I don't know what is in the BG installers
For BG2 use OpenGL
If you have BG1 and there is a setup-ddrawfix.exe run that and uninstall that mod.
Fullscreen vsync is broken by ForceDirectDrawEmulation which is applied by that mod
This is stated clearly in mod readme. I also warned GoG not to apply ForceDirectDrawEmulation by default because it breaks vsync.
Apparently they felt more people benefited by having a game that "just works".
You take the time to message GoG and replay on forums,
but you can't be bothered to take the ~15 seconds to uninstall the mod and see if it is the actual cause of your problem?
I did uninstall the mod, I stated that in my reply in the other thread, the old aspect ratio problem still happens unless I change GPU setting so I don't think it's the ddfix mod that's the cause, at least not for me. I think mine and everyone else's problems has to do with something else GOG changed in the 2.0 installers for the Infinity Engine games, granted i'm not having quite as serious problems as others here and others have no problems at all, but i'd like to know for certain that these installers aren't going to give me serious problems later on before I waste my time making back ups of the games.
Edit: In other words, we've established that the screen tearing is caused by the ddfix, though the screen tearing is very minor (almost unnoticeable) for me. What i'm trying to figure out is what is causing the other issues, my minor aspect ratio problem (which i've worked around) and deathknight1728's problem with not being able to install the games at all. I still think there's a minor issue or two with the 2.0 installers for the Infinity Engine games, all I wanted to do was bring GOG's attention to these issues a few of us are having in case there was something wrong with the installers that GOG missed, I didn't mean to start a ruckus or anything.