I think what's happening is that the PS TV is taking on that the EDID that's receiving as the display/device it's connected to not being able to do this resolutions and hence it doesn't let you choose them.magus90 wrote: In 720p on the PSTV, the 5x wouldn't let me choose any other output but 720p. I don't know why. So that mode is useless for me.
In 1080i on the PSTV, going into the 5x, i was getting image issues. Essentially the top 5% of the image there was a horizontal line across and it was repeating the lower 5% of the image, but on the top as well. No idea why. It would pop in every few seconds and go away, and repeat. Otherwise it looked nice and the input lag was manageable.
You can try connecting via HDMI to another display or device that does this fine for the console (you may need to restart the console for the other resolution options to be enabled again) and after changing it, disconnect it and connect it back to the adapter and 5x, the PS TV should keep in with the resolution it was set with one before.
Although if the adapter or 5x isn't compatible with the resolution it could cause a garbled image or just not show it.