Ok so, I had a perfectly working haxchi + CBHC. Then I discovered about padcon, which is actually great and lets you turn off the gamepad screen by pressing R3. I wanted to have that by keeping pressed one button at boot, so here's what I did:
I retrieved the haxchi's config.txt and changed a=fw.img to a=wiiu/apps/Padcon/padcon.elf
I ran haxchi installer again and reinstalled haxchi.
That's it, now my wii U only boots in homebrew launcher. I already tried restoring the original config.txt and reinstalling haxchi again. Didn't work.
I retrieved the haxchi's config.txt and changed a=fw.img to a=wiiu/apps/Padcon/padcon.elf
I ran haxchi installer again and reinstalled haxchi.
That's it, now my wii U only boots in homebrew launcher. I already tried restoring the original config.txt and reinstalling haxchi again. Didn't work.