Different DPI on different monitors leads fuzzy apps

[harryzwh z]

I have a laptop equips with a screen with resolution of 2880x1800 and I set the DPI scaling to 150% which equivalents to a 1920x1200 monitor. I also connect an external monitor with resolution of 1920x1080 and the DPI scaling is set to 100%. The display on the internal monitor is clean and clear for all applications. However, some apps, inlcuding build-in apps, such as task manager and third party apps, like Matlab, become fuzzy when it is dragged to the external monitors. A futher testing suggested that there will be no fuzzy rendering only if the same DPI scaling is applied to all monitors,

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