful, close the 3DS app and try again.
Now that I have that fixed, I realized that the controller isn't working with the DS emulator that I'm using (No$gba); the touchpad works but none of the buttons do. I know I have them mapped correctly and they work because when I open a notepad the 3DS can type in it but it won't control the game. I saw an earlier post recommending that I open the dummy as administer but that doesn't make a difference.
One more thing that I noticed is the filestreamer cuts out after about 10 minutes of use and I have no idea why.
If anyone has any advice for these it would be greatly appreciated!
[EDIT AGAIN] I ended up PMing Sono directly and he helped me through the rest of my issues. For those who are interested, here are the solutions I came to. The emulator I was using (No$gba) just isn't compatible with the 3DS controller dummy. So I switched to the Desmume emulator and the 3DS controller now works like a charm! Now for the FileStreamer, there really isn't much we can do about it cutting out; it pretty much is a limitation of the N3DS hardware. So I'll just make do without the FileStreamer I suppose