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 with gnome 3.4.2 and have a toshiba satellite L650-1EQ:
Processador:
Intel® Core™ i5-450M
velocidade de relógio : 2.40 / 2.66 Turbo GHz
Front Side Bus : 1,066 MHz
cache de nível 3 : 3 MB
Memoria:
standard : 4,096 (2,048 + 2,048) MB
máxima expansibilidade : 8,192 MB
tecnologia : DDR3 RAM (1,066 MHz)
Placa Grafica:
ATI Mobility Radeon™ HD 5145 com HyperMemory™
memória : 512 MB VRAM dedicados
tipo de memória : DDR3 Video RAM (resp. Video RAM and system memory combined)
conetor bus : PCI Express®
Any help would be apreciatted since this problem is driving me nuts since Ubuntu 12.04 LTS

Thanks in advance.