Hi, I’ve hooked up my 32inch CRT TV to a Windows 8.1 box (crt emudriver installed). I get weird lines in animations such as the machine gun bullets in Contra 3 (any SNES core), or the shadow under lakitu in Super Mario Kart. In Simon’s Quest (nestopia core) you can see them in fire animations or anything flashing for a second.They are always evenly spaced apart, and i can’t capture them with my phone’s camera - either the animation disappears, or the lines don’t show at all in the picture. So i drew what they look like in the below screenshot 
Does anyone know what causes this? Windows says its running 640x480 @ 30i. I set RA to 59.9HZ in the refresh settings. Graphics card is AMD 7750-DVI-I->VGA adapter->Component Transcoder->TV. I’m so close to getting this set up… please help, this has been driving me nuts!
Sounds like interlacing problems. I don’t think you’re running at 240p here, if the OS says 480@30.
Is there a shader or RA config setting that can fix this, or does this need to be addressed at a Windows/Driver level? Assuming this issue continues to plague me, do you know if Linux makes things easier with resolutions/refresh rate? This seems a lot more difficult than what the guides make it out to be. Thank you!
linux should be a lot easier, yeah. You don’t need to do any stuff with hacked drivers, etc. If you have a spare HDD, I would recommend firing up a test installation without wiping out your Windows progress and see how it treats you.
Nice. Is it plug and play, or do i need to hunt down linux packages somewhere to make it easy to get 240P? I preferred Windows because of Launchbox, but Retroarch can look pretty nice too.
It should just be a matter of launching RetroArch and enabling the switchres option. That is, you don’t need to install the modelines ahead of time or anything. It creates them on the fly.
You should be able to check the res that Retroarch uses when launcing a particular core by either looking at a log or taking a screenshot.
I did this recently when I ran a quick test with Switchres and a Notebook under Linux, where I somehow ended up with Switchres creating the core modelines but using the interlaced resolution of the desktop I had created earlier. There were issues with correct monitor detection, but it was just a quick test, haven’t fiddled around much yet. If all fails I just use manually created modelines I guess.