I’ve replicated the problem in detail.
Panasonic TC-P55S60 Plasma TV
HDMI in through a 4port switch
Ps2 Component into OSSC
Here is what I’ve been doing.
Line4X generic. After adjusting V.Active to 256 and V.backporch to 3. I get a picture. From here I am looking to now make minor adjustments to image ratio through Horizontal pixel size. Here are the current defaults.
H.active is 1280
H.backporch is 170
H.samplerate is 1560
I’m following this link and doing calculations. Horizontal Multiplication factors at bottom of page says to multiply by 3.
H.active is 1152
H.backporch is 198
H.samplerate is 1512
After these changes I have a nice image.
I save the profile. Loading profile or rebooting system shows no image.
In the settings all those numbers are still there. Now if I start changing them back to default. The image appears again.
For now I will avoid adjusting the H.’s and just enjoy the crisp pixels even if the ratio is off a bit.