16.04 change from Intel HD Graphics to Radeon

sudo lshw -c video

  *-display
       descrição: VGA compatible controller
       produto: Broadwell-U Integrated Graphics
       fabricante: Intel Corporation
       ID físico: 2
       informações do barramento: pci@0000:00:02.0
       versão: 09
       largura: 64 bits
       clock: 33MHz
       capacidades: msi pm vga_controller bus_master cap_list rom
       configuração: driver=i915 latency=0
       recursos: irq:50 memória:c1000000-c1ffffff memória:d0000000-dfffffff porta de E/S:5000(tamanho=64)
  *-display
       descrição: Display controller
       produto: Topaz XT [Radeon R7 M260/M265]
       fabricante: Advanced Micro Devices, Inc. [AMD/ATI]
       ID físico: 0
       informações do barramento: pci@0000:04:00.0
       versão: 00
       largura: 64 bits
       clock: 33MHz
       capacidades: pm pciexpress msi cap_list rom
       configuração: driver=amdgpu latency=0
       recursos: irq:49 memória:b0000000-bfffffff memória:c0000000-c01fffff porta de E/S:3000(tamanho=256) memória:c2000000-c203ffff memória:c2040000-c205ffff

lspci -nn | grep VGA

00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09)

xrandr --listproviders

Providers: number : 3
Provider 0: id: 0x68 cap: 0x9, Source Output, Sink Offload crtcs: 4 outputs: 5 associated providers: 2 name:Intel
Provider 1: id: 0x3f cap: 0x6, Sink Output, Source Offload crtcs: 0 outputs: 0 associated providers: 2 name:TOPAZ @ pci:0000:04:00.0
Provider 2: id: 0x3f cap: 0x6, Sink Output, Source Offload crtcs: 0 outputs: 0 associated providers: 2 name:TOPAZ @ pci:0000:04:00.0

Is there anything I can do so I can make it to switch to the radeon? According to this the Radeon driver is already pre-installed

After that update, a lot of steam games aren't be able to play decently using intel

With the application Catalyst I just need change a simple option.
Now , without Catalyst on 16.04, now become so hard.
I have no idea how to change it...
Plesae, help