Arch Linux

magaso

Member

Registered: 2009-03-07

Posts: 22

Dual head with Intel integrated GPU and AMD discrete GPU

I am trying to get a dual head setup working which utilizes both my onboard GPU (Haswell i3 CPU) and my AMD graphics card (HD6850).

I can't get either one to work, but not both at the same time. The following configuration file enables me to move the cursor between the two screens, but the secondary screen is just a blank X11 server without anything running. Furthermore, it is not recognized by KDE or xrandr as existing. Enabling Xinerama uses both screens, but the login process to KDE fails (And the process seem rather sluggish).

Does anyone have any recommendations as to how I can get this dual head setup working?

Section "Device"
    Identifier             "GPU Intel Haswell IGP"
    Driver                 "intel"
    BusID                  "PCI:0:2:0"
EndSection

Section "Device"
    Identifier             "GPU AMD Radeon HD6850"
    Driver                 "radeon"
    BusID                  "PCI:1:0:0"
EndSection

Section "Monitor"
    Identifier             "Monitor Samsung"
    Option                 "Primary" "true"
    Option                 "PreferredMode" "1920x1080"
    Option                 "Position" "0 0"
EndSection

Section "Monitor"
    Identifier             "Monitor SHG"
    Option                 "PreferredMode" "1280x1024"
    Option                 "Position" "-1280 0"
EndSection

Section "Screen"
    Identifier             "Screen SHG"
    Device                 "GPU Intel Haswell IGP"
    Monitor                "Monitor SHG"
EndSection

Section "Screen"
    Identifier             "Screen Samsung"
    Device                 "GPU AMD Radeon HD6850"
    Monitor                "Monitor Samsung"
EndSection

Section "ServerLayout"
    Identifier      "Main Layout"
    Screen          0 "Screen Samsung"
    Screen          1 "Screen SHG" LeftOf "Screen Samsung"
EndSection

Xabre

Member

From: Serbia

Registered: 2009-03-19

Posts: 757

Re: Dual head with Intel integrated GPU and AMD discrete GPU

Are you sure that both cards (IGP and DGP) have physical output?
You did not specify in your post, but it sounds like a laptop too me. On my Probook (HD4600+RadeonHD8750M), all outputs (eDPI, VGA and HDMI) are physically attached to Intel card.

Or, am I wrong and it is a desktop with both cards having direct output?

magaso

Member

Registered: 2009-03-07

Posts: 22

Re: Dual head with Intel integrated GPU and AMD discrete GPU

It is a self-assembled desktop, so both cards have direct output.

Xabre

Member

From: Serbia

Registered: 2009-03-19

Posts: 757

Re: Dual head with Intel integrated GPU and AMD discrete GPU

Oh, OK, my bad, sorry.