If you're having problems with OPL's IGR on 50% of games, then you're either unlucky as to your choice of games, using a non-optimal build of OPL (latest build has no such issues, at least with it set to go back to the OSD), or something else I don't know. I only have a handful of games that IGR doesn't work with, and by disabling IGR for those games (mode 6) I have no problems at all. This is on my 39001 with ROM OSD-based FHDB installation on HDD. If you're using USB, it wouldn't surprise me that IGR would cause some nasty issues (I remember running the later Guitar Hero games from USB, and with IGR off they would play fine, but with IGR on they would occasionally stutter and the border would turn purple, similar to when you activate IGR except for the actual resetting).
Originally Posted by lee4
As I recommend to everyone, the fat PS2+network adapter+HDD combination is really the most ideal way to play PS2 games. Much easier to carry your system and games with you and not having to worry about wiring as much up when you get there (just video cable and power cord, and if you're going somewhere there's already a PS2 hooked up, you can save on having to get behind the TV). Games load same or faster as compared to optical disc, and compatibility is nearly 100% (I know there are a few games that have issues with OPL period, and I think at least some of these same games also have problems with ESR, I would guess IOP RAM on these games is tighter, but I'm not 100% sure). Every game I have on my HDD works fine with an IGR-enabled build of OPL, although a few (like the entirety of the Guitar Hero and Rock Band franchise) I keep IGR disabled, since it doesn't work with them. The game will boot and play fine, but when trying to actually reset the PS2 using L1+L2+R1+R2+SELECT+START it will appear to be resetting, but after the border flashes purple the screen just goes black and stays there. I keep it disabled on these games, but it'd be worth testing to see if the power-off function (L1+L2+L3+R1+R2+R3) works with them even when IGR doesn't. A workaround for these type of IGR-incompatible games would involve the poweroff joker combined with the DVD player remote (or a compatible universal) to turn the system back on if you are using a V9 console (SCPH-5000x and up), on previous consoles with the IR dongle the power/reset button on the remote will do nothing.
Chip-free/MC-free homebrew <3
FMCB 1.93 on MC for emergencies, NA
250GB HDD/FHDB 1.93/OPL 0.9.2 (GSM and non-GSM)/PS2 games, NO HDDOSD
80GB HDD/FHDB 1.93/POPStarter rev12/OPL644/GSM0.37/PS1 games, NO HDDOSD
SCPH-75001 (sitting idle, slims suck):
FMCB 1.92 on MC