Monitor interno do laptop não detectado, GPU duplo

Question

O monitor embutido do meu laptop parece não ser reconhecido pelo Ubuntu. A tela é preta embora iluminada. Monitor externo conectado via HDMI funciona muito bem. Não importa se conectado durante a inicialização.

Meu laptop é o Samsung 670Z5E (GPU Intel AMD HD8850M + integrado). Ele roda o Ubuntu 14.04 instalado ao lado do Windows 8.1. Eu instalei o driver proprietário e o Catalyst Control Center do site da AMD, mas não faz diferença.

Qual pode ser o problema?

Veja o resultado de lshw -c display :

  *-display               
       description: Display controller
       product: Venus XT [Radeon HD 8870M / R9 M270X/M370X]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:01:00.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi bus_master cap_list rom
       configuration: driver=fglrx_pci latency=0
       resources: irq:50 memory:e0000000-efffffff memory:f7d00000-f7d3ffff ioport:e000(size=256) memory:f7d40000-f7d5ffff
  *-display
       description: VGA compatible controller
       product: 3rd Gen Core processor Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:47 memory:f7800000-f7bfffff memory:d0000000-dfffffff ioport:f000(size=64)

e xrandr -q :

Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected primary 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
   1280x1024      60.0*+   75.0  
   1152x864       75.0  
   1024x768       75.1     72.0     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     60.0  
   720x400        70.1  
DP1 disconnected (normal left inverted right x axis y axis)

Editar: aqui está xorg.conf :

Section "ServerLayout"
    Identifier "amd-layout"
    Screen 0 "amd-screen" 0 0
EndSection

Section "Device"
    Identifier "intel"
    Driver "intel"
    Option "AccelMethod" "uxa"
    BusID "PCI:0@0:2:0"
EndSection

Section "Device"
    Identifier "amd-device"
    Driver "fglrx"
    BusID "PCI:1:0:0"
EndSection

Section "Monitor"
    Identifier "amd-monitor"
    Option "VendorName" "ATI Proprietary Driver"
    Option "ModelName" "Generic Autodetecting Monitor"
    Option "DPMS" "true"
EndSection

Section "Screen"
    Identifier "amd-screen"
    Device "amd-device"
    Monitor "amd-monitor"
    DefaultDepth 24
    SubSection "Display"
        Viewport   0 0
        Depth     24
    EndSubSection
EndSection

    

Answer 1

Consegui resolver o problema mudando de UEFI para UEFI / BIOS.