DPI Settings not detected when scaling changes

Description of your problem

I have had the (mis)fortune of getting laptop with high-dpi (250%) but having to work with monitors that are set to 100% scaling. The title bar scaling is a little off when changing DPI settings (aka changing monitors).

What steps will reproduce the problem?

1. Use a monitor with only 100% scaling (Do not use your 250% monitor)
2. Change monitors (to one that uses 250% scaling)
3. Open spyder. The title bar will not be scaled well.

Workaround: Log out and Log back into the windows.

What is the expected output? What do you see instead? Title bar should have correct scaling.

Versions and main components

• Spyder Version: 3.2.6
• Python Version: 3.6.3 64 bit
• Qt Version: 5.6.2
• PyQt Version: 5.6
• Operating system: Windows

Dependencies

Please go to the menu entry Help > Optional Dependencies (or Help > Dependencies), press the button Copy to clipboard and paste the contents below: IPython >=4.0 : 6.2.1 (OK) cython >=0.21 : None (NOK) jedi >=0.9.0 : 0.11.0 (OK) nbconvert >=4.0 : 5.3.1 (OK) numpy >=1.7 : 1.14.0 (OK) pandas >=0.13.1 : 0.22.0 (OK) pycodestyle >=2.3: 2.3.1 (OK) pyflakes >=0.6.0 : 1.5.0 (OK) pygments >=2.0 : 2.2.0 (OK) pylint >=0.25 : 1.7.4 (OK) qtconsole >=4.2.0: 4.3.1 (OK) rope >=0.9.4 : 0.10.7 (OK) sphinx >=0.6.6 : 1.6.3 (OK) sympy >=0.7.3 : None (NOK)

[ccordoba12]

Thanks for reporting. Unfortunately, none of us have a high dpi screen to test this.

[JialongJiang]

I had a very similar issue with a high-dpi screen. Thank you so much for the workaround method. It works in my case.