Bug report

Bug summary

This is a follow up on #8061, which was closed in #8931. That PR resolves updating the figure bounds when the figure is moved between displays with different resolutions. However, the issue persists that figures on the low-res display have way too large line widths and text sizes when a retina screen is present.

Matplotlib version

• Operating System: OS X 10.12.6
• Matplotlib Version: 2.0.2
• Python Version: 3.6.1
• Other Libraries: Qt

Screen shots
The following two screenshots are taken from the same window, after moving it on either of my two screens.

On the MacBook Pro's retina screen:

On the additional 2k 27in screen:

[TAC edited to fix xref]