Indivision AGA MK2 issues

[rxxic]

You surely changed the PAL-interlace resolution from the default 800x600 to 1280x1024.
If you open the IndivisionAGA config tool, you have to select the PAL-interlace entry on the Left section, the middle section will show a 1280x1024 resolution highlighted. On the Right section you will see a line named "Double" and two cycle-gadgets to the right.
I suppose you have the first set to "S-HiRes" and the second one to "Lines"; change them respectively to "Hires" and "Off" and then click on "Test". It should display the full screen now. If you are happy with the result you can then hit "Apply" and "Save".

You can also select "Default Config" in the "Config" menu, then hit "test", "apply" and "Save" to take it back to factory defaults.

[rxxic]

If you have not changed any resolution by accident, and it was working before you switched from vga to dvi/hdmi, then most probably the monitor supports a different Frequency range for the two ports (vga and hdmi).
That said, the "screen resolution" for the games is out of that range and you need to change it.

Like before, open the indivision AGA prefs tool, this time select the PAL entry on the left section, and the 800x600 60Hz vga Mode in the middle section. Click on "test" in the lower section, and if you are happy with it, press "apply" and "save"


Edit: if 800x600 distorts the image too much, try with 16:9 resolution like 640x360, 768x432, 896,504 1280x720 from the middle section.