Comment 0 for bug 1649736

The recently set-hidpi-scale-factor branch provides extremely valuable support for hidpi displays, but it does introduce a few easily fixed regressions because of the way it anchors scaling too rigidly to simulate 140 DPI.

This works well on a 15" Full HD or 4K screen, but sets a non-integer scale factor on 14" and 17" Full HD or 4K screens. Most toolkits don't support non-integer scaling factors very well, and even if they did, it would still result in a loss of sharpness.

The displays mentioned above are perfectly usable at the nearest integer scaling factor, and windows render much more cleanly when set to 1x or 2x than 1.125x or 1.875x. The +-1/8 scale difference in size compared to 1x or 2x isn't worth breaking pixel perfect widget rendering. It would be a good idea to try to default to integer scaling factors whenever reasonable. Otherwise most people will have mangled widgets unless they spend the time to set the scale factor themselves.

Here's the relevant merge: https://code.launchpad.net/~kaihengfeng/unity/set-hidpi-scale-factor/+merge/299380