When I resize my qemu/kvm window with my VM running CentOS 7 with Xorg QXL driver the resolution in the guest X server changes nicely, but the physical monitor dimensions are not updated. This makes the DPI as reported by e.g. xdpyinfo wrong and DPI-aware applications end up looking very bad. When the screen size is changed the DPI should be updated too.
This has been vaguely discussed in the past, but gdk/gtk support wasn't really ready. At this point, I hope it can be done in a portable manner. Since this will require changes in multiple components (protocol, agent, driver etc), moving to RFE
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