After updating to 3.55.2 Rebug i was NOT able to simply jump back to a older fw version. Even with system debug option. There for we still would need the special downgrader pup's to be able to downgrade software wise from xmb with this new function. But on Rebug you still can use togle QA (if you have untogled your con after) and just downgrade back to the fw version you want.
Maybe we will find a way to convert the special downgrader pup's to use on retail cons. Should be possible
qa is disabled i think. i have only changed offsets 0x0002F075/0x000303D5 to 0x82 dex in my flasher backup. this way you can install debug fw from xmb without problems. but to make a full blown debug there must be more things changed. i think some other qa flags or alike.
Humm thats wrong. First post your IDPS but dont post your PSID here just IDPS. This maybe activate to install debug FW but this does not activate lv2_kernel debug and his feature. Cause lv2_kernel debug do some other check's too not only checking for x82.
And don't forget even if you get debugger running this doesn't lead into booting 3.6+ games already. Some additional steps are needed.