The latest package downloadable on Fujitsu's installs properly, as expected.
However, the problem is it is an "old" driver, dating back fom November 2006. The other major problem is there is NO OpenGL driver in this package (bybye Quake4, Prey, Doom3... and Eduke32 )
So the solution is to install a more recent driver, namely the Catalyst 7.2.
Problem is, such driver packaged by ATI still canno't recognize the Mobility X1900. So this driver package refuse to install.
The method consist in making the X1900 recognized by the driver package, and that's
http://www.driverheaven.net/driverheave ... x1900.html
However, as I stated (?) above, the additional strings provided are wrong for Vista. The one that worked for me is this one.
"ATI Mobility Radeon X1900" = ati2mtag_M58, PCIVEN_1002&DEV_7284
And there is another limitation: The driver package is indeed composed of 2 parts : the driver itself, and the ATI control panel (aka Catalyst Control Center), to manage graphical settings.
Somehow, on Vista you can install the new driver, but the Control Panel itself refused to install.
So to finish, what I've managed to install is
1) The fujitsu package : driver 6.8 + Control panel 6.8
2) Later on, updating the driver part only to driver 7.2
--> as a result, I have a Control Panel 6.8 + driver 7.2.