I've been doing testing with my PS2 Slim (SCPH-70001) and UDPBD (Server Commit: 63e0eac, OPL 1.2.0 Beta 2044) and have been compiling a list for myself of the necessary modes to get games working properly. I'm aware that UDPBD isn't yet integrated to the master branch of OPL and as such the OPLCL website hasn't had compatibility information added, but I had the thought that it may not hurt for people to be able to start being able to report game compatiblity. This way configuration testing can be done over time while UDPBD is still experimental before it's added to OPL.
For anyone searching for configuration options, all of the Beatmania IIDX games require Mode 1 and 2 using UDPBD to work properly without desyncing, or hanging at the end of a song, and the skip movie mode if using SMB.
For anyone searching for configuration options, all of the Beatmania IIDX games require Mode 1 and 2 using UDPBD to work properly without desyncing, or hanging at the end of a song, and the skip movie mode if using SMB.