erro em driver de placa gráfica

[DanielPrill]

comecei a utilizar o ubuntu agora para poder fazer uns trabalhos da universidade, e então instalei o Ubuntu 12.04 no notebook e funcionou beleza, mas tô precisando criar um servidor DHCP e então instalei o Virtual Box e criei uma máquina virtual e instalei o Ubuntu 12.04, mas depois de terminar a instalação e reiniciar a máquina virtual não funcionou a parte gráfica.. só dá pra acessar no modo texto...

creio que essa seja a descrição da placa:

*-display
descrição: VGA compatible controller
produto: RV710 [Mobility Radeon HD 4300/4500 Series]
fabricante: Hynix Semiconductor (Hyundai Electronics)
physical id: 0
informações do barramento: pci@0000:01:00.0
versão: 00
largura: 32 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuração: driver=radeon latency=0
recursos: irq:47 memória:c0000000-cfffffff ioport:6000(tamanho=256) memória:e8400000-e840ffff memória:e8420000-e843ffff

Google translation:
I started using ubuntu now to be able to do some work at the university, and then installed Ubuntu 4.12 on notebook and ran beauty, but I'm needing to create a DHCP server and then installed Virtual Box and created a virtual machine and installed Ubuntu 12.04 but after finishing the installation and restart the virtual machine did not work the graphics .. only gives access to text mode ...I believe this is the description of the board:*-Displaydescription: VGA compatible controllerproduct: RV710 [Mobility Radeon HD 4300/4500 Series]Manufacturer: Hynix Semiconductor (Hyundai Electronics)physical id: 0information Bus: pci @ 0000:01:00.0Version: 00width: 32 bitsclock: 33MHzcapabilities: pm msi PCIExpress vga_controller bus_master cap_list romconfiguration: driver = radeon latency = 0resources: irq: 47 memory: c0000000-cfffffff ioport: 6000 (size = 256) memory: e8400000-e840ffff memory: e8420000-e843ffff

Moved to using Linux until we figure out if it is a Linux Host or Guest. Please post in English.

[mpack]

If I understand correctly, it's an Ubuntu 12.04 guest. Is this the good old black screen in Ubuntu 12.04 issue? What version of VirtualBox is it? What version of the Guest Additions?

A VM log file is needed.