1) Can you specify a link to a webpage where the problem becomes obvious? You said that the jerky mouse with Oddyssey prevents zyou from surfing the web and, hence, from using FinalEdition. So, I guess, it should be easy for you to point me to some web pages where the issue shows up.
Any heavy webpage such as Facebook, CNN or any huge loading sites. But not only Odyssey, anything that is CPU demanding will cause this.
2) Could you try for testing to put your PCI GFX card into the PCI slot -- just to be sure that not your riser card causes the issues?
In the PCI slot, it's worse : slow mouse, slow display and so on. This is the reason why I decided to use the adapter. I tried again and still really slow with a really jerky mouse pointer.
3) for completeness: please specify your resolution and connection (VGA/DVI) so I can test a similar setup. Are in "Sys:Prefs:Gui" -> Effects enbabled or disabled?
1920x1080 32 Bits. Same problem in 16 bits. I tried every connection (VGA, DVI, DVI->VGA adpater) and still the same trouble. If I disable effects, it's a little bit better but whenever a multitasling docky (or Dnetc for example) is activated, the same pronlem happens again.
I even tried different mouses on different USB ports.
4) Can you confirm that your problems remain in a 16-bit screen, too?
I can confirm this fact. Same behaviour whether in 16bits or 32Bits.
It used to work perfectly with AmigaOS 4.1 Update 6.