Debian vs. ATI Radeon x1650

[Dominik Smatana <dominik@fsf.sk>]

Hello,

some time ago my old machine "went boom" and now I'm desperately trying 
to install Debian on new one...

Everytime I'm trying to start x-server monitor just turns to sleep mode 
and keyboard LEDs keep blinking... I think this problem is related to my 
graphic card - ATI Technologies Inc RV535 [Radeon X1650 Series] rev 158.

Debian Lenny = fail
Debian Squeeze kernel 2.2.26-1-686 = fail
Debian Squeeze kernel 2.6.26-2-686 = fail
Ubuntu 9.04 kernel 2.6.27-14-generic = OK (strange)
Ubuntu 9.04 kernel 2.6.27-15-generic = fail

Any ideas please?

Thanks
Dominik Smatana