[whych]

Ket_nn
>I do not understand what's going on. ATI must pay me for my >wasted time and all these troubles. More, they have to highlight >everywhere that their graphic cards are NOT suitable for Linux >(in most cases: see, how many complaints are on the forum).
>Merde.

Welcome to linux and the surprises! We all do a lot of unpaid work for the major vendors. In the early days linux was for geeks and you had to know exactly what hardware you had and for it to even install and then for Xwindows, exactly what your moonitor's specs were.
Thankfully most of that has changed.

I would either try:
1. Start in run level 3 and then type the aticonfig --initial and then configure sax2. If you get sax to run, start with a vesa monitor at 60 hz.

or

2. run it all by unplugging the monitor from the kvm and plugging it all into the pc and starting afresh.

Some of the cheaper kvm's don't allow a pass through for the monitor and the same goes for some of the high end ones (my old hp/compaq rackmount one is the same - it was designed for a max screen of 1024x768) and this messes up sax's autodetect routine.