Arch Linux

john_schaf

Member

From: France

Registered: 2007-02-24

Posts: 104

cannot set 1920x1080 screen resolution with intel GM945

Hello everybody,

I just bought a big screen which supports 1920x1080 resolution.
I have a laptop (samsung nc10) with an intel 945GME graphic card.

Using windows, no problem to use the external monitor with a resolution of 1920x1080, even with dual-screen setup.
But on linux, I'm somehow limited to 1280x1024.
Xrandr does not show a mode higher than that, and even by "adding" it it says
xrandr: screen cannot be larger than 1280x1624 (desired size 1920x1080)

I now the hardware limitation is 2048x2048 but this is way below !

Anyone knows about this problem and how to solve it ?

cheers,
Nat

Shapeshifter

Member

Registered: 2008-03-11

Posts: 230

Re: cannot set 1920x1080 screen resolution with intel GM945

You might need to set a "Virtual" screen size in your xorg.conf for X to allow higher total resolutions. Here's how mine looks, my lap top screen is 1440x900 so I added 1024 to the right value of "Virtual" so that I attach a beamer. Mind that as you said, the max size for the GMA945 is 2048x2048, and this applies for both screens in total. So you can't have two screens side by side if the total width exceeds 2048.

Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        DefaultDepth 24
        SubSection "Display"
                Depth     24
                Modes "1440x900"
                Virtual 1440 1924
        EndSubSection
EndSection

john_schaf

Member

From: France

Registered: 2007-02-24

Posts: 104

Re: cannot set 1920x1080 screen resolution with intel GM945

Thank you very much, that was it !
I completely forgot I set this to 1280x1624 ....