Is there a way to have different scaling per monitor? I have a 4K and a 1440p monitor on my desktop computer and by default gnome seems to apply the same scaling to each monitor which is kinda frustrating as the 4K is too tiny and if I increase the scaling then everything on the 1440p monitor is too big 
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If i’m not mistaken - conveniently - only with Deepin (meant through settings, not with some terminal magic and complex configs)
I’d like to be wrong though 
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Here you go Gnomer 
Try terminal / dconf 
And tell us if it works please, i’m also wondering…
P.S. hmmm…Need to test it on KDE, haven’t tried for a while
https://bbs.archlinux.org/viewtopic.php?id=253174
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lxrandr ?
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No luck 
Applied it and restarted just to be sure and no success. Each time I change the scaling on one monitor it applies the same scaling to the other.
Installed it but has no options for scaling in general, let alone per monitor (at least the arch package for it doesn’t contain it).
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Have you already seen this page? https://wiki.archlinux.org/index.php/GDM#Setup_default_monitor_settings
No luck with the monitor.xml file either I’m afraid.
This thread might help give you some clues:
This could work, but I disclaim any responsibility on my part.
gsettings set org.gnome.mutter experimental-features "['x11-randr-fractional-scaling']"
If it doesn’t work, you can go back:
gsettings reset org.gnome.mutter experimental-features
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keybreak reacted with 
keybreak reacted with 
keybreak reacted with
Well… no big deal! 
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I was little bit (NOT) scared of experimental responsibilities… 
P.S. btw you got wrong order, it’s just forum sorting
It was:
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Did you come up with a solution?
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Nah, the solution you suggested was the same as the one posted by @keybreak earlier and didn’t work unfortunately. I did a bit of googling and it appears you might be able to do it via some xrandr commands but I couldn’t be bothered at this stage playing around with that. Was hoping for something far more plug-n-play. Thanks for trying though.
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Just wanted to mentioned that no, KDE still doesn’t have per-monitor scaling from settings as well, just tested 
This is so embarrassing in 21 century
It’s honestly surprising to me all these years later that it’s still an issue. So many people have 2 different resolution monitors, or at the very least connect their laptop up to another screen when doing work which quite likely will have a different resolution. On top of that, the fact that fractional scaling is also still problematic is also bizarre to me. You would figure these are some of the more requested features in DEs.
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With only exception of crazy chinese DE, which is so buggy, that you won’t care about both of your screens anyway!
Yeah…That’s unbelievable 
I know this is an old thread but since it is the first result on Google I would like to share the current state of affairs.
When using Wayland it still seemed impossible to me, until I enabled Fractional Scaling.
After that was enabled I’m able to select use a different scaling for each of my 3 monitors.
On gnome Wayland? I think that was the case already last year… Gnome 40 and perhaps even 39