Don’t use PS2 keyboard with your PS3
I had an old USB keyboard and mouse laying around from the PS2 linux kit. Since I needed exactly this when running linux on PS3 I thought it must be a perfect fit, both Sony and PlayStation logotypes on them and all. Don't make the same mistake! This keyboard and mouse is clearly incompatible with the PS3. I have no idea what would be the problem, I mean it's USB right? But I had all sorts of weird problems with the keyboard in particular. I often had to pull it out and plug it back in for it to come back to work. There are much better alternatives, use them!