ATI Mobility HD 5145 drivers 12.6 weird error

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http://forums.fedoraforum.org – Hello. I have this problem with this graphic card and this drivers that I can't make sense of it. When I installed ati 12.6 drivers everything goes well then I reboot and this happens when booting Fedora 17 and hangs there forcing me to unnistall the drivers via recovery mode and installing the open source ones. I follow the guide for installing ati drivers here on forums but it didn't work :( I tried to install the 12.4 drivers thinking might be some incompatible problem but same issue. Anybody have any ideas? I don't really like the open source drivers. I'am running Fedora 17 64bits w (HowTos)