I had to disable Translucency because Xorg gets stuck (first login has been a pain)
In the Mageia Control Center I tried several driver options:
-Vendor -> ATI -> Radeon HD 4870 and earlier (the default option)
-Vendor -> ATI -> r300/r400/r500 based FireGL (this should be the right choise, but in fact it doesn't change anything)
-Xorg -> ati (no effect)
-Xorg -> Vesa (gives an error if i run the test)
but no one seems to change anything.
In addition to this sometimes I have complete freezes and I have to reboot
