I made a lot of tests and I understand now why my screen goes black with virtual jaguar, cemu...
As I already said, I have in Arcade OSD 2 640x480 resolutions:
If I checked resolution before launching game, here is what I have:
Monitor: Generic Non-PnP Monitor
Device: \\.\DISPLAY1
Adapter: AMD Radeon HD 7800 Series
(640 x 480 x 32 bpp) 60Hz default up, attached, primary, interlaced (0,0)
When launching virtual jaguar, it switches from interlaced to non interlaced 640x480 resolution
Monitor: Generic Non-PnP Monitor
Device: \\.\DISPLAY1
Adapter: AMD Radeon HD 7800 Series
(640 x 480 x 32 bpp) 60Hz default up, attached, primary (0,0)
So my screen goes black because my JammaSD protects my 15k screen.
@Calamity, I know you said it's normal to have 640x480 2 times in Arcade OSD and emulators are badly developed, bu can you confirm I can do nothing for this problem ? Because I don't need this generated non interlaced 640x480 resolution.