I wish to thank Benno, Jerry and Richard for their help. However, I've found another solution ;-)
I have presented my daughter with my HP dv5000z, and so I've got rid of that irksome and ill-supported ATI Radeon XPRESS 200M. I'm going to purchase a new HP dv2000 (Turion X2, Geforce 6150). ;-) Thanks a lot! Sergio -- gentoo-user@gentoo.org mailing list