First and foremost, I'm on Android 2.3.6. I used the XWLA4 insecure kernel to flash my SGS2 (since my official Samsung kernel is indeed XWLA4) and used S2Root to install BusyBox and superuser, but I had no CWM recovery so I manually installed CWM 126.96.36.199 via Odin.
It worked like a charm Now came the time to flash a custom firmware. I was thinking of MIUI, CM7 (because I didn't like stock ICS that much) and this new Fatal1ty Extreme ROM. In fact, I liked said ROM so much that I wanted to have it on my phone + the Red theme. And that's where the annoyance began..
I've carefully read all the instructions, but I didn't understand one:
"Copy the ROM to the Root dir of your SD card."
I thought it was just some directory in my USB storage, so I connected my device to my computer and connected the USB storage, yet I didn't find any folder named "Root" or anything that resembled a root directory.
After 1 hour of googling and extensive research, I was so annoyed that I just dragged the ROM + Theme to my USB storage.
I boot into CWM recovery, did a wipe (data/factory reset, dalvik cache wipe etc.) and then installed the ROM. When I rebooted, THIS happened:
I was stuck at the first screen, the one that said "Samsung Galaxy SII" on it with the yellow triangle!
And this screen did not go away until I boot my phone into download mode and flashed the official XWLA4 kernel from Samsung, aka unroot my phone.
After Unroot, my phone worked like normal. No bootloops, no being stuck on the first screen etc.
Can someone please shed light on this? Touchwiz isn't exactly my cup of tea anymore and I really would like to give my phone a custom look ._.
Thanks in advance
EDIT: It seems that this problem seems big, as every ROM that I flash (with wipes) takes <5 seconds to finish, and that usually means that it's a bad flash ._.
Can someone tell me how to solve this?