Emulator

urgh, screwed up screenshots again... Once more:
no AA: http://img846.imageshack.us/img846/5948/screenshot2011051415063.jpg
2 samples: http://img88.imageshack.us/img88/1742/screenshot2011051415053.jpg
4 samples: http://img807.imageshack.us/img807/8669/screenshot2011051415060.jpg
8 samples: http://img857.imageshack.us/img857/641/screenshot2011051415071.jpg

Does this happen for any other games as well?

i just tested r7545 the texture branch rewrite, and AA is still working in all of my games in dx 11

What video card are you using?

I'm with a GTX480 and 270.61 drivers.
it works with pikmin 2, f-zero gx and metroid prime echoes
it doesnt work with zelda tww and zelda tp
it seems to be related to the engine the game uses. tp is basd on a heavily modified version of its older brother tww

Did you have EFB to RAM enabled? Does this issue occur with it enabled/disabled as well?

i test all efb to texture/ram configurations and all reproduce the same issue.

This must be you specifically i just test twilight princes with r7545 texture rewrite on Twilight Pricess and AA is still working i can post some pics if you need more verification

due to some strange issues with DX11, dolphin forces efb to ram with cache enabled, which also turns off AA until you bring up the graphics menu. so until you do that, you dont have AA nor this issue. Are you sure you have AA working and not a screwed picture?

relate to the forced efb copy stuff here: http://code.google.com/p/dolphin-emu/issues/detail?id=4497

guess its still not invalid, since it causes more issues...

Sounds like my fix for this issue in r7374 was accidentally reverted. The VerifyValidity calls were causing this unexpected behaviour. The calls are in the following two lines:

http://code.google.com/p/dolphin-emu/source/browse/trunk/Source/Core/VideoCommon/Src/VideoConfig.cpp?spec=svn7497&r=7497#116

http://code.google.com/p/dolphin-emu/source/browse/trunk/Source/Core/VideoCommon/Src/VideoConfig.cpp?spec=svn7497&r=7497#177

The design should not be changing the graphics settings after the ini file is loaded.

Issue 4540 has been merged into this issue.

Just some more support, I also have this issue.

not fixed. also Donkey Kong Country Returns has the same issue!

add one more game to the list: metroid prime trilogy (the main menu). It only show the safety warning unless you disable AA...

This problem also occurs in Wii Sports.
Tested in version r7673.

Update on the metroid bug. The main menu is no longer affected, but:
The Metroid games in the trilogy pack have a really weird issue. When switching to the morphball (and back), the screen will remain black until I change the AA settings. Once changed (to any AA level), the game will reappear. Same issue with (some?) cutscenes. I dunno if the GC counterparts and none-trilogy wii versions are affected, but I doubt it'll make a difference.

P.S. only checked out Metroid Prime 2: Echoes. Might not happen in the other games?