Oops, wrong forum, should be in english
I also didn't like the ALT-F5 issue with ATI. No help from
ATI, but found out myself, see registry key below.
Controlling this option through video driver settings was only
possible when I actually connected a real TV to the video card.
Without that, use the registry, maybe needs reboot.
---
Hat mich auch extrem genervt. Null Hilfe von ATI

Selber rausgefunden: Registry Eintrag zu ATI und ALT-F5:
[HKEY_LOCAL_MACHINE\SOFTWARE\ATI Technologies\Desktop\{3746CA2C-F39F-4980-8ACD-6F46E003707E}\Profiles\Schemes\Environment\Switchamongstdisplays]
@=""
"Hotkey"=dword:00000474
or: "Hotkey"=dword:00000000 = no Hotkey
Bei einem Laptop bin ich an die Optionen nur rangekommen
wenn tatsächlich ein TV am S-VHS angeschlossen war. Die
Registry Modifikation geht natürlich immer, eventuell neu booten.
ciao
Peter