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When I installed Freya on a 22" Screen, everything was fine. But when I plug the PC in a 40" TV, the desktop is upscaled to 200%. The screen resolution is correctly 1920x1080 but because of the upscaling it looks more like 960x540.

When I rescale it with xrandr --output DFP2 --scale 2x2 the screen looks fine, but the mouse cursor is confined to the top left quarter of the screen.

How can I fix this problem?

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  • My answer is pretty much a shot in the dark as this problem is probably hard to debug...
    – quassy
    Jul 16, 2015 at 19:50

2 Answers 2

Reset to default
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dconf-editor

(Install dconf-editor by typing sudo apt-get install dconf-editor in the command line.)

Open dconf-editor and navigate to org.gnome.desktop.interface and check the value of scaling-factor. It is probably set to 2 (which is for high density displays) and you should change it to 1. For now, non-integer values will not work.

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  • What do you mean by "as of now"? A recent update to dconf or Gala or what?
    – Gabriel
    Jul 16, 2015 at 20:56
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    It was set to 0, probably auto scaling. Changing it to 1 worked fine. Thanks.
    – Gan
    Jul 16, 2015 at 21:37
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    @Gan Please accept an answer if the answer solved your problem. Thanks
    – Stiffler
    Jul 17, 2015 at 14:07
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    @Gabriel Mistake on my part. I don't think floating numbers were ever supported.
    – quassy
    Jul 17, 2015 at 19:38
  • 0 uses the default for the display btw. I was fiddling with numbers, then set it back to 0 and some windows weren't changing, but after a reboot (still set at 0), everything looks good.
    – Travis Reeder
    Feb 15, 2017 at 19:28
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Terminal

To solve your problem without installing extra software:

  • Open Terminal

  • to get your scaling factor
    gsettings get org.gnome.desktop.interface scaling-factor

  • to set your scaling factor
    gsettings set org.gnome.desktop.interface scaling-factor 1

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