HiDPI is for doubling things like bitmaps, whose size is fixed in pixels. In that image I don't really see any bitmaps that would benefit from this, only text, and text is always scaled to the right size. Therefore, it looks like the problem is just that X is not detecting the DPI of the monitor correctly.
HiDPI is for doubling things like bitmaps, whose size is fixed in pixels. In that image I don't really see any bitmaps that would benefit from this, only text, and text is always scaled to the right size. Therefore, it looks like the problem is just that X is not detecting the DPI of the monitor correctly.