Disable DPI scaling on NX Client?

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  • #49020
    martona
    Participant

    I’m accessing a Mac from a Windows client. The Mac has its desktop resolution at 1920 by 1080. The Windows monitor is 3840 by 2160, set to 125% scale – in other words exactly 2x the resolution of the Mac, but applications are asked by Windows to scale up by 25%.

    The issue is that the Mac image comes across blurry with NX. If I enable viewport mode, the image is scaled to 125%, blurring the edges of fonts. This is understandable – but when “scale to window” is selected (which should just be a simple 2x magnification and produce no artefacts) the image is even blurrier; it seems it’s first scaled to 125% and then that image is scaled to 200%, which doesn’t make it easy to look at.

    Accessing the Mac with a VNC client that has DPI scaling disabled is super crisp, because the pixels are displayed 1:1 or 2:1. Unfortunately VNC is terrible from every other respect.

    Clearly the double-scaling thing is a bug, but until that’s fixed – or instead of – is there a way to get the NX client to disregard DPI scaling completely on the client side? Whatever it’s doing right now is actively making things worse.

    Unfortunately I can’t set the Windows desktop to 100% (which would solve the issue) because at 4K even 125% is barely legible for me.

    #49038
    Tor
    Participant

    Hi martona. You can tell Windows to ignore the DPI scaling for a specific application by changing a compatibility flag: right click the application shortcut or binary, select Properties, Compatibility tab, click Change high DPI settings, check the box “Override high DPI scaling behavior” and select “Application” in the combo (it is the default).

    #49040
    martona
    Participant

    Hey, thanks – I’ve tried to play with those settings a fair bit. Turning on application-controlled scaling makes the main UI smaller & crisper, but doesn’t have appreciable effect on the remote display.

    I’m not trying to make a mountain out of a molehill but the difference is staggering. Inline images aren’t working for me for some reason, hence the two attachments, VNC vs. NX.

    #49050
    Tor
    Participant

    Did you try to disable the scale to window mode after changing the DPI scaling configuration on Windows? Is the quality better?

    #49059
    martona
    Participant

    It’s a bit clearer but not perfect. (See small attachment.)

    But the other problem is that it’s not very usable this way (as per large attachment).

     

    #49083
    Tor
    Participant

    Hi Martona. Your large attachment was probably refused because of its size. Could you send it to forum[at]nomachine[dot]com, please?

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